VC-4, VC-4A, VC-8, VC-8A, VC-16

INSTALLATION AND OPERATION MANUAL VC-4, VC-4A, VC-8, VC-8A, VC-16 4/8/16-Channel PCM and ADPCM Voice Modules Megaplex-2100/2104 Version 12.9, Megaplex-4100 Version 2.2

VC-4, VC-4A, VC-8, VC-8A, VC-16 4/8/16-Channel PCM and ADPCM Voice Modules Megaplex-2100/2104 Version 12.9, Megaplex-4100 Version 2.2 Installation and Operation Manual Notice This manual contains information that is proprietary to RAD Data Communications Ltd. ("RAD"). No part of this publication may be reproduced in any form whatsoever without prior written approval by RAD Data Communications. Right, title and interest, all information, copyrights, patents, know-how, trade secrets and other intellectual property or other proprietary rights relating to this manual and to the VC-4, VC-4A, VC-8, VC-8A, VC-16 and any software components contained therein are proprietary products of RAD protected under international copyright law and shall be and remain solely with RAD. The VC-4, VC-4A, VC-8, VC-8A, VC-16 product name is owned by RAD. No right, license, or interest to such trademark is granted hereunder, and you agree that no such right, license, or interest shall be asserted by you with respect to such trademark. The RAD name, logo, logotype, and the terms EtherAccess, TDMoIP and TDMoIP Driven, and the product names Optimux and IPmux, are registered trademarks of RAD Data Communications Ltd. All other trademarks are the property of their respective holders. You shall not copy, reverse compile or reverse assemble all or any portion of the Manual or the VC-4, VC-4A, VC-8, VC-8A, VC-16. You are prohibited from, and shall not, directly or indirectly, develop, market, distribute, license, or sell any product that supports substantially similar functionality as the VC-4, VC-4A, VC-8, VC-8A, VC-16, based on or derived in any way from the VC-4, VC-4A, VC-8, VC-8A, VC-16. Your undertaking in this paragraph shall survive the termination of this Agreement. This Agreement is effective upon your opening of the VC-4, VC-4A, VC-8, VC-8A, VC-16 package and shall continue until terminated. RAD may terminate this Agreement upon the breach by you of any term hereof. Upon such termination by RAD, you agree to return to RAD the VC-4, VC-4A, VC-8, VC-8A, VC-16 and all copies and portions thereof. For further information contact RAD at the address below or contact your local distributor. International Headquarters RAD Data Communications Ltd. 24 Raoul Wallenberg Street Tel Aviv 69719, Israel Tel: 972-3-6458181 Fax: 972-3-6498250, 6474436 E-mail: market@rad.com North America Headquarters RAD Data Communications Inc. 900 Corporate Drive Mahwah, NJ 07430, USA Tel: (201) 5291100, Toll free: 1-800-4447234 Fax: (201) 5295777 E-mail: market@radusa.com 1988 2015 RAD Data Communications Ltd. Publication No. 764-238-08/15

Front Matter Installation and Operation Manual ii VC-4, VC-4A, VC-8, VC-8A, VC-16 Megaplex-2100/2104/MP-4100 (ver. 2.x)

Quick Start Guide If you are familiar with the VC modules, use this guide to prepare the module for operation. 1. Preparation for Operation Insert the module in the assigned I/O slot. Connect the prescribed cable to the appropriate module connector, in accordance with the site installation plan. Make sure the Megaplex unit can provide the required feed or signaling voltage (i.e., it has a DC power supply or a Ringer-2100R module, or is connected to a Ringer-2000 or Ringer-2200N). 2. Configuration Procedure To configure the general module parameters and parameters of all the module channels in the MP-2100/MP-2104 chassis, type the command: DEF CH SS * or DEF CH SS CC where SS is the slot number, and CC is the channel number (1 to 4 for VC-4 and VC-4A, 1 to 8 for VC-8 and VC-8A, 1 to 16 for VC-16). To configure the module and channel parameters in the MP-4100 chassis, use the Configuration>Physical Layer>I/O>[slot number] screen. Configuration parameters and the range of values are listed in the following tables. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Configuration Procedure 1

Quick Start Guide Installation and Operation Manual 3. General Parameters Parameter Coding Signaling Encoding Compress Method (does not appear for PCM encoding) Metering Range of Values a LAW u LAW NO RBMF (T1 only) RBF CAS (E1 only) PCM ADPCM G.726 G.727 N/A 16K 12K 4. Channel Parameters Parameter Connect (MP-2100/2104 only) Admin Status (MP-4100 only) Transmit Level Receive Level Fault Propagation (VC-8/E&M/RJ/POS/24 only) Disconnect Tone Wires Num Interface (FXS/FXO only) Sig Feed (FXO only) Range of Values NO YES UP DOWN According to the table below According to the table below Enable Disable YES NO 4 WIRES (E&M only) 2 WIRES LOOP START WINK START (PCM encoding only) N/A NO YES 2 Channel Parameters VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Quick Start Guide Parameter Range of Values Type (E&M only) TYPE 1 TYPE 2 TYPE 3 SSDC5 N/A Operation Mode* Echo Canceler ML Slot* (MP-2100/2104 only) ML Channel* (MP-2100/2104 only) Destination Slot (MP-4100 only) BI-DIR UNI-BRD TX UNI-BRD RX YES NO IO-1 up to the maximum supported by the chassis EX1 up to the maximum supported by the selected main link module CL, IO-1 to IO-10 Destination Port (MP-4100 only) Map Type Start TS 1 to 8 for external ports 1 to 63 (1 to 84) for internal (virtual) PDH ports N/A USER SEQUENCE N/A 1 to 31 for E1 links 1 to 24 for T1 links Transmit and Receive Levels for Various Interfaces Module Interface Transmit [dbm] min max Receive [dbm] min max E&M regular -10 +5-17 +2 E&M 4W enhanced -17 +5-17 +9 FXS -5 +5-17 +1 FXO -3.5 +5-17 +1 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Channel Parameters 3

Quick Start Guide Installation and Operation Manual 5. Assigning Timeslots Assign the uplink bandwidth to each connected channel as follows: When using the BI-DIR or UNI-BRD TX mode in the module installed in the MP-2100/2104 chassis, use the DEF TS command or DEF SPLIT TS A:B:C command to assign a fraction of a timeslot (ADPCM mode only), as explained in the Megaplex-2100/2104 Installation and Operation Manual. For the module installed in the MP-4100 chassis, use the Configuration>System>TS Assignment screen. When using the UNI-BRD RX or BID-BRD RX mode in the module installed in the MP-2100/2104 chassis, timeslot assignment for the receive direction is made using the dedicated routing fields of the DEF CH command. When using the UNI-BRD RX mode in the module installed in the MP-4100 chassis, use the Configuration>Physical Layer>IO screen. 4 Assigning Timeslots VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Contents Chapter 1. Introduction 1.1 Overview... 1-1 Module Versions... 1-2 E&M Module Characteristics and Applications... 1-2 E&M Module Characteristics... 1-2 E&M Applications... 1-4 Fault Propagation... 1-5 Signaling Filter... 1-5 FXS and FXO Modules Characteristics and Applications... 1-5 FXS Module Characteristics... 1-5 FXO Module Characteristics... 1-6 Off-Premises Extension (OPX) Applications... 1-6 Automatic Ringdown (PLAR) Applications... 1-7 PSTN Access Applications... 1-7 Direct Inward Dialing (DID) Applications... 1-8 Payphone Applications... 1-9 1.2 Physical Description... 1-9 VC-16 Front Panels... 1-9 VC-8 and VC-8A Front Panels... 1-11 VC-4 and VC-4A Front Panels... 1-12 1.3 Functional Description... 1-13 Audio Channel Characteristics... 1-13 Timeslot Assignment... 1-14 VC-4, VC-8, VC-16 Modules... 1-14 VC-4A, VC-8A Modules... 1-14 System Capacity... 1-14 Broadcast Applications... 1-15 Handling of Signaling Information Legacy Main Link Mode... 1-15 Signaling Methods... 1-15 Signaling for ADPCM Mode... 1-16 Signaling Information... 1-17 Signaling Profiles... 1-20 Signaling Profile Translation for T1 Links in ADPCM Mode... 1-20 Signaling Feedback... 1-20 OOS Signaling... 1-20 Configuration and Management... 1-21 Test and Diagnostic Capabilities... 1-21 1.4 Technical Specifications... 1-22 Chapter 2. Installation and Operation 2.1 Introduction... 2-1 2.2 Installing the Modules... 2-1 2.3 Connecting the Cables... 2-2 Connector Data... 2-2 E&M Module Connectors... 2-2 FXS and FXO Module Connectors... 2-2 Ferrite Cores... 2-2 Connecting the Cables to Module Connector... 2-3 Connecting the Signaling and Feed Voltage Source... 2-4 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) i

Table of Contents Installation and Operation Manual Chapter 3. Configuration 3.1 Overview... 3-1 3.2 Configuration Sequence for the MP-2100/2104 Chassis... 3-1 3.3 Configuration Sequence for the MP-4100 Chassis... 3-2 3.4 Configuration Parameters... 3-3 General Module Parameters... 3-3 Channel Parameters... 3-4 3.5 Assigning Timeslots... 3-8 3.6 Displaying Status and Configuration Information... 3-8 Chapter 4. Troubleshooting and Diagnostics 4.1 Introduction... 4-1 4.2 Test and Diagnostic Functions... 4-1 Local Digital Loopback (Local Loop)... 4-1 Remote Digital Loopback (Remote Loop)... 4-2 Forward Tone Injection... 4-3 Backward Tone Injection... 4-4 4.3 Troubleshooting... 4-5 4.4 Frequently Asked Questions... 4-6 4.5 Technical Support... 4-7 Appendix A. Pinouts ii VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Chapter 1 Introduction 1.1 Overview This manual describes the technical characteristics, applications, installation and operation of the VC-4, VC-4A, VC-8, VC-8A and VC-16 voice interface modules for the Megaplex-2100, Megaplex-2104, and Megaplex-4 integrated access multiplexers. The VC-16 module provides 16 voice channels using toll-quality 64 kbps PCM voice encoding complying with ITU-T Rec. G.711 and AT&T Pub. 43801. The VC-8 and VC-4 modules are similar, except that they provide 8 or 4 channels, respectively. The VC-8A and VC-4A modules provide 8, respectively 4, voice channels using one of two user-selectable voice encoding modes: Toll-quality 64 kbps PCM voice encoding in compliance with ITU-T Rec. G.711 and AT&T Pub. 43801 Note Toll-quality 32 kbps ADPCM voice compression encoding in compliance with ITU-T Rec. G.726 and G.727. The VC-4A/8A module family, as opposed to the VC-4/8/16 family, has been designed to provide mainly ADPCM services. If you need PCM services only, the VC-4/8/16 family will fully satisfy your needs. However, in addition to their main destination, the VC-4A/8A/16A modules also support the PCM voice encoding. The modules offer flexible configuration of all their operational parameters, including automatic selection of the signaling information format in accordance with the operation mode. Each voice channel of the VC modules supports Caller ID by transparently transferring the FSK modem tones between the incoming rings. With this feature, a customer subscribed to a Caller ID service can see the Caller ID of an incoming or waiting call with any Caller ID display equipment. The voice channels of the VC-4, VC-8 and VC-16 modules support SMS message transfer between the telephones using DECT protocol. In ADPCM encoding mode, each channel requires only half a timeslot. Therefore, a single E1 link can carry up to 31 x 2=61 voice channels and a single T1 link can carry up to 24 x 2=48 voice channels. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Overview 1-1

Chapter 1 Introduction Installation and Operation Manual Module Versions The VC modules are available in the following versions: E&M supports EIA RS-464 Types I, II, III and V (BT SSDC5) signaling. A special E&M/POS version of VC-8 and VC-16 and E&M/RJ/POS/24 version of VC-8 with positive signaling are available for use in those applications (for example, radio transmitters) where positive signaling voltage is required. E&M/POS version enables the module signaling operation at +5V or +12V. E&M/RJ/POS/24 enables the module signaling operation at +24V. A special E&M/EXT version can be ordered for working with the standard E&M ( 48 VDC) voltage. A special E&M/DS version of VC-8 can be ordered for working with double signaling, providing two signaling bits per each voice channel, so that each signaling bit can be changed independently. Note The E&M/POS version operates only with Type II Signaling. For the E&M/RJ/POS/24 version the signaling type is not relevant. FXS supports both loop-start and wink-start signaling, with battery polarity reversal and pulse metering. FXO supports both loop-start and wink-start signaling, with battery polarity reversal and pulse metering. Note In this manual, the generic term VC is used when the information is applicable to all the VC-4, VC-4A, VC-8, VC-8A and VC-16 module versions, and the term Megaplex is used when the information is applicable to all Megaplex chassis types (Megaplex-2100, Megaplex-2104 and Megaplex-4100). The complete designation is used only for information applicable to a specific version. E&M Module Characteristics and Applications E&M Module Characteristics The E&M modules have user-selectable 2-wire or 4-wire analog interfaces using E&M signaling. The interface type (2-wire or 4-wire) can be independently selected for each pair of channels (1, 2; 3, 4; etc.). A special 4-wire version with enhanced gain control is available for any E&M module. Note 4-wire E&M module versions with enhanced gain control do not operate in 2-wire mode. The E&M modules support four types of E&M signaling: EIA RS-464 types I, II, III and V (similar to British Telecom SSDC5). Figure 1-1 shows the equivalent signaling circuits for the different signaling modes. 1-2 Overview VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction PBX E&M Interface -48VDC M Lead Condition M E On-Hook Off-Hook GND - 48VDC Open GND - 48VDC E Lead A. RS-464 Type I PBX E&M Interface - 48VDC M Lead SB Lead E Lead SG Lead -12 VDC -48 VDC* Condition M/SB E/SG On-Hook Off-Hook Open - 48VDC *E&M/EXT ordering option (-48 VDC requires external DC feed) Open GND B. RS-464 Type II - 48VDC PBX M Lead SB Lead E Lead SG Lead E&M Interface -12 VDC -48 VDC* Condition M/SB E/SG On-Hook Off-Hook Open - 48VDC *E&M/EXT ordering option (-48 VDC requires external DC feed) Open GND C. RS-464 Type III PBX 1.2 kω M Lead E& M Interface -12 VDC -48 VDC* Condition On-Hook Off-Hook M Open GND E Open GND - 48VDC E Lead 1.2 kω *E&M/EXT ordering option (-48 VDC requires external DC feed) D. RS-464 Type V, SSDC5 PBX M Lead E& M Interface +12 VDC Condition Idle Active M Open GND SG Open GND +5 VDC +12 VDC SG Lead E. E&M/POS Version (Type II only) PBX M Lead E&M Interface +24 VDC Condition M E Idle Open Active GND Open GND +24 VDC E Lead F. E&M/RJ/POS/24 Version LEGEND = Signaling Detector Circuit Figure 1-1. E&M Equivalent Signaling Circuits VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Overview 1-3

Chapter 1 Introduction Installation and Operation Manual The signaling type can be independently selected for each group of four channels (1, 2, 3, 4; 5, 6, 7, 8; etc.). EIA RS-464 Type I signaling standard is supported without any external power supply. EIA RS-464 Type II, III and V (BT SSDC5) signaling standards are supported by means of the internal -12 VDC power supply of the chassis. The -12 VDC voltage is suitable for most PBX systems. However, for full support of the EIA RS-464 Type II, III and V (BT SSDC5) signaling standards, a -48 VDC signaling voltage is required. For this purpose, a special E&M/EXT version can be ordered from RAD. A special E&M/POS version of VC-8 and VC-16 with positive signaling enables the module signaling operation at +5V or +12V (see Figure 1-1E). In this mode, the VC module sends signaling to the PBX by connecting GND to the SG lead. The E lead is permanently connected to GND and is not used. This version operates only with Type II Signaling. A special E&M/RJ/POS/24 version of VC-8 with positive signaling enables the module signaling operation at +24V (see Figure 1-1F). In this mode, the VC module sends signaling to the PBX by connecting GND to the E lead. The nominal voltage required for this version is -48 VDC. The -48 VDC voltage required for operating with E&M/EXT and E&M/RJ/POS/24 versions is always available when the Megaplex chassis is powered from a -48 VDC source. An AC-powered Megaplex-2100 or Megaplex-4100 chassis can be either equipped with a Ringer-2100R module, or can be connected to an external ringer unit, for example, the Ringer-2000 or Ringer-2200N units offered by RAD (see the appropriate Ringer Installation and Operation Manual for details). In addition, the AC-powered Megaplex-2104 chassis can be ordered with an internal ringer (/RI option). Note See Connecting the Signaling and Feed Voltage Source in Chapter 2 for details on DC power sources and connection methods. E&M Applications Figure 1-2 shows a basic E&M tie line application using VC-16/E&M modules. In this application, one VC-16/E&M module is used to provide 16 E&M tie lines between two analog PBXs through the E1 or T1 link interconnecting the Megaplex systems. VC-16/E&M VC-16/E&M E1 or T1 Link PBX 16 Tie Lines Megaplex Megaplex 16 Tie Lines PBX Figure 1-2. Basic Application for VC-16/E&M Modules 1-4 Overview VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction Figure 1-3 illustrates a typical air traffic control (ATC) system, where the E&M/POS modules enable to maintain constant contact between the ATC center and the airport radio stations situated at other remote locations. In this application, Megaplex allows communications between air traffic controllers and pilots and enables a broad range of ATC equipment connections, including intercom, telephone services and radar monitoring. Figure 1-3. Air Traffic Control using E&M/POS Modules Fault Propagation To notify the air traffic controller (local user) equipment that the main link loses synchronization, E&M channels of VC-8/E&M/RJ/POS/24 modules support fault propagation: when the main link loses synchronization, the attached in E&M channel sends an audio alert towards local user equipment. This audio alert is a busy tone of 1 KHz. Note If a test is activated on the E&M channel, while the channel is in under fault propagation and transmits the busy tone - the busy tone alert is stopped and the requested test is activated. Signaling Filter The E&M POS options have internal signaling filter to prevent false triggering of the VHF controllers/radios, when the uplink is noisy. The signaling is triggered only when the received E-bit is steady for 16ms-24ms. FXS and FXO Modules Characteristics and Applications The FXS and FXO modules are used to connect regular telephone sets (and other equipment with similar interface characteristics) to central office (PSTN) and PBX extension lines. FXS and FXO modules are intended for operation in a link, with the FXS module at the subscriber side and the FXO module at the central office or PBX side. However, FXS modules can also operate in a link with E&M modules. FXS Module Characteristics The FXS modules have 2-wire analog interfaces and support FXS loop-start signaling, for direct connection to subscriber telephone sets. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Overview 1-5

Chapter 1 Introduction Installation and Operation Manual The FXS modules also support wink-start signaling. For VC-4 and VC-8 modules, the selection is made for the entire group of the module channels. For VC-16/FXS modules, the signaling mode (loop-start or wink-start) can be independently selected for each group of eight channels (1 to 8 and 9 to 16). To enable wink-start signaling, the FXS modules support feed voltage (battery) polarity reversal. For direct connection to payphones, the FXS modules (special FXS/MET ordering options) also support metering pulse generation. The user can select the metering pulses frequency (12 khz or 16 khz). The FXS modules require -48 VDC to supply the subscriber feed and ring voltages. The ring voltage is generated on the module itself, by an internal ringer. The required voltage can be supplied via the internal supply voltage connector of the module, from the chassis voltage distribution bus (see Connecting the Signaling and Feed Voltage Source in Chapter 2 for details). In addition to -48 VDC, the VC-4/FXS and VC-8/FXS/RJ modules can also operate with -24 VDC. The VC-8/FXS and VC-16/FXS modules have a special ordering option for -24 VDC operation. Note FXS modules can supply the subscriber feed voltage from any DC input voltage in the range of -20 to -56 VDC. However, feed voltages lower than the nominal -48 VDC will reduce the loop span. For example, for -24 VDC feed voltage, the maximum loop span over typical local plant pairs is 1 km. FXO Module Characteristics The FXO modules have 2-wire analog interfaces and support FXO loop-start signaling for direct connection to central office and PBX extension lines. The FXO modules also support wink-start signaling. For VC-16/FXO modules, the signaling mode (loop-start or wink-start) can be independently selected for each group of eight channels (1 to 8 and 9 to 16). To enable wink-start signaling, the FXO module supports the detection of feed voltage (battery) polarity reversal. To permit connection to payphones, the FXO modules (special ordering options FXO/MET) also support metering pulse detection. The user can select the metering pulse detection frequency (12 khz or 16 khz). The FXO modules do not require any external supply voltage. Off-Premises Extension (OPX) Applications In a typical OPX application (see Figure 1-4), one FXO module located at the PBX side is used in a link with an FXS module to provide up to 16 off-premises extensions for an analog PBX connected to the FXO module channels. 1-6 Overview VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction VC-16/FXO Ringer-2100R VC-16/FXS 1 E1 or T1 Link FXS PBX Extension Lines Megaplex Megaplex 16 Figure 1-4. OPX Application for FXO and FXS Modules The system configuration shown in Figure 1-4 permits using telephones connected to the channels of an FXS module installed in the Megaplex unit located at the other end of the link as extensions of an analog PBX. Each remote telephone then becomes a regular local PBX subscriber, which can be dialed by other subscribers using standard procedures, and can also dial any other PBX subscriber and use all the services available to local PBX subscribers. Automatic Ringdown (PLAR) Applications Another application, which requires only FXS modules, is the private line with automatic ringdown (PLAR), also called hot line. In a PLAR or hot line application, telephone sets are connected to the channels of FXS modules installed in two different Megaplex units that are connected by an E1 or T1 link, as shown in Figure 1-5. For AC-powered Megaplex units, the subscriber feed voltage can be provided by Ringer-2100R modules installed in each Megaplex. 1 VC-16/FXS Ringer-2100R Ringer-2100R VC-16/FXS 1 FXS E1 or T1 Link FXS Megaplex Megaplex 16 16 Figure 1-5. PLAR Application for FXS Modules Each pair of telephones (local and remote) can then communicate directly without dialing: when one telephone goes off-hook, the other telephone rings. PSTN Access Applications Due to the flexible signaling configuration capabilities, the FXO modules can also be used on links ending in the public switched telephone network (PSTN). A typical PSTN access application is shown in Figure 1-6. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Overview 1-7

Chapter 1 Introduction Installation and Operation Manual Figure 1-6. PSTN Application for FXO Modules In the application shown in Figure 1-6, the extension lines of an analog PBX are connected to the channels of an FXO module, installed in a Megaplex unit connected to the PSTN through an E1 or T1 trunk line. This enables the PBX subscribers to dial PSTN subscribers through the Megaplex link, and PSTN subscribers can dial to PBX subscribers. Direct Inward Dialing (DID) Applications FXS and FXO modules support battery voltage polarity reversal for wink-start signaling, which is used in direct inward dialing (DID) applications. With DID, a PSTN subscriber first dials the number of one of the PBX external (trunk) lines, and after getting the PBX dial tone, can continue dialing the number of the desired PBX extension, without requiring the assistance of the PBX operator. Figure 1-7 shows a typical DID application. Figure 1-7. Wink-Start Trunk Extension for DID Application using FXO and FXS Modules As shown in Figure 1-7, the analog PBX trunk lines are connected to the PSTN through a Megaplex link. The FXO module channels connect to the PBX extensions, and the central office (PSTN switch) lines that use wink-start signaling are connected to the corresponding FXS module channels. 1-8 Overview VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction Payphone Applications Payphone applications use 12 khz or 16 khz pulses for metering line utilization. The FXO module supports the detection of 12 or 16 khz metering pulses at the central office or PBX side, and the FXS module supports the generation of 12 or 16 khz metering pulses, for direct connection to public payphones. Therefore, a Megaplex link can be used to connect payphones to a central office or PBX, as shown in Figure 1-8. 1 VC-16/FXO VC-16/FXS 1 E1/T1 FXS PBX Using Pulse Metering 16 FXO Megaplex Megaplex 16 Public Payphones Figure 1-8. Payphone Application using FXO and FXS Modules In the typical payphone application shown in Figure 1-8, an FXO module is installed at the PBX or central office side, and the public payphones are connected to an FXS module installed in the off-premises Megaplex. The remote payphone then becomes a regular local PBX subscriber, which can be dialed by other subscribers using standard procedures, and can also dial any other PBX subscriber, while transferring the metering signaling for billing purposes. Payphone applications are restricted to special ordering options. 1.2 Physical Description The VC modules occupy one module slot in the Megaplex chassis. All their characteristics are controlled by software. The module panels are described below. VC-16 Front Panels Figure 1-9 shows typical panels of VC-16 modules. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Physical Description 1-9

Chapter 1 Introduction Installation and Operation Manual VC-16 E&M VC-16 FXS VC-16 FXO Voice Channels 9 to 16 Connector CH 9-16 Voice Channel Connector (for all channels) Voice Channel Connector (for all channels) CH 1-8 Voice Channels 1 to 8 Connector VC-16/E&M VC-16/FXS VC-16/FXO Figure 1-9. VC-16 Module Panels There are no indicators on the VC-16 module panels, but only voice channel connectors. The VC-16/E&M modules have two 68-pin female SCSI connectors, one for voice channels 1 to 8 and the other for voice channels 9 to 16. VC-16/FXS and VC-16/FXO modules have one 50-pin female Telco connector, for connection of all the voice channels. 1-10 Physical Description VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction VC-8 and VC-8A Front Panels Figure 1-10 shows typical panels of VC-8 modules. VC-8 E&M VC-8 E&M/DS VC-8/RJ E&M VC-8 FXS VC-8 FXO VC-8/RJ FXS VC-8/RJ FXO CH 5-8 E M E M E M E M CH1 CH2 CH3 CH4 LOC LOC LOC LOC CH-1 CH-2 CH-3 CH-4 RING RING RING RING CH-1 CH-2 CH-3 CH-4 LOC RING CH 1-8 CH 1-4 E M E M E M E CH5 CH6 CH7 CH8 LOC LOC LOC CH-5 CH-6 CH-7 CH-8 RING RING RING CH-5 CH-6 CH-7 CH-8 M VC-8/E&M VC-8/E&M/DS VC-8/E&M/RJ/ POS/24 VC-8/FXS VC-8/FXO VC-8/RJ/FXS VC-8/RJ/FXO Figure 1-10. VC-8 Module Panels Figure 1-10 shows typical panels of VC-8A modules. VC-8A E&M VC-8A FXS VC-8A FXO LOC LOC LOC LOC CH-1 CH-2 CH-3 CH-4 RING RING RING RING CH-1 CH-2 CH-3 CH-4 CH 1-8 Voice Channel Connector (for all channels) LOC LOC LOC LOC CH-5 CH-6 CH-7 CH-8 RING RING RING RING CH-5 CH-6 CH-7 CH-8 VC-8A/E&M VC-8A/FXS VC-8A/FXO Figure 1-11. VC-8A Module Panels VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Physical Description 1-11

Chapter 1 Introduction Installation and Operation Manual The VC-8/E&M and VC-8A/E&M module interfaces have one 68-pin female SCSI connector. The VC-8/E&M/DS module interface has two 68-pin female SCSI connectors, for double signaling. The VC-8/E&M/RJ module interface is terminated in eight RJ-45 connectors one per channel. The VC-8 FXS and FXO modules have two modifications with different type of connectors: VC-8 and VC-8/RJ. In VC-8 modules, all the module channels are terminated in a 50-pin female Telco connector. The VC-8/RJ module interface and the VC-8A module interfaces are terminated in eight RJ-12 connectors one per channel. VC-4 and VC-4A Front Panels Figure 1-12 and Figure 1-13 show typical panels of VC-4 and VC-4A modules, respectively. The 4-channel E&M module interface is terminated in four RJ-45 connectors one per channel. The 4-channel FXS and FXO module interfaces are terminated in four RJ-12 connectors one per channel. VC-4 E&M VC-4 FXS VC-4 FXO E M E M E M E M CH1 CH2 CH3 CH4 LOC LOC LOC LOC CH1 CH2 CH3 CH4 RING RING RING RING CH1 CH2 CH3 CH4 VC-4/E&M VC-4/FXS Figure 1-12. VC-4 Module Panels VC-4/FXO 1-12 Physical Description VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction VC-4A E&M VC-4A FXS VC-4A FXO E M E M E M E M CH1 CH2 CH3 CH4 LOC LOC LOC LOC CH1 CH2 CH3 CH4 RING RING RING RING CH1 CH2 CH3 CH4 VC-4A/E&M VC-4A/FXS VC-4A/FXO Figure 1-13. VC-4A Module Panels 1.3 Functional Description Audio Channel Characteristics All the VC modules provide high-quality voice channels (the functional difference between the various modules being in the signaling interface and mode). The analog interface for the E&M modules is user-selectable for 2-wire or 4-wire; for the other versions, a 2-wire interface is always used. Voice encoding method for all VC-4A and VC-8A module versions is user-selectable for either toll-quality 64 kbps PCM or 32/24 kbps ADPCM. The VC-4, VC-8 and VC-16 modules feature only PCM encoding. The user can select the companding law, µ-law or A-law, in accordance with system requirements. In accordance with ITU-T Rec. G.711, the A-law should be used on E1 trunks and the µ-law should be used on T1 trunks. However, the user can select the desired companding law, µ-law or A-law, in accordance with the specific system requirements. To increase application flexibility, the nominal audio transmit and receive levels of all the module versions can be adjusted over a wide range. Due to the high quality audio reproduction, DTMF signaling is transparently transferred, inband. Therefore, the user can use DTMF signaling as usual, e.g., can operate the telephone set keypad to access voice mail systems, interactive systems, etc. The VC-4A and VC-8A modules use G.168 standard for echo cancellation (up to 4 ms per channel). VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Functional Description 1-13

Chapter 1 Introduction Installation and Operation Manual Timeslot Assignment VC-4, VC-8, VC-16 Modules The VC-4/8/16 modules use 64 kbps PCM encoding, and therefore require one uplink timeslot per voice channel. The user can freely route each voice channel to any uplink port. The voice channel data is provided in DS-0 (8 bits) compatible format, permitting voice channel routing by DACS cross-connect systems. VC-4A, VC-8A Modules The VC-4A/8A modules require one aggregate timeslot per voice channel in PCM mode, or one timeslot per pair of voice channels in ADPCM mode. The main link bandwidth required by a module depends on the encoding method, PCM or ADPCM: With PCM encoding, the modules require one main link timeslot, per voice channel, and provide the data in a DS-0 (8-bits) compatible format, permitting voice channel switching in a DACs-based cross-connect system. With ADPCM encoding, the module requires only one main link timeslot for each pair of voice channels. Note that consecutive channels (e.g. CH 1 2, 3 4, 15-16) must be assigned to share the same timeslot). System Capacity The maximum capacity of transmitting VC channels in a chassis depends on the following parameters: Chassis type (MP-2100, MP-2104, MP-4100) and its timeslot capacity The number and type of main links installed The number of free I/O slots for VC modules to be installed and the type of VC modules Operating mode (PCM or ADPCM). Table 1-1 displays the maximum number of channels supported by Megaplex-2100 and Megaplex-2104 in some optimal configurations. For a detailed description of the MP-2100/2104 main link module capabilities, refer to the ML-1E1/ML-2E1 and ML-1T1/ML-2T1 Installation and Operation Manuals. Table 1-1. Maximum Channels Supported by Megaplex-2100 and Megaplex-2104 Configurations Megaplex Chassis and Mode No. and Type of Links No. and Type of ML Installed No. and Type of VC Installed Max. no. of Channels Supported MP-2100 4 x E1 2 x ML-2E1 7 x VC-16 + 1 x VC-8 120 PCM 4 x T1 2 x ML-2T1 6 x VC-16 96 MP-2100 2 x E1 1 x ML-2E1 11 x VC-8A 88 ADPCM 2 x T1 1 x ML-2T1 11 x VC-8A 88 1-14 Functional Description VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction Megaplex Chassis and Mode No. and Type of Links No. and Type of ML Installed No. and Type of VC Installed Max. no. of Channels Supported MP-2104 2 x E1 1 x ML-2E1 4 x VC-16 60 PCM 2 x T1 1 x ML-2T1 3 x VC-16 48 MP-2104 1 x E1 1 x ML-1E1 4 x VC-8A 32 ADPCM 1 x T1 1 x ML-1T1 4 x VC-8A 32 The maximum MP-4100 chassis capacity is equivalent to 63 E1 or 84 T1 trunks. Broadcast Applications In addition to the normal (bidirectional) mode of operation, the VC modules support the unidirectional broadcast mode. For a description of these modes, refer to the corresponding Megaplex Installation and Operation Manual. Handling of Signaling Information Legacy Main Link Mode The VC modules automatically adapt the generation and interpretation of the signaling information to their analog interface type (E&M, FXS or FXO) and to the signaling mode selected by the user (loop-start or wink-start). The VC modules also permit flexible configuration of the signaling mode. The signaling format, down to the level of the individual bits in the channel signaling information word, can be modified by defining signaling profiles and then selecting the desired profile per link or per timeslot on the main link port serving the VC module. The following sections describe the handling of the signaling information in MP-4100 and when using the legacy main link service mode in MP-2100/2104. Signaling Methods You can select the format of the signaling information generated by VC modules in accordance with the application requirements. The signaling information of each channel is carried by means of up to four bits (signaling bits), designated by the applicable standards as bits A, B, C, and D. The number of bits actually available for carrying signaling information, and the data rate at which signaling information can be transferred depend on the main link type (E1 or T1), the framing mode and the encoding type (PCM or ADPCM) being used: For E1 trunks with G.732N framing, no signaling information is transmitted. For E1 trunks with G.732S framing, which use a 16-frame multiframe structure, the standard signaling method is Channel Associated Signaling (CAS). In the PCM mode, timeslot 16 carries four signaling bits for each payload timeslot. In ADPCM mode two signaling bits are available for each channel. For T1 trunks with ESF framing, which use a 24-frame multiframe structure, the standard signaling method is inband Robbed Bit Multiframe (RBMF) VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Functional Description 1-15

Chapter 1 Introduction Installation and Operation Manual signaling. The ESF multiframe structure includes four signaling bits for each payload timeslot. When this method is used, the least significant bit of each channel is periodically overwritten with signaling information. In ADPCM mode two signaling bits are available for each channel. T1 trunks with SF (D4) framing, which use a 12-frame multiframe structure, also use the RBMF signaling method. Because of the shorter multiframe structure, in this case only two signaling bits (A and B) are available for each payload timeslot. In ADPCM mode only one signaling bit is available for each channel. RAD Proprietary Robbed Bit Frame (RBF) signaling, applicable for both E1 and T1 trunks, avoids the need for multiframe synchronization. This method allocates the least significant bit of each channel to its own signaling information. Therefore, signaling is transparently transferred within the timeslot carrying the encoded audio signal, but because PCM encoding is effectively done with 7-bit resolution, there is a slight decrease in transmission quality. This proprietary method (used for VC-4A and VC-8A modules only) allows the transmission of 31 voice channels by a Megaplex system with E1 links, when using G.732N framing. For applications which do not require end-to-end signaling, or can use only inband signaling, e.g., DTMF, the user can disable the transfer of signaling information. For your convenience, Table 1-2 lists the number of signaling bits as a function of voice encoding and framing method. Table 1-2. Number of Available Signaling Bits Voice Signaling Type E1 Main Link T1 Main Link Encoding G.732S G.732N ESF SF (D4) PCM CAS 4 Not supported Not supported Not supported Robbed Bit Multiframe (RBMF) Not supported Not supported 4 2 Robbed Bit Frame (RBF) 1 1 1 1 ADPCM CAS 2 Not supported Not supported Not supported Robbed Bit Multiframe (RBMF) Not supported Not supported 2 1 Robbed Bit Frame (RBF) 1 1 1 1 Signaling for ADPCM Mode The signaling is slightly different when using ADPCM voice encoding: E1 used as main link timeslot 16 consists of four bits A, B, C, D (as in PCM) for a specific timeslot. However, since in ADPCM mode each channel requires only half a timeslot, the first two bits serve the first channel and the last two bits serve the second channel. 1-16 Functional Description VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction A B A B A B A B CH1 TS1 CH2 CH(N) CH(N+1) TS17 T1 used as main link - The A, B, C and D bits of each channel are transmitted through the following frames: ESF Framing: 6,12,18 and 24. Each channel has two signaling bits. SF Framing: 6 and 12 only. Each channel has a single signaling bit. A B A B CH1 CH1 CH2 CH2 Frame 6 Frame 12 Frame 18 Frame 24 In ESF Mode Only Note When VC modules operate in ADPCM mode and RBMF signaling with T1 links in the SF framing mode, the Tx/Rx Translation of the main link module must be configured in accordance with Table 1-8. Signaling Information The signaling information exchanged by the channels of VC modules is used for the following purposes: Determine the state of the E and M leads Report the detection of on-hook/off-hook conditions, and control DC closure across the line Report the detection of ringing and control the sending of ringing Control the generation and detection of feed voltage polarity reversal (PCM mode only) Control the generation and detection of metering pulses (PCM mode only) Each type of VC module generates and interprets signaling information in accordance with the analog interface type (E&M, FXS or FXO) and the signaling mode selected by the user (loop-start or wink-start). The format of the signaling information generated by a VC module operating in the PCM mode, which depends on the analog interface type (E&M, FXS or FXO) and the signaling mode (loop-start or wink-start), is given in Table 1-3, Table 1-4 and Table 1-5. The identification of the signaling bit states is consistent with the Megaplex default profile designations. Table 1-6 shows the default signaling bit states for E&M/DS modules. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Functional Description 1-17

Chapter 1 Introduction Installation and Operation Manual Table 1-3. Default Signaling Bit States for E&M Modules (PCM mode) Direction Analog Interface State Signaling Bits A B C D Tx Rx On-Hook 0 1 0 1 Off-Hook 1 1 0 1 Ring 1 X X X No Ring 0 X X X Table 1-4. Default Signaling Bit States for FXS Modules (PCM mode) Signaling Mode Direction Analog Interface State Signaling Bits A B C D Loop Start Wink Start Tx Rx Tx Rx On-Hook 0 1 0 1 Off-Hook 1 1 0 1 Ring 1 X X X No Ring 0 X X X On-Hook 0 1 0 1 Off-Hook 1 1 0 1 Ring 1 X No Ring 0 X Reversed Polarity 0 0 X Not Reversed Polarity 1 0 X Metering Pulse 1 1 X No Metering Pulse 1 0 X 1-18 Functional Description VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction Table 1-5. Default Signaling Bit States for FXO Modules (PCM mode) Signaling Mode Direction Analog Interface State Signaling Bits A B C D Loop Start Wink Start Tx Rx Tx Rx No Ring 0 1 0 1 Ring Detected 1 1 0 1 Remote On-Hook 0 X X X Remote Off-Hook 1 X X X No Ring 0 1 Ring Detected 1 1 Reversed Polarity 0 0 1 Not Reversed Polarity 1 0 1 Metering Pulse 1 1 1 No Metering Pulse 1 0 1 Remote On-Hook 0 X X X Remote Off-Hook 1 X X X Table 1-6. Default Signaling Bit States for E&M/DS Modules Direction Analog Interface State Signaling Bits A B C D Tx E&M 1 Tx E&M 2 Rx E&M 1 Rx E&M 2 Idle 0 0 0 1 Active 1 0 0 1 Idle 0 0 0 1 Active 0 1 0 1 Active 1 X X X Idle 0 X X X Active X 1 X X Idle X 0 X X Notes In the tables above, X indicates that the corresponding bit is not relevant. In Table 1-6, E&M 1 and E&M 2 signaling bits are independent. In most applications, the user need not be concerned with the issue of signaling information. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Functional Description 1-19

Chapter 1 Introduction Installation and Operation Manual Signaling Profiles The additional flexibility needed to meet the requirements of special applications is provided by means of signaling profiles, which control the processing of signaling information received and transmitted by each uplink: A signaling profile enables the user to select the translation of each individual signaling bit. The available selections are A, B, C, D (value copied from the corresponding incoming bit), ~A, ~B, ~C, ~D (inverted value of corresponding incoming bit), 0 (always 0), and 1 (always 1). In addition to the translation of individual bits, the receive path conversion section can also be used to define the signaling bit patterns that indicate the busy and idle states. Table 1-7. Signaling Bits for VC Modules in ADPCM Mode Direction Analog Interface Digital Signaling Bits A 1 B 1 A 2 B 2 Tx On-Hook 0 1 0 1 Off-Hook 1 1 1 1 Rx Ring 1 x 1 x No-Ring 0 x 0 x Signaling Profile Translation for T1 Links in ADPCM Mode When VC-4A and VC-8A modules operate in ADPCM mode with T1 links in the SF framing mode with RBMF signaling, the Tx/Rx Translation of the main link module must be configured in accordance with Table 1-8. Table 1-8. T1/SF Link Signaling Profile for Working with ADPCM Modules Rx Translation Tx Translation A B C D A B C D A B B D A C C D Signaling Feedback Certain types of PBX and central office switches require confirmation that the signaling information has been received, a function referred to as signaling feedback. Signaling feedback can be enabled only for FXO modules. For VC-4, VC-4A, VC-8 and VC-8A modules, the selection is made for the entire group of all the module channels. For VC-16/FXO modules, the function can be separately enabled on each group of eight channels (1 to 8 and 9 to 16). OOS Signaling In case the communication between modules located in different Megaplex units fails, e.g., because loss of main link synchronization, etc., it is necessary to control the state of the signaling information at the two ends of the link. This 1-20 Functional Description VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction activity, called out-of-service (OOS) signaling, is performed by the main link modules and can be selected in accordance with the specific application requirements, on a per-link basis. The OOS signaling options supported by the main link modules are as follows: Signaling forced to the idle state for the duration of the out-of-service condition (forced idle). This option is suitable for use with all the VC module types. Signaling forced to the busy state for the duration of the out-of-service condition (forced busy). This option is suitable for use with E&M and FXO modules, but not with FXS modules. Signaling forced to the idle state for 2.5 seconds, and then changed to the busy state for the remaining duration of the out-of-service condition (idle-busy). This option is suitable for use with E&M and FXO modules, but not with FXS modules. Signaling forced to the busy state for 2.5 seconds, and then changed to the idle state for the remaining duration of the out-of-service condition (busy-idle). This option is suitable for use with all the VC module types. Configuration and Management All the module operational parameters (including the E&M signaling type) are controlled by means of the Megaplex system management. Test and Diagnostic Capabilities For diagnostics purposes, the modules support a wide range of tests and loopbacks. The supported diagnostic features include: Local digital loopback per channel towards local analog side. Remote digital loopback per channel towards remote side. Tone injection. This function sends a 1 khz tone at the nominal channel transmit level (0 dbm0) towards the remote side. This function enables the user to check rapidly and efficiently the link to the remote equipment and its connection to the remote module channel. Backward tone injection. This function sends a 1 khz tone at the nominal channel transmit level (0 dbm0) towards the local user s equipment connected to the channel. This function enables the user to check rapidly and efficiently the local equipment and its connection to the module channel. The user can request that a loopback or test tone injection be automatically deactivated after a user-selected interval, thereby reducing the management workload during system troubleshooting. To facilitate troubleshooting in MP-2100/2104, the signaling information of any module channel can be displayed by means of a dedicated command, DSP SIG TS. This command displays the state of the received and transmitted signaling bits. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Functional Description 1-21

Chapter 1 Introduction Installation and Operation Manual 1.4 Technical Specifications Number of VC-4, VC-4A 4 Channels VC-8, VC-8A 8 VC-16 16 Voice Processing Modulation Technique PCM: per ITU-T Rec. G.711 and AT&T Pub. 43801 ADPCM: per ITU-T G.726 and G.727 Echo Cancellation 4 ms per channel as per G.168 Bandwidth Requirements Analog Interface Companding PCM ADPCM Interface Type E&M µ-law or A-law (user-selectable) 64 kbps per enabled channel (one timeslot) 32 kbps per enabled channel (one timeslot per pair of channels) as per G.726 24 kbps per enabled channel (one timeslot per pair of channels) as per G.727 4-wire or 2-wire (user-selectable) Note: A special 4-wire version with enhanced gain control (see Table 1-9) is available. FXS, FXO 2-wire Compliance ITU-T Rec. G.712 Analog Parameters Nominal Level 0 dbm Nominal Impedance Return Loss (ERL) at 300 to 3400 Hz Frequency Response (Ref: 1020 Hz) Transmit and Receive Levels Signal to Total Distortion Using ITU-T Rec. G.712 (8-bit PCM encoding) 600Ω Better than 20 db 0 db ±0.5 db, at 300 to 3000 Hz 0 db ±1.1 db, at 250 to 3400 Hz User-selectable in 0.5 db ±0.15 db steps, see Table 1-9. -30 to 0 dbm0: better than 33 db -45 to +3 dbm0: better than 22 db 1-22 Technical Specifications VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction Idle Channel Noise Transformer Isolation Better than -65 dbm0 (+20 dbrnc) 1500 VRMS Table 1-9. Transmit and Receive Levels for Various Interfaces Module Interface Transmit [dbm] Receive [dbm] min max min max E&M regular -10 +5-17 +2 E&M 4W enhanced -17 +5-17 +9 FXS -5 +5-17 +1 FXO -3.5 +5-17 +1 E&M Interface Characteristics FXS Interface Characteristics Signaling Method (User-Selectable) Dial Pulse Distortion Signaling Modes On-Hook/Off-Hook Threshold (VIN = -20 to -54 VDC) EIA RS-464 Type I EIA RS-464 Type II, III and V (British Telecom SSDC5) using internal -12 VDC in place of -48 VDC Note: For full support of Types II, III, and V (SSDC5) signaling standards and of RJ/POS/24 signaling, a nominal -48 VDC supply is required. See Chapter 2 for details. ±2 msec max EIA RS-464 loop-start and wink-start, user-selectable Off-hook state: 3V to 80% V in between tip and ring On-hook state: more than 83% V in between tip and ring Feed Current 24 ma (±10%) Ringer Characteristics 54 VRMS with up to 1 REN load 45 VRMS with up to 5 REN load Protected against overload 22 Hz (±10%) 1 second ON, 3 seconds OFF Metering Pulse 12 khz or 16 khz (±2 Hz), user-selectable Generation (PCM only, 1.7 VRMS special ordering options) VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Technical Specifications 1-23

Chapter 1 Introduction Installation and Operation Manual FXO Interface Characteristics Reversal Polarity Pulse Distortion Signaling Modes DC Resistance Ring Detector Detection Thresholds Metering Pulse Detection Frequency (PCM only, special ordering options) Reversal Polarity Pulse Distortion 6 msec max EIA RS-464 loop-start and wink-start, user-selectable Off-hook: 100 Ω at 100 ma feed, 230 Ω at 25 ma feed. On-hook: more than 1 MΩ 20 kω for 70 VRMS, 20 Hz ring signal Detection: > 20 VRMS, 17 to 25Hz No detection: < 5 VRMS 12 khz or 16 khz (±200 Hz), user-selectable 6 msec max End-to-End T1 Uplinks User-selectable sampling rate: Signaling 667 samples per second with SF (D4) framing 333 samples per second with ESF framing Diagnostics Configuration E1 Uplinks User-selectable as per ITU-T Rec. G.704, para. 3.3.32 Local digital loopback for any channel towards the local user equipment Note: When working in the ADPCM mode, the local digital loopback towards the local user equipment is performed for each pair of consecutive channels (1-2, 3-4, etc.) Remote digital loopback for any channel towards the remote user equipment Forward test tone injection (1 khz, 0 dbm0) on any channel towards the remote user s equipment Backward test tone injection (1 khz, 0 dbm0) on any channel towards the local user s equipment Programmable via Megaplex system management 1-24 Technical Specifications VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 1 Introduction Connectors E&M Modules VC-4, VC-4A, VC-8/RJ/POS/24: RJ-45 connector for each channel VC-8, VC-8A: 68-pin female SCSI connector for all channels VC-8/DS: two 68-pin female SCSI connectors, one for channels 1 to 4 and the other for channels 5 to 8 VC-16: two 68-pin female SCSI connectors, one for channels 1 to 8 and the other for channels 9 to 16 FXO and FXS Modules VC-4, VC-4A, VC-8A, VC-8/RJ: RJ-12 connector for each channel VC-8, VC-16: One 50-pin female Telco connector for all channels Power Consumption See Table 1-10. Configuration Programmable via Megaplex system management Table 1-10. Power Consumption (in Watt) from Megaplex Power Supply (without -48 VDC) Module vs Interface Type FXS FXO E&M VC-4 2.5 1.9 2.8 VC-4A 3.3 2.7 3.6 VC-8 2.8 2.0 3.4 VC-8A 3.7 2.8 4.2 VC-16 4.7 2.5 5.2 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x) Technical Specifications 1-25

Chapter 1 Introduction Installation and Operation Manual 1-26 Technical Specifications VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver 2.x)

Chapter 2 Installation and Operation 2.1 Introduction This chapter provides installation and operation instructions for the various types of VC modules. The information presented in this chapter supplements the general Megaplex installation, configuration and operation instructions contained in the corresponding Megaplex Installation and Operation Manual. Warning Before performing any internal settings, adjustment, maintenance, or repairs, first disconnect all the cables from the module, and then remove the module from the Megaplex chassis. No internal settings, adjustment, maintenance, and repairs may be performed by either the operator or the user; such activities may be performed only by a skilled technician who is aware of the hazards involved. Always observe standard safety precautions during installation, operation, and maintenance of this product. Note The VC modules contain components sensitive to electrostatic discharge (ESD). To prevent ESD damage, always hold the module by its sides, and do not touch the module components or connectors. 2.2 Installing the Modules The VC modules do not include any internal user settings, and all their functions are programmable. Therefore, no preparations are required before installation. Refer to the system installation plan, and insert the module in the assigned I/O slot of the Megaplex chassis. The module starts operating as soon as it is plugged into an operating chassis. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) 2-1

Chapter 2 Installation and Operation Installation and Operation Manual Connector Data 2.3 Connecting the Cables E&M Module Connectors The VC-4/E&M and VC-4A/E&M module interfaces have four RJ-45 connectors. The VC-8/E&M, VC-8A/E&M and VC-16/E&M module interfaces have one or two SCSI connectors, respectively. Each group of VC-8/VC-8A/VC-16 eight channels is terminated in a 68-pin female SCSI connector located on the module panel. To connect these modules to user equipment by splitting a single VC-8/E&M or VC-16/E&M 68-pin SCSI connector, RAD offers the following cables described in Appendix A: CBL-KVF8/E&M family: CBL-KVF8/E&M, CBL-KVF8/E&M/4METER, CBL- KVF8/E&M/10METER, CBL-KVF8/E&M/12METER, CBL-KVF8/E&M/25METER Cables with 8 x RJ-45 connectors, 2m, 4m, 10m, 12m, 25m long respectively CBL-KVF8/E&M/OPEN family: CBL-KVF8/E&M/OPEN, CBL- KVF8/E&M/OPEN/4METER, CBL-KVF8/E&M/OPEN/10METER, CBL- KVF8/E&M/OPEN/12METER, CBL-KVF8/E&M/OPEN/25METER Open-end cables with stranded core, 2m, 4m, 10m, 12m, 25m long respectively CBL-KVF8/E&M/OPEN/SOLID/12METER Open-end cable with solid core, 12m long. The two special VC-8 options have interfaces different from the regular ones: VC-8/E&M/DS module interface has two 68-pin female SCSI connectors one per 4-channel group. VC-8/E&M/RJ module interface is terminated in eight RJ-45 connectors one per channel. FXS and FXO Module Connectors The FXS and FXO versions of VC-8 have two modifications with different types of connectors: VC-8 and VC-8/RJ. The VC-4, VC-4A, VC-8A and VC-8/RJ module interface is terminated in four or eight RJ-12 connectors one per channel. In the VC-16 and VC-8 modules, all the module channels are terminated in a 50-pin female TELCO connector. RAD offers two adapter cables terminated in RJ-12 male connectors, for direct connection of the individual channels to the user s equipment: CBL-VC16/FXSO, intended for use with VC-16/FXS and VC-16/FXO modules, which is terminated in 16 RJ-12 male connectors CBL-VC8/FXSO, intended for use with VC-8/FXS and VC-8/FXO modules, which is terminated in 8 RJ-12 male connectors. For connector and cable wiring, refer to Appendix A. 2-2 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Installation and Operation Manual Chapter 2 Installation and Operation Ferrite Cores In harsh environments, such as heavy industry or electrical switching stations, it is recommended to use ferrite cores in order to reduce the effect of electromagnetic interference. The recommended ferrite core depends on the connector cable type. For modules with RJ-12 connectors for each channel (VC-4, VC-4A, VC-8A, VC-8/RJ) use FAIR RITE catalog number 0443167251 or equivalent for small-diameter cables. The ferrite core should be installed on the cable close to the RJ-12 connector as shown below: For modules with a single 50-pin female Telco connector for all channels (VC-8, VC-16) use FAIR RITE catalog number 0444173551 or equivalent. The ferrite core should be installed on the main cable as shown below: To install the ferrite core on FXS/FXO modules: 1. Run the cable through the open core. 2. If cable thickness allows, wrap it around the core and run it through again. Allow no more than 2 inches (5 cm) between the core and the cable connector to the unit. 3. Snap the core shut. 4. Connect the cables to the appropriate connectors. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) Connecting the Cables 2-3

Chapter 2 Installation and Operation Installation and Operation Manual Connecting the Cables to Module Connector Identify the cables intended for connection to each module connector, and connect them into the appropriate connectors. Caution When using a CBL-KVF8/E&M, CBL-VC16/FXSO or CBL-VC8/FXSO cable, pay attention not to touch the exposed contacts of RJ-45 or RJ-12 connectors. When using any of the adapter cables listed above, plug each channel connector at the other end of the cable into the prescribed user s equipment connector, in accordance with the site installation plan. Caution The E&M module ports have a HARDWARE default corresponding to EIA RS-464 type III signaling circuits (see diagram in Figure 1-1). When the chassis is not powered and/or the module ports are not open, the module takes automatically this configuration. Using these modules for alternative applications (other than shown in Figure 1-1) may result in a module failure or even damage. Connecting the Signaling and Feed Voltage Source Note Review Section 1.1 for a description of subscriber feed considerations. The subscriber feed voltage used by FXS modules, or the -48 VDC signaling battery voltage used by E&M/EXT modules for full compliance with the EIA RS-464 Type II, III and V (BT SSDC5) signaling standards is supplied to the VC-16 module from the chassis DC power distribution bus. The required -48 VDC voltage is always available when the Megaplex chassis is powered from a -48 VDC source. An AC-powered Megaplex-2100 or Megaplex-4100 chassis can be either equipped with a Ringer-2100R module, or can be connected to an external ringer unit, for example, the Ringer-2000 or Ringer-2200N units offered by RAD (see the appropriate Ringer Installation and Operation Manual for details). In addition, the AC-powered Megaplex-2104 chassis can be ordered with an internal ringer (/RI option). The Ringer-2100R module supports up to 40 concurrently active VC channels. Ringer-2200N can support up to 200 active channels; when the maximum number of active channels does not exceed 100, the Ringer-2000 can also be used. Caution Since an external voltage source can supply voltage even when the Megaplex is not operating, observe the following precautions: 1. Always turn off the external source (for example, Ringer-2000), before the Megaplex chassis is turned off. 2. Never connect external DC voltages to modules installed in a Megaplex chassis if it is not operating. 3. Do not connect/disconnect the ringer while it is operating. For connection instructions, refer to the Installation and Operation Manual of the appropriate Ringer. 2-4 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Chapter 3 Configuration 3.1 Overview This chapter provides configuration information for VC modules installed in the Megaplex-2100/2104 or Megaplex-4100 chassis. For general instructions and additional configuration procedures, refer to Megaplex-2100/2104 Installation and Operation Manual and Megaplex-4100 Installation and Operation Manual, respectively. The configuration is performed by means of the management system used to control the Megaplex unit: Supervision terminal or Telnet refer to the Megaplex-2100/2104 or Megaplex-4100 Installation and Operation Manual for instructions. Web browser refer to the Megaplex-4100 Installation and Operation Manual for instructions. Network management system, e.g., the RADview network management system refer to the RADview User's Manual for instructions. 3.2 Configuration Sequence for the MP-2100/2104 Chassis To configure a VC module and put it into service: 1. Add a VC module not yet installed in the Megaplex-2100/2104 chassis to the database. This allows preconfiguring the module parameters, so that the module will immediately start operating in the desired mode as soon as it is installed in the enclosure. For the supervision terminal, use the DEF SYS command. 2. Configure the VC parameters: To define the general module parameters on the supervision terminal, type the command: DEF CH SS To define the parameters of a desired channel on the supervision terminal, type the command: DEF CH SS CC VC-4/4A/8/8A/VC-16 MP-2100/2104/MP-4100 (ver 2.x) 3-1

Chapter 3 Configuration Installation and Operation Manual To define the general module parameters and parameters of all the module channels on the supervision terminal, type the command: DEF CH SS * where SS is the slot number, and CC is the channel number (1 to 4 for VC-4 and VC-4A, 1 to 8 for VC-8 and VC-8A, 1 to 16 for VC-16). See Table 3-1 for the general module parameters and Table 3-2 for the channel parameters. Note 3. Configure the timeslot assignment of each module port as described in Section 3.5. Make sure to plan ahead the configuration sequence, because Megaplex databases can be updated only after correctly completing the configuration activities: any sanity error will prevent saving the changes to the database being modified. 3.3 Configuration Sequence for the MP-4100 Chassis Note To configure a VC module and put it into service: 1. Add a VC module not yet installed in the Megaplex-4100 chassis to the database. This allows preconfiguring the module parameters, so that the module will immediately start operating in the desired mode as soon as it is installed in the enclosure. For the supervision terminal, use the Configuration>System>Card Type screen. 2. Configure the CL or M8E1/M8T1 module port parameters (depending on the VC module application). For the configuration procedure, refer to the appropriate Installation and Operation Manual. 3. Configure the general module parameters. For the supervision terminal, use the Configuration>Physical Layer>I/O>[slot number]>card Configuration screen. 4. Configure the port parameters. For the supervision terminal, use the Configuration>Physical Layer >I/O>[slot number]>port # screen. 5. Configure the timeslot assignment of each module port, using the Configuration>System>TS Assignment screen. Make sure to plan ahead the configuration sequence, because Megaplex-4100 databases can be updated only after correctly completing the configuration activities: any sanity error will prevent saving the changes to the database being modified. 3-2 VC-4/4A/8/8A/VC-16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 3 Configuration 3.4 Configuration Parameters Each VC channel can be independently configured in accordance with the system requirements. In addition, there are configurable parameters that pertain to the entire VC module. General Module Parameters Table 3-1 explains the general programmable VC module parameters, and their range of values. Table 3-1. General Module Parameters Parameter Coding Signaling Description Specifies the companding law to be used by the voice channels: a LAW u LAW Default: a LAW A-law coding, intended for use on E1 links µ-law coding, intended for use on T1 links This field specifies the end-to-end signaling transfer method. The signaling transfer options depend on the type of main link module installed in the Megaplex chassis: With T1 link modules: NO Channel signaling is not transferred. RBMF Robbed bit signaling in accordance with AT&T Pub 43801. RBF Proprietary robbed bit signaling method that does not require multiframe synchronization (used for VC-4A and VC-8A modules only): 7-bit PCM with channel signaling carried by the 8th bit of each channel 3-bit ADPCM with channel signaling carried by the 4th bit of each channel when using G.727 With E1 link modules modules: CAS NO RBF Default: NO Channel-associated signaling in accordance with ITU-T Rec. G.704. Channel signaling is not transferred. Proprietary robbed bit signaling method that does not require multiframe synchronization (used for VC-4A and VC-8A modules only): 7-bit PCM with channel signaling carried by the 8th bit of each channel 3-bit ADPCM with channel signaling carried by the 4th bit of each channel when using G.727 VC-4/4A/8/8A/VC-16 MP-2100/2104/MP-4100 (ver 2.x) 3-3

Chapter 3 Configuration Installation and Operation Manual Parameter Encoding Metering Compress Method Signaling Services (MP-2100/2104 only) Description Specifies the voice encoding employed on all channels: PCM ADPCM Default: PCM 64 kbps rate per channel (1 timeslot) 32 kbps or 24 kbps rate per channel (½ timeslot). This option is supported only in VC-4A and VC-8A modules. Specifies the pulse metering frequency (supported only on FXS and FXO modules in PCM mode): N/A No support for metering pulses 16K 12K Default: 12K Support for 16 khz metering pulses Support for 12 khz metering pulses Specifies the compression method used in the ADPCM encoding. This option does not appear if PCM encoding is used. G.726 Compression as per ITU-T G.726. G.727 Compression as per ITU-T G.727. Always use this option when working with RBF or RBMF signaling. Default: G.726 Specifies the signaling services used by the module: NORMAL ADVANCED Default: NORMAL Normal signaling, used when module ports are connected to a main link port using legacy or R2 CAS signaling. Not relevant for the current version Channel Parameters Table 3-2 explains the programmable channel parameters, and their range of values. Each module channel can be independently configured, except for several parameters that can only be selected for groups of channels. These parameters are explicitly indicated in Table 3-2. 3-4 VC-4/4A/8/8A/VC-16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 3 Configuration Table 3-2. Channel Parameters Parameter Connect (MP-2100/2104 only) Admin Status (MP-4100 only) Transmit Level Receive Level Description Determines whether the channel is connected to the main link: NO YES Channel is disconnected. You can still program the desired parameters, so the channel will be ready for operation when needed. Channel is connected. V5.1 Not relevant for the current version. V5.2 Not relevant for the current version. Default: NO Used to enable/disable the flow of traffic through the selected port UP The flow of traffic is enabled. DOWN The flow of traffic is disabled. This state should be selected as long as the port configuration has not yet been completed, or when it is necessary to stop traffic flow through the port. Default: DOWN Selects the nominal input level of the transmit path. The input level can be set in 0.5 db steps in the range defined by Table 1-8 in Chapter 1. Select the transmit level to match the transmission level point (TLP-transmit) of the equipment connected to the channel. Figure 3-1 explains how to determine the required level setting. Note that the application of an input signal at the nominal transmit level results in a 0 dbm digital level, and a far-end output signal equal to the far-end nominal receive level Default: 0 dbm Selects the nominal output level of the receive path. The output level can be set in 0.5 db steps in the range defined by Table 1-8 in Chapter 1. Select the receive level to match the TLP-receive of the equipment connected to the channel (see Figure 3-1). VC Channel Transmit TLP: -8dB T R Transmit Input Circuit Nominal Level = 0 dbm Adjust level (Tx Gain) to -8dBm Signal Processor Receive TLP: -2dB T1 R1 Receive Output Circuit Adjust level (Rx Gain) to -2dBm Figure 3-1. Selection of Transmit and Receive Levels VC-4/4A/8/8A/VC-16 MP-2100/2104/MP-4100 (ver 2.x) 3-5

Chapter 3 Configuration Installation and Operation Manual Parameter Fault Propagation Disconnect Tone (FXS modules only) Wires Num Interface Sig Feed Type Description Enables/disables fault propagation by this port. This parameter is relevant for VC-8/E&M/POS/24 option only. The available selections are: Enable Disable Default: Disable Enables fault propagation. Disables fault propagation. Enabling the end of speech signal (short tones) on hanging up on the partner side: YES Disconnect tone enabled. NO Disconnect tone disabled. Default: NO Specifies the interface to be used by the voice channels: 4 WIRES 4-wire interface, available only for the E&M modules. Can be independently selected for each pair of channels (1, 2; 3, 4; etc.) 2 WIRES 2-wire interface. Default: 2 WIRES Specifies the signaling method used for all channels: LOOP START WINK START Loop start signaling Wink start signaling. Can be selected only for FXO and FXS modules operated in PCM mode. For VC-4, VC-4A, VC-8 and VC-8A modules, the selection is made for the entire group of all the module channels. For VC-16 modules, the selection can be separately made for each group of eight channels: 1 to 8 and 9 to 16. Default: LOOP START Controls the use of signaling feedback, an option available only for FXO modules. For VC-4, VC-4A, VC-8 and VC-8A, the selection is made for the entire group of all the module channels. For VC-16 modules, the selection can be separately made for each group of eight channels: 1 to 8 and 9 to 16. N/A Not available (the only option for E&M and FXS modules). NO YES Default: N/A Signaling feedback disabled. Signaling feedback enabled. Specifies the E&M signaling standard, an option available only for E&M modules. The E&M signaling type can be independently selected for each group of four channels 1, 2, 3, 4; 5, 6, 7, 8; etc.). TYPE 1 EIA RS-464 Type I signaling TYPE 2 EIA RS-464 Type II signaling TYPE 3 SSDC5 N/A EIA RS-464 Type III signaling BT SSDC5 signaling (similar to EIA RS-464 Type V signaling) Not applicable (displayed for FXS and FXO module channels) Default: SSDC5 Note: For the E&M/POS module, select TYPE 2 only. 3-6 VC-4/4A/8/8A/VC-16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 3 Configuration Parameter Echo Canceller Operation Mode ML Slot (MP-2100/2104 only) ML Channel (MP-2100/2104 only) Description Enables/disables the built-in adaptive echo canceller, which supports up to a 4 msec delay. This option is relevant only for VC-4A and VC-8A. YES NO Default: NO Echo canceller is enabled. Echo canceller is disabled. Selects the operating mode of the channel: BI-DIR UNI-BRD TX UNI-BRD RX Default: BI-DIR Bidirectional (normal) mode. Unidirectional broadcast transmit mode. This mode is not available for FXO modules. Unidirectional broadcast receive mode. This mode is not available for FXO modules. Selects the main link module to which the corresponding channel will be connected. The main link module is specified by indicating the number of the I/O slot in which the desired main link module is installed: IO-1 to IO-12. Default: IO-1 Selects the external port of the main link module, to which the corresponding channel will be connected. Default: EX1 Destination Slot (MP-4100 only) Destination Port (MP-4100 only) Map Type Specifies the module (I/O slot) to which the data stream handled by the port is routed. The available selections are the CL modules installed in the chassis, and I/O modules IO-1 to IO-10. Specifies the port to which the data stream handled by the port is routed. The available selections are 1 to 8 for external ports, or 1 to 63 (1 to 84) for internal (virtual) ports (actual range depends on the destination module). Selects the timeslot mapping method when the destination is a TDM main link or CL port. For a module installed in a MP-4100 chassis, this field appears only for the UNI-BRD RX mode. When using the BI-DIR and UNI-BRD TX modes, for a module installed in a MP-2100 chassis, this field automatically changes to N/A, to remind you that the destination must be selected using the DEF TS command When using the UNI-BRD RX or BID-BRD RX mode, you can select the desired mode: USER You can select the desired uplink timeslots on a timeslot map. SEQUENCE The channel is assigned consecutive timeslots, starting with the timeslot specified by means of the Start TS parameter. Default: N/A Start TS When using the SEQUENCE mapping mode, this field can be used to select the starting timeslot in the frame of the destination uplink port. The allowed range is 1 to 31 for E1 ports, and 1 to 24 for T1 ports. When using any other mode, this field automatically changes to N/A. Default: N/A VC-4/4A/8/8A/VC-16 MP-2100/2104/MP-4100 (ver 2.x) 3-7

Chapter 3 Configuration Installation and Operation Manual 3.5 Assigning Timeslots After performing the configuration of the individual module channels, it is necessary to assign the uplink bandwidth to each connected channel. When using the BI-DIR or UNI-BRD TX mode in the module installed in the MP-2100/2104 chassis, use the DEF TS command to assign a timeslot or DEF SPLIT TS A:B:C command to assign a fraction of a timeslot (ADPCM mode only), as explained in the Megaplex-2100 Installation and Operation Manual. For the module installed in the MP-4100 chassis, use the Configuration>System>TS Assignment screen. When using the UNI-BRD RX or BID-BRD RX mode in the module installed in the MP-2100/2104 chassis, timeslot assignment for the receive direction is made using the dedicated routing fields of the DEF CH command. When using the UNI-BRD RX mode in the module installed in the MP-4100 chassis, use the Configuration>Physical Layer>IO screen. 3.6 Displaying Status and Configuration Information The Megaplex-2100/2104 user can read the VC status and configuration information using the DSP ST CH command. For a general description of this command, refer to Chapter 5 of the Megaplex-2100/2104 Installation and Operation Manual. To display the general module parameters: Type the command DSP ST CH SS The system displays a data form similar to that displayed by the DEF CH SS command, showing the current general parameters. For a description of the displayed parameters, see Table 3-1. To display the parameters of a desired channel: Type the command DSP ST CH SS CC where SS is the slot number, and CC is the channel number (1 to 4 for VC-4 and VC-4A, 1 to 8 for VC-8 and VC-8A, 1 to 16 for VC-16). The command includes two sections: Hardware Config/Status: for E&M modules, displays the HW interface type (2&4 wires or 4 wire only), the signaling type and voltage and double signaling support (DS); for FXS or FXO modules, displays support for reverse polarity and pulse metering. Software Configuration: displays a data form similar to that displayed by the DEF CH SS CC command, showing the current channel parameters. For a description of the displayed parameters, see Table 3-2. 3-8 VC-4/4A/8/8A/VC-16 MP-2100/2104/MP-4100 (ver 2.x)

Installation and Operation Manual Chapter 3 Configuration To display both the general module parameters and parameters of all the module channels: Type the command DEF CH SS * The Megaplex-4100 user can read the configuration on every port of the I/O modules using the Configuration>Physical Layer >I/O menu. To display the VC hardware status, use the Monitoring>Physical Layer >I/O screen. For a general description of these menus, refer to Chapter 4 of the Megaplex-4100 Installation and Operation Manual. VC-4/4A/8/8A/VC-16 MP-2100/2104/MP-4100 (ver 2.x) 3-9

Chapter 3 Configuration Installation and Operation Manual 3-10 VC-4/4A/8/8A/VC-16 MP-2100/2104/MP-4100 (ver 2.x)

Chapter 4 Troubleshooting and Diagnostics 4.1 Introduction This chapter explains the module specific tests and diagnostic functions and provides troubleshooting instructions. For a description of the alarm and configuration ( sanity ) error messages generated by VC modules, refer to Chapter 6 of the Megaplex-2100/2104 Installation and Operation Manual or Chapter 6 of the Megaplex-4100 Installation and Operation Manual. The diagnostic information presented in this chapter supplements the general diagnostics and troubleshooting information instructions contained in the corresponding Megaplex Installation and Operation Manual. 4.2 Test and Diagnostic Functions The test and diagnostics functions available on each module channel are: Local digital loopback Remote digital loopback Forward tone injection Backward tone injection. The following sections describe the available diagnostic activities. When a test or loopback is activated, the user can also specify the time it remains active: the range is 1 through 30 minutes, in 1-minute steps. After the specified time, the test or loopback is automatically deactivated, thereby reducing the management workload during system troubleshooting. The default selection is continuous connection, that is, the test or loopback remain active until canceled by a user's command. Local Digital Loopback (Local Loop) The local loopback is a digital loopback performed at the digital output of a selected channel, by returning the transmit signal of the channel in the same VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) 4-1

Chapter 4 Troubleshooting and Diagnostics Installation and Operation Manual timeslot of the receive path. The transmit signal is still sent to the remote Megaplex unit. While the loopback is connected, the local voice channel should receive its own signal, e.g., a strong sidetone should be heard in the earpiece if the channel is connected to a telephone set. The signaling bits are not looped. The loopback signal path is shown in Figure 4-1. User or Test Equipment Channel 1........ VC-16 I/O Modules Local Unit Remote Unit VC-16 I/O Modules User or Test Equipment System Management Figure 4-1. Local Loopback, Signal Path Note When working in the ADPCM mode, the local digital loopback towards the local user equipment is performed for each pair of consecutive channels (1-2, 3-4, etc.) Remote Digital Loopback (Remote Loop) The remote loopback is a digital loopback performed at the digital input of the channel, by returning the digital received signal of the channel to the input of the transmit path. The receive signal remains connected to the local user, and can be received by user. While the loopback is connected, the remote voice channel should receive its own signal, e.g., a strong sidetone should be heard in the earpiece if the channel is connected to a telephone set. The recieved signaling bits (ABCD) are also looped. The loopback signal path is shown in Figure 4-2. 4-2 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Installation and Operation Manual Chapter 4 Troubleshooting and Diagnostics User or Test Equipment Channel 1......... VC-16 I/O Modules Local Unit Remote Unit VC-16 I/O Modules User or Test Equipment System Management Figure 4-2. Remote Loopback, Signal Path Forward Tone Injection The test tone is a data sequence repeating at a rate of 1 khz. This data sequence is identical to the data sequence that would have been generated if a 1-kHz signal having a nominal level of 1 mw (0 dbm0) were applied to the input of the channel codec. The tone is injected to the local transmit path multiplexer, instead of the transmit signal of the channel. The signal received from the other end remains connected to the local subscriber. While the forward tone injection is activated, the remote user should hear the tone in the earpiece if the channel is connected to a telephone set. Figure 4-3 shows the signal path. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) Test and Diagnostic Functions 4-3

Chapter 4 Troubleshooting and Diagnostics Installation and Operation Manual User or Test Equipment Channel 1......... ~ Test Tone VC-16 I/O Modules Local Unit Remote Unit VC-16 I/O Modules User or Test Equipment System Management Figure 4-3. Forward Test Tone Injection Path Backward Tone Injection When the backward test tone injection is enabled, the test tone (a data sequence repeating at a rate of 1 khz) is injected to the local receive input of the channel decoder, instead of the received signal of the channel, and the resulting analog signal is supplied to the local subscriber. The signal received from the other end is disconnected from the local subscriber. While the backward tone injection is activated, the local user should hear the tone in the earpiece if the channel is connected to a telephone set. Figure 4-4 shows the signal path. 4-4 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Installation and Operation Manual Chapter 4 Troubleshooting and Diagnostics User or Test Equipment Channel 1......... Test Tone VC-16 I/O Modules Local Unit Remote Unit VC-16 I/O Modules User or Test Equipment System Management Figure 4-4. Backward Test Tone Injection Path 4.3 Troubleshooting The test tone injection functions and the loopbacks available on the VC module provide a rapid and efficient way to identify the general location of a fault at either of the two VC modules connected in a link, in the external equipment, or in the connections to the channels. If a complaint is received from one of the subscribers connected to the VC channels, first activate the VC local test loop at the side where the complaint is received from. The local subscriber must receive its own signal. If the signal is not received, the problem is at the local end: Check the connections to the subscriber equipment. Replace the local VC module. If the local subscriber receives its own signal when the local loop is activated, activate test tone injection toward the complaining subscriber. If the subscriber receives the test tone, the problem is probably in the connections at the remote side (the side that sends the tone). You can check the computer path of the remote module channel by activating the remote loopback and the tone injection toward the remote subscriber, and checking that the local subscriber receives the test tone. If the problem is not corrected, the procedure must be repeated at the other side of the link. Deactivate the local loop and activate the remote loop on the remote Megaplex unit. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) Troubleshooting 4-5

Chapter 4 Troubleshooting and Diagnostics Installation and Operation Manual 4.4 Frequently Asked Questions Q: What is the maximum external modem speed supported by the FXS modules? A: The FXS modules support the connection of an external modem up to 33.6 kbps when working in the PCM mode and up to 16.8 kbps when working in the ADPCM mode. Q: What is the current provided by the FXS voice channel during an incoming call? A: 22mA in off-hook, and 10mA to 15mA during the ringing. Q: For how many VC-16/FXS modules can a built-in ringer of MP-2104/AC/RI provide -48Vpower? A: Recently we released a new built-in Ringer for the MP-2104/AC/RI (with a new Configuration Status Letter "N"), which can support up to 60 x FXS channels, i.e. 4 x VC16/FXS modules. However, customer that has a chassis with Configuration Status Letter "M", than due to the -48V consumption, only two VC-16/FXS modules could be supported. (A built-in ringer of MP-2104/AC/RI can provide up to 1.2A, whereas a MP-2100M-VC-16/FXS module consumes 500 ma). Q: How many VC/FXS modules does the Ringer support? Which Ringer is recommended? A: The Ringer-2100R module supports up to 40 concurrently active VC channels. Ringer-2200N can support up to 200 active channels; when the maximum number of active channels does not exceed 100, the Ringer-2000 can also be used. Q: Can the VF-24/30/48/60 modules work with the VC modules in the same MP-2100 chassis? A: Yes. Moreover, the new VFS-24/30/48/60 voice compression server modules available from MP-2100/2104 ver. 12 allow direct VC module connection, without the need of an additional E1/T1 main link module. Q: Can VC modules transfer SMS messages? A: VC-4, VC-8 and VC-16 succeed to transfer the SMS message from the DECT phone toward the cellular and vice versa. Today some of the PSTN companies support sending and receiving SMS messages. The SMS message is sent and received when the telephone is in on-hook state. The telephones that support this feature are cordless phones that support the DECT protocol. VC-4A and VC-8A do not support transferring SMS messages. Q: Do VC modules support the 'Message Waiting' LED indicator? A: No. 4-6 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Installation and Operation Manual Chapter 4 Troubleshooting and Diagnostics Q: When installed in the MP-4100 chassis, do the VC-4/4A/8/8A/16 modules operate exactly the same as when installed in the MP-2100/2104 chassis? A: Yes, they do. Most of the differences between the two module locations are purely chassis/common logic related (command line vs menu interface, main link vs CL or I/O ports as timeslot destinations, etc.) Also, the bidirectional broadcast mode (BID-BRD RX) is not available for the modules operating in the Megaplex-4100 chassis. Q A Is it possible to work with VC FXS modules in a MP-2100/2104 chassis working with positive DC voltage? No. One important limitation of positive DC voltage operation, i.e. frame chassis (FGND) in shortcut with the negative pole of the battery, is that VC/FXS cards cannot be used. If FXS modules are needed, then the DC-powered Megaplex must work either with negative DC voltage or in floating ground. To obtain fully floating ground for MP-2100: Set the GND=FGND jumper of the power supply NO. Set the BGND=FGND jumper of the power supplies to NO. Order all the modules with floating ground as well (the CL.2 and ML-xE1 modules are by default floating ground). To obtain fully floating ground for MP-2104: Order the /FLG option. Order all the modules with floating ground as well (the CL.2 and ML-xE1 modules are by default floating ground). 4.5 Technical Support Technical support for this product can be obtained from the local partner from whom it was purchased. RADcare Global Professional Services offers a wide variety of service, support and training options, including expert consulting and troubleshooting assistance, online tools, regular training programs, and various equipment coverage options. For further information, please contact the RAD partner nearest you or one of RAD's offices worldwide. RAD Data Communications would like your help in improving its product documentation. Please send us an e-mail with your comments. Thank you for your assistance! VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) Technical Support 4-7

Chapter 4 Troubleshooting and Diagnostics Installation and Operation Manual 4-8 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Appendix A Pinouts A.1 E&M Module Connectors The VC-4/E&M and VC-4A/E&M module interfaces have four RJ-45 connectors. The VC-8/E&M, VC-8A/E&M and VC-16/E&M module interfaces have one or two SCSI connectors, respectively. RJ-45 Connectors Table A-1 lists the wiring of the RJ-45 connectors used for the VC-4/E&M and VC-4A/E&M modules. Table A-1. RJ-45 Connector Wiring Pin Designation Function 1 SB Signaling battery 2 M M lead input 3 R1-OUT Voice output (4W) Voice input/output (2W) 4 R-IN Voice input (4W) 5 T-IN Voice input (4W) 6 T1-OUT Voice output (4W) Voice input/output (2W) 7 SG Function depends on signaling mode: 8 E E lead output RS-464 Type I, III: Direct connection to signal ground RS-464 Type V, SSDC5: Connection to signal ground through 1.2 kω resistor RS-464 Type II: SG lead SCSI Connectors Each group of VC-8/VC-8A/VC-16 eight channels is terminated in a 68-pin female SCSI connector located on the module panel. For connector pinout, see Adapter Cables below. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) E&M Module Connectors A-1

Appendix A Pinouts Installation and Operation Manual A special VC-8/E&M/DS module has two SCSI 68-pin connectors. Table A-2 lists the connector pinout, together with functions of the individual connector pins. Table A-2. VC-8/E&M/DS SCSI Connector Pinout Channel 68-Pin SCSI Designation Function 1, 5 37 SB1 Signaling Battery 38 M1 M Lead Input 1 R-IN Voice Input (4-wire) 2 T-IN Voice Input (4-wire) 3 R1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 4 T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 35 SG1 Signaling Ground 36 E1 E Lead Output 61 SB2 Signaling Battery 62 M2 M Lead Input 59 SG2 Signaling Ground 60 E2 E Lead Output 2, 6 43 SB1 Signaling Battery 44 M1 M Lead Input 7 R-IN Voice Input (4-wire) 8 T-IN Voice Input (4-wire) 9 R1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 10 T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 41 SG1 Signaling Ground 42 E1 E Lead Output 67 SB2 Signaling Battery 68 M2 M Lead Input 65 SG2 Signaling Ground 66 E2 E Lead Output 3, 7 49 SB1 Signaling Battery A-2 E&M Module Connectors VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Installation and Operation Manual Appendix A Pinouts Channel 68-Pin SCSI Designation Function 50 M1 M Lead Input 13 R-IN Voice Input (4-wire) 14 T-IN Voice Input (4-wire) 15 R1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 16 T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 47 SG1 Signaling Ground 48 E1 E Lead Output 45 SB2 Signaling Battery 46 M2 M Lead Input 39 SG2 Signaling Ground 40 E2 E Lead Output 4, 8 55 SB1 Signaling Battery 56 M1 M Lead Input 19 R-IN Voice Input (4-wire) 20 T-IN Voice Input (4-wire) 21 R1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 22 T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 53 SG1 Signaling Ground 54 E1 E Lead Output 57 SB2 Signaling Battery 58 M2 M Lead Input 51 SG2 Signaling Ground 52 E2 E Lead Output Adapter Cables Each group of VC-8/VC-8A/VC-16 eight channels is terminated in a 68-pin female SCSI connector located on the module panel. To connect these modules to user equipment by splitting a single VC-8/E&M or VC-16/E&M 68-pin SCSI connector, RAD offers the following families of splitter cables: VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) E&M Module Connectors A-3

Appendix A Pinouts Installation and Operation Manual CBL-KVF8/E&M family: CBL-KVF8/E&M, CBL-KVF8/E&M/4METER, CBL- KVF8/E&M/10METER, CBL-KVF8/E&M/12METER, CBL-KVF8/E&M/25METER Cables with 8 x RJ-45 connectors, 2m, 4m, 10m, 12m, 25m long respectively CBL-KVF8/E&M/OPEN family: CBL-KVF8/E&M/OPEN, CBL- KVF8/E&M/OPEN/4METER, CBL-KVF8/E&M/OPEN/10METER, CBL- KVF8/E&M/OPEN/12METER, CBL-KVF8/E&M/OPEN/25METER Open-end cables with stranded core, 2m, 4m, 10m, 12m, 25m long respectively CBL-KVF8/E&M/OPEN/SOLID/12METER Open-end cable with solid core, 12m long. CBL-KVF8/E&M Family Cables CBL-KVF8/E&M family are adapter cables terminated in eight RJ-45 male connectors, for direct connection of the individual channels to the user equipment. Figure A-1 shows a general view of the CBL-KVF8/E&M cable, and Table A-3 lists the cable wiring, together with functions of the individual connector pins. Figure A-1. CBL-KVF8/E&M Table A-3. CBL-KVF8/E&M Cable Wiring and Connector Pin Functions Channel 68-Pin SCSI Designation Function RJ-45 Connector 37 SB Signaling Battery 1 38 M M Lead Input 2 1 R-IN Voice Input (4-wire) 4 2 T-IN Voice Input (4-wire) 5 1 3 R1-OUT 4 T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) Voice Output (4-wire) Voice Input/Output (2-wire) 3 6 } Twisted Pair 35 SG Signaling Ground 7 36 E E Lead Output 8 2 43 SB Signaling Battery 1 44 M M Lead Input 2 A-4 E&M Module Connectors VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Installation and Operation Manual Appendix A Pinouts Channel 68-Pin SCSI Designation Function RJ-45 Connector 7 R-IN Voice Input (4-wire) 4 8 T-IN Voice Input (4-wire) 5 9 R1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 3 10 T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 6 41 SG Signaling Ground 7 42 E E Lead Output 8 49 SB Signaling Battery 1 50 M M Lead Input 2 13 R-IN Voice Input (4-wire) 4 14 T-IN Voice Input (4-wire) 5 3 15 R1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 3 16 T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 6 47 SG Signaling Ground 7 48 E E Lead Output 8 55 SB Signaling Battery 1 56 M M Lead Input 2 19 R-IN Voice Input (4-wire) 4 20 T-IN Voice Input (4-wire) 5 4 21 R1-OUT 22 T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) Voice Output (4-wire) Voice Input/Output (2-wire) 3 6 53 SG Signaling Ground 7 54 E E Lead Output 8 61 SB Signaling Battery 1 62 M M Lead Input 2 5 25 R-IN Voice Input (4-wire) 4 26 T-IN Voice Input (4-wire) 5 27 28 R1-OUT T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) Voice Output (4-wire) Voice Input/Output (2-wire) 3 6 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) E&M Module Connectors A-5

Appendix A Pinouts Installation and Operation Manual Channel 68-Pin SCSI Designation Function RJ-45 Connector 59 SG Signaling Ground 7 60 E E Lead Output 8 67 SB Signaling Battery 1 68 M M Lead Input 2 31 R-IN Voice Input (4-wire) 4 32 T-IN Voice Input (4-wire) 5 6 33 R1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 3 34 T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) 6 65 SG Signaling Ground 7 66 E E Lead Output 8 45 SB Signaling Battery 1 46 M M Lead Input 2 5 R-IN Voice Input (4-wire) 4 6 T-IN Voice Input (4-wire) 5 7 11 R1-OUT 12 T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) Voice Output (4-wire) Voice Input/Output (2-wire) 3 6 39 SG Signaling Ground 7 40 E E Lead Output 8 57 SB Signaling Battery 1 58 M M Lead Input 2 17 R-IN Voice Input (4-wire) 4 18 T-IN Voice Input (4-wire) 5 8 23 R1-OUT 24 T1-OUT Voice Output (4-wire) Voice Input/Output (2-wire) Voice Output (4-wire) Voice Input/Output (2-wire) 3 6 51 SG Signaling Ground 7 52 E E Lead Output 8 CBL-KVF8/E&M/OPEN Family Cables CBL-KVF8/E&M/OPEN, CBL-KVF8/E&M/OPEN/4METER, CBL- KVF8/E&M/OPEN/10METER, CBL-KVF8/E&M/OPEN/12METER and CBL- A-6 E&M Module Connectors VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Installation and Operation Manual Appendix A Pinouts KVF8/E&M/OPEN/25METER are open-end splitter cables with stranded core, for connecting the SCSI-68 connector to the E&M user equipment. This cable includes one male SCSI-68 and 8 open-ended connectors. The cables are 2m, 4m, 10m, 12m and 25m long, respectively. See their drawing and pinout in the figure and table below. Figure A-2. CBL-KVF8/E&M/OPEN Cables Table A-4. CBL-KVF8/E&M/OPEN Pinout Open-Ended Connector Pin SCSI-68 Connector Pin Blue Signal Battery 37 White/Blue Signaling E Lead Output 38 Orange Voice Rx Input 1 1 2 White/Orange Voice Rx Input 2 Green Voice Tx Output 3 White/Green Voice Tx Output 4 Brown Signal GND 35 White/Brown Signaling E Lead Output 36 Blue Signal Battery 43 White/Blue Signaling E Lead Output 44 Orange Voice Rx Input 7 White/Orange Voice Rx Input 8 Green Voice Tx Output 9 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) E&M Module Connectors A-7

Appendix A Pinouts Installation and Operation Manual Open-Ended Connector Pin SCSI-68 Connector Pin White/Green Voice Tx Output 10 Brown Signal GND 41 White/Brown Signaling E Lead Output 42 Blue Signal Battery 49 White/Blue Signaling E Lead Output 50 Orange Voice Rx Input 13 3 4 5 6 7 White/Orange Voice Rx Input 14 Green Voice Tx Output 15 White/Green Voice Tx Output 16 Brown Signal GND 47 White/Brown Signaling E Lead Output 48 Blue Signal Battery 55 White/Blue Signaling E Lead Output 56 Orange Voice Rx Input 19 White/Orange Voice Rx Input 20 Green Voice Tx Output 21 White/Green Voice Tx Output 22 Brown Signal GND 53 White/Brown Signaling E Lead Output 54 Blue Signal Battery 61 White/Blue Signaling E Lead Output 62 Orange Voice Rx Input 25 White/Orange Voice Rx Input 26 Green Voice Tx Output 27 White/Green Voice Tx Output 28 Brown Signal GND 59 White/Brown Signaling E Lead Output 60 Blue Signal Battery 67 White/Blue Signaling E Lead Output 68 Orange Voice Rx Input 31 White/Orange Voice Rx Input 32 Green Voice Tx Output 33 White/Green Voice Tx Output 34 Brown Signal GND 65 White/Brown Signaling E Lead Output 66 Blue Signal Battery 45 White/Blue Signaling E Lead Output 46 A-8 E&M Module Connectors VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Installation and Operation Manual Appendix A Pinouts Open-Ended Connector Pin SCSI-68 Connector Pin Orange Voice Rx Input 5 White/Orange Voice Rx Input 6 Green Voice Tx Output 11 White/Green Voice Tx Output 12 Brown Signal GND 39 White/Brown Signaling E Lead Output 40 Blue Signal Battery 57 White/Blue Signaling E Lead Output 58 Orange Voice Rx Input 17 8 White/Orange Voice Rx Input 18 Green Voice Tx Output 23 White/Green Voice Tx Output 24 Brown Signal GND 51 White/Brown Signaling E Lead Output 52 CBL-KVF8/E&M/OPEN/SOLID/12METER Cable CBL-KVF8/E&M/OPEN/SOLID/12METER is an open-end splitter cable with solid core, for connecting the SCSI-68 connector to the E&M user equipment. This cable includes one male SCSI-68 and one open-ended connector. The cable is 12m (39.3 ft) long. See its drawing and pinout in the figure and table below. Figure A-3. CBL-KVF8/E&M/OPEN/12M Cable Table A-5. CBL-KVF8/E&M/OPEN/12M Pinout Open-Ended Connector Pin SCSI-68 Connector Pin Notes Blue Signaling M Lead Input 38 1 2 White Voice Rx Input 1 Orange Voice Rx Input 2 Twisted White Voice Tx Output 3 Green Voice Tx Output 4 Twisted Brown Signaling E Lead Output 36 Gray Signaling M Lead Input 44 White Voice Rx Input 7 Twisted VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) E&M Module Connectors A-9

Appendix A Pinouts Installation and Operation Manual Open-Ended Connector Pin SCSI-68 Connector Pin Notes 3 4 5 6 7 8 White/Blue Voice Rx Input 8 White Voice Tx Output 9 Orange/Blue Voice Tx Output 10 Green/Blue Signaling E Lead Output 42 Brown/Blue Signaling M Lead Input 50 White Voice Rx Input 13 Gray/Blue Voice Rx Input 14 White Voice Tx Output 15 White/Orange Voice Tx Output 16 Orange/Green Signaling E Lead Output 48 Orange/Brown Signaling M Lead Input 56 White Voice Rx Input 19 Gray/ Orange Voice Rx Input 20 White Voice Tx Output 21 White/Green Voice Tx Output 22 Green/Brown Signaling E Lead Output 54 Gray/Green Signaling M Lead Input 62 White Voice Rx Input 25 White/Brown Voice Rx Input 26 White Voice Tx Output 27 Gray/Brown Voice Tx Output 28 White/Gray Signaling E Lead Output 60 Blue Signaling M Lead Input 68 Yellow Voice Rx Input 31 Orange Voice Rx Input 32 Yellow Voice Tx Output 33 Green Voice Tx Output 34 Brown Signaling E Lead Output 66 Gray Signaling M Lead Input 46 Yellow Voice Rx Input 5 White/Blue Voice Rx Input 6 Yellow Voice Tx Output 11 Orange/Blue Voice Tx Output 12 Green/Blue Signaling E Lead Output 40 Brown/Blue Signaling M Lead Input 58 Yellow Voice Rx Input 17 Gray/Blue Voice Rx Input 18 Twisted Twisted Twisted Twisted Twisted Twisted Twisted Twisted Twisted Twisted Twisted Twisted A-10 E&M Module Connectors VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Installation and Operation Manual Appendix A Pinouts Open-Ended Connector Pin SCSI-68 Connector Pin Notes Yellow Voice Tx Output 23 White/Orange Voice Tx Output 24 Orange/Green Signaling E Lead Output 52 Drain Wire Twisted Shell A.2 FXS and FXO Module Connectors The VC-8 FXS and FXO modules have two modifications with different type of connectors: VC-8 and VC-8/RJ. The VC-4, VC-4A, VC-8/RJ and VC-8A module interfaces are terminated in four or eight RJ-12 connectors one per channel. In the VC-16 and VC-8 modules, all the module channels are terminated in a single 50-pin female TELCO connector. RJ-12 Connectors Table A-6 lists the wiring of the RJ-12 connectors used for the FXO and FXS modules. Table A-6. RJ-12 Connector Wiring Pin Function 1, 2 Not connected 3 Ring 4 Tip 5, 6 Not connected Adapter Cables RAD offers two adapter cables terminated in RJ-12 male connectors, for direct connection of the individual channels to the user s equipment: CBL-VC16/FXSO, intended for use with VC-16/FXS and VC-16/FXO modules, which is terminated in 16 RJ-12 male connectors CBL-VC8/FXSO, intended for use with VC-8/FXS and VC-8/FXO modules, which is terminated in 8 RJ-12 male connectors. Figure A-4 shows a general view of CBL-VC16/FXSO. CBL-VC8/FXSO is similar, except that it has only 8 RJ-12 connectors. Table A-7 lists the wiring of the CBL-VC16/FXSO cable, together with the functions of the VC-16 module connector. For VC-8 modules and CBL-VC8/FXSO cables, only the pins assigned to channels 1 to 8 are connected. VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) FXS and FXO Module Connectors A-11

Appendix A Pinouts Installation and Operation Manual Figure A-4. CBL-VC16/FXSO, General View A-12 FXS and FXO Module Connectors VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Installation and Operation Manual Appendix A Pinouts Table A-7. CBL-VC16/FXSO Cable Wiring and Connector Pin Functions Channel 50-Pin TELCO Function RJ-12 Pin 1 2 3 4 5 6 7 8 9 10 11 12 Ring 3 13 Tip 4 9 Ring 3 10 Tip 4 6 Ring 3 7 Tip 4 49 Ring 3 50 Tip 4 46 Ring 3 47 Tip 4 24 Ring 3 25 Tip 4 3 Ring 3 4 Tip 4 26 Ring 3 27 Tip 4 29 Ring 3 30 Tip 4 21 Ring 3 22 Tip 4 18 Ring 3 19 Tip 4 VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x) FXS and FXO Module Connectors A-13

Appendix A Pinouts Installation and Operation Manual Table A-7. CBL-VC16/FXSO Cable Wiring and Connector Pin Functions (Cont.) Channel 50-Pin TELCO Function RJ-12 Pin 12 13 14 15 15 Ring 3 16 Tip 4 43 Ring 3 44 Tip 4 40 Ring 3 41 Tip 4 37 Ring 3 38 Tip 4 16 34 35 Ring Tip 3 4 A-14 FXS and FXO Module Connectors VC-4/4A/8/8A/16 MP-2100/2104/MP-4100 (ver. 2.x)

Publication No. 764-238-08/15 Order this publication by Catalog No. 803281 International Headquarters 24 Raoul Wallenberg Street Tel Aviv 69719, Israel Tel. 972-3-6458181 Fax 972-3-6498250, 6474436 E-mail market@rad.com North America Headquarters 900 Corporate Drive Mahwah, NJ 07430, USA Tel. 201-5291100 Toll free 1-800-4447234 Fax 201-5295777 E-mail market@radusa.com www.rad.com