OPERATION MANUAL INSTALLATION AND VC-4/OMNI. Omnibus PCM Voice Module. Megaplex-2100/2104 Version 12, Megaplex-4100 Version 1.6. The Access Company

Transcription

1 INSTALLATION AND OPERATION MANUAL VC-4/OMNI Omnibus PCM Voice Module Megaplex-2100/2104 Version 12, Megaplex-4100 Version 1.6 The Access Company

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3 VC-4/OMNI Omnibus PCM Voice Module Megaplex-2100/2104 Version 12, Megaplex-4100 Version 1.6 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/OMNI and any software components contained therein are proprietary products of RAD protected under international copyright law and shall be and remain solely with RAD. VC-4/OMNI is a registered trademark of 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. You shall not copy, reverse compile or reverse assemble all or any portion of the Manual or the VC-4/OMNI. 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/OMNI, based on or derived in any way from the VC-4/OMNI. Your undertaking in this paragraph shall survive the termination of this Agreement. This Agreement is effective upon your opening of the VC-4/OMNI 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/OMNI 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: Fax: , market@rad.com North America Headquarters RAD Data Communications Inc. 900 Corporate Drive Mahwah, NJ 07430, USA Tel: (201) , Toll free: Fax: (201) market@radusa.com RAD Data Communications Ltd. Publication No /08

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5 Quick Start Guide If you are familiar with the VC-4/OMNI module, use this guide to prepare a module for operation. 1. Preliminary Preparations 1. Insert the module in the assigned I/O slot. 2. Refer to the site installation plan, identify the cable intended for connection to the VC-4/OMNI connector, and connect the cable as explained below. 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 desired VC-4/OMNI port in the MP-2100/2104 chassis: Use the command: DEF CH SS * where SS is the slot number. To configure the desired VC-4/OMNI port in the MP-4100 chassis: Use the Configuration>Physical Ports>I/O screen. The configuration parameters and the allowed range of values are listed below. General Parameters Parameter Coding Range of Values a LAW u LAW External Port Parameters Parameter Connect Range of Values YES NO VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver

6 Quick Start Guide Installation and Operation Manual Parameter Admin Status (MP-4100 only) Tx Gain Rx Gain Operation Mode Wires Num Range of Values UP DOWN According to the table below According to the table below OMNI BUS POINT TO POINT POINT2MP DST POINT2MP SRC 4 WIRES 2 WIRES Transmit and Receive Levels for 2-Wire and 4-Wire Interfaces Module Transmit [dbm] Receive [dbm] min max min max 2W W Internal Port Parameters Parameter Connect (MP-2100/2104 only) Admin Status (MP-4100 only) ML Slot (MP-2100/2104 only) Destination Slot (MP-4100 only) ML Port (MP-2100/2104 only) Destination Port (MP-4100 only) Signaling Values YES NO UP DOWN IO-1 up to the maximum supported by chassis CL, IO-1 to IO-10 EX1 up to the maximum supported by the selected main link module 1 to 8 for external ports 1 to 63 (1 to 84) for internal (virtual) PDH ports NONE Legacy ABCD No 2 VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

7 Installation and Operation Manual Quick Start Guide 3. Assigning Timeslots After performing the configuration of the individual module channels, assign an uplink bandwidth to each connected internal channel. For the module installed in the MP-2100/2104 chassis, use the DEF TS command For the module installed in the MP-4100 chassis, use the Configuration>System>TS Assignment screen. All internal port timeslots must be defined as VOICE. VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver

8 Quick Start Guide Installation and Operation Manual 4 VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

9 Contents Chapter 1. Introduction 1.1 Overview Applications Physical Description VC-4/OMNI Front Panel Functional Description Interface Characteristics Audio Channel Characteristics Timeslot Assignment Handling of Signaling Information Transfer of Signaling Information Signaling Profile OOS Signaling Test and Diagnostic Capabilities Technical Specifications Chapter 2. Installation and Operation 2.1 Introduction Setting Internal Switches Installing the Module in the Chassis Connecting the Cables Connector Data Connecting the Signaling and Feed Voltage Source Chapter 3. Configuration 3.1 Introduction Configuration Sequence for the MP-2100/2104 Chassis Configuration Sequence for the MP-4100 Chassis Configuration Parameters General Module Parameters External Port Parameters Internal Port Parameters Assigning Timeslots Displaying VC-4/OMNI Information Displaying Status and Configuration Information Displaying Signaling Information Chapter 4. Troubleshooting and Diagnostics 4.1 Introduction Test and Diagnostic Functions Local Digital Loopback (Local Loop) Remote Digital Loopback (Remote Loop) Forward Tone Injection Backward Tone Injection Troubleshooting Frequently Asked Questions Technical Support VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6 i

10 Table of Contents Installation and Operation Manual ii VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

11 Chapter 1 Introduction 1.1 Overview This manual describes the technical characteristics, applications, installation and operation of the VC-4/OMNI voice interface modules for the Megaplex-2100, Megaplex-2104, and Megaplex-4100 integrated access multiplexers. The VC-4/OMNI module provides four toll-quality voice channels to support omnibus applications where each site communicates with multiple remote stations simultaneously (such as to broadcast an important message). Voice signals are digitized using PCM, in compliance with ITU-T G.711 standards, enabling up to 30 voice channels to be transmitted over an E1 link, or 24 voice channels over a T1 link. Encoding and decoding are in full compliance with ITU-T requirements G.712, G.713 and G.714. Voice channel companding is selectable for A-law or μ-law. Note The module offers flexible configuration of all their operational parameters, including automatic selection of the signaling information format in accordance with the operation mode. In this manual, 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. 1.2 Applications The VC-4/OMNI module provides four toll-quality voice channels to support omnibus applications where a master site needs to communicate with multiple remote stations simultaneously (such as to broadcast an important message). Voice signals are digitized using PCM, in compliance with ITU-T G.711 standards. Encoding and decoding are in full compliance with ITU-T requirements G.712, G.713 and G.714. Voice channel companding is selectable for A-law or μ-law. VC-4/OMNI accesses any Megaplex internal TDM bus so that a channel may be transmitted simultaneously to up to four different main links (trunks). This enables establishing up to 5-way conference call per channel. VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver BApplications 1-1

12 Chapter 1 Introduction Installation and Operation Manual A conference call is established between the local party connected to the VC-4/OMNI channel (external port) and the remote parties, which are connected to up to four timeslots (internal ports) assigned to this external port (see Figure 1-1). All conferencing parties can speak to and hear each other. A single VC-4/OMNI module can support up to four independent conference calls simultaneously. Figure 1-1. Omnibus Connection VC-4/OMNI modules, together with the ML-2E1/T1 main link, make possible a fully functional omnibus application. When using a single 2U-high compact Megaplex-2104 chassis, up to 16 omnibus voice channels can be supported. Point-to-multipoint applications for voice or voice-band modems are supported as well (see Figure 1-2). In this configuration, the PCM is broadcasted from the master side (source) towards the stations (destinations). The stations can speak to and hear only the master but not the other stations. When a module is initially configured, it should be defined which link is associated with a Master side and which associated with a remote Station side. Figure 1-2. Typical Point-to-Multipoint (Modem) Connection Another mode supported is point-to-point. In this mode the channel is operated as a regular E&M voice channel. Figure 1-3 illustrates this mode on the example of one central and three remote stations BApplications VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

13 Installation and Operation Manual Chapter 1 Introduction Figure 1-3. Typical Point-to-Point Connection 1.3 Physical Description The VC-4/OMNI module occupies one module slot in the Megaplex chassis. All their characteristics are controlled by software. The module panel is described below. VC-4/OMNI Front Panel Figure 1-4 shows a panel of the VC-4/OMNI module. The module interface is terminated in four RJ-45 connectors one per channel. VC-4/Omni E&M E CH-1 M E CH-2 M E CH-3 M E CH-4 M VC-4/OMNI/E&M Figure 1-4. VC-4/OMNI Module Panel VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver BPhysical Description 1-3

14 Chapter 1 Introduction Installation and Operation Manual Interface Characteristics 1.4 Functional Description The VC-4/OMNI module has soft-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 channel. The module supports four types of E&M signaling: EIA RS-464 types I, II, III and V (similar to British Telecom SSDC5): 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. 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). Note See Connecting the Signaling and Feed Voltage Source in Chapter 2 for details on DC power sources and connection methods. The signaling type is jumper-selectable (see Chapter 2 for details). Figure 1-5 shows the equivalent signaling circuits for the different signaling modes. Gain control is soft-selectable for both the receive and transmit directions, enabling easy installation in all environments. All operating parameters are configurable via the management system for both the local and remote modules BFunctional Description VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

15 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 M Lead SB Lead - 48VDC Condition On-Hook Off-Hook M/SB Open - 48VDC E/SG Open GND - 48VDC E Lead SG Lead B. RS-464 Type II PBX M Lead SB Lead E&M Interface - 48VDC Condition M/SB E/SG On-Hook Off-Hook Open - 48VDC Open GND - 48VDC E Lead SG Lead C. RS-464 Type III PBX 1.2 kω M Lead E& M Interface - 48VDC Condition On-Hook Off-Hook M/SB Open -48VDC E Open GND - 48VDC E Lead 1.2 kω D. RS-464 Type V, SSDC5 PBX M Lead E& M Interface Condition M SG +5 VDC +12 VDC SB Lead SG Lead - 48VDC On-Hook Off-Hook Open GND Open GND E. E&M/POS Version (Type II only) LEGEND = Signaling Detector Circuit Figure 1-5. E&M Equivalent Signaling Circuits VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver BFunctional Description 1-5

16 Chapter 1 Introduction Installation and Operation Manual Audio Channel Characteristics All the VC modules provide high-quality voice channels using toll-quality 64 kbps PCM encoding complying with ITU-T Rec. G.711 and AT&T Pub Two companding laws are supported, μ-law and A-law. 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. 2-wire and 4-wire interfaces are soft-selectable independently for each channel. To increase application flexibility, the nominal audio transmit and receive levels of all the module versions can be adjusted over a wide range in 0.5 dbm steps. Due to the high-quality audio reproduction, DTMF signaling is transparently transferred through the voice channel. 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. Timeslot Assignment The VC-4/OMNI module uses 64 kbps PCM encoding, and therefore requires one main link timeslot per voice channel. The user can freely route each voice channel to any main link port. The voice channel data is provided in DS-0 (8 bits) compatible format, permitting voice channel routing by DACS cross-connect systems. Handling of Signaling Information The VC-4/OMNI module also permits 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 on the main link port serving the module. The following sections describe the handling of the signaling information when using the legacy main link service mode. Transfer of Signaling Information 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) and the framing mode 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 accordance with ITU-T Rec. G.704, the CAS information is transmitted in timeslot 16. This timeslot carries four signaling bits for each payload timeslot. For T1 trunks with ESF framing, which use a 24-frame multiframe structure, the standard signaling method is inband Robbed Bit Multiframe (RBMF) signaling. The ESF multiframe structure includes four signaling bits for each 1-6 4BFunctional Description VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

17 Installation and Operation Manual Chapter 1 Introduction payload timeslot. This method is compatible with ITU-T Rec. G.704 and AT&T Pub When this method is used, the least significant bit of each channel is periodically overwritten with signaling information. 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. For applications which do not require end-to-end signaling, or can use only inband signaling, e.g., DTMF, you can disable the transfer of signaling information. For your convenience, Table 1-1 lists the supported signaling methods and the number of signaling bits for E1 and T1 links. Refer to the corresponding Megaplex Installation and Operation Manual for additional information. Table 1-1. Signaling Methods and Number of Signaling Bits Signaling Method E1 Main Link T1 Main Link G.732S G.732N ESF SF (D4) No signaling 0 bits 0 bits 0 bits 0 bits Legacy 4 bits Not supported 4 bits 2 bits ABCD (RAD proprietary for VC-4/OMNI modules) 4 bits Not supported 4 bits 2 bits Signaling Profile The signaling information exchanged by the channels of VC-4/OMNI module is used to determine the state of the E and M leads. Note In most applications, the user need not be concerned with the issue of signaling information. The additional flexibility needed for special applications is provided by signaling profiles, which control the processing of signaling information received and transmitted by each main link: 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. See the corresponding Megaplex Installation and Operation Manual for details. The format of the signaling information generated by a VC-4/OMNI module is provided in Table 1-2. X in this table indicates that the corresponding bit is not relevant. VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver BFunctional Description 1-7

18 Chapter 1 Introduction Installation and Operation Manual Some applications, for example, certain T1 PSTN applications, may require different signaling bit states. In this case, use the DEF PROFILE command (Megaplex-2100/2104) or Configuration>System>Signaling Profile screen (Megaplex-4100) to define a profile that performs the desired conversions, and then assign that profile to the main link port carrying the VC-4/OMNI traffic. Table 1-2. Default Signaling Bit States for VC-4/OMNI Module Direction Analog Interface State Signaling Bits A B C D Tx (M) Rx (E) Idle Active Idle 0 X X X Active 1 X X X OOS Signaling In case the communication between modules located in different Megaplex units fails, e.g., because loss of synchronization, etc., it is necessary to control the state of the signaling information at the two ends of the link. This 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). 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). 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). 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 analog 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 BFunctional Description VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

19 Installation and Operation Manual Chapter 1 Introduction 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, the signaling information of any module channel (the state of the received and transmitted signaling bits) can be displayed by means of: dedicated command, DSP SIG TS in Megaplex-2100/2104 Configuration>System>Signaling Profile screen in Megaplex Technical Specifications Number of 4 Channels Voice Encoding Method PCM per ITU-T Rec. G.711, AT&T Pub Companding μ-law or A-law (user-selectable) Main Link Bandwidth Requirements 64 kbps per enabled channel (one main link timeslot) Signaling CAS over Timeslot 16 DTMF transparently transferred Analog Interface Interface Type 4-wire or 2-wire (soft-selectable) Applicable Standards 2-wire: ITU-T Rec. G wire: ITU-T Rec. G.712, G.714 Nominal Level Nominal Impedance Return Loss (ERL) in the Range of 300 to 3400 Hz Frequency Response (Ref: 1020 Hz) 0 dbm 600 Ω Better than 20 db 0 db ±0.5 db, at 300 to 3000 Hz 0 db ±1.1 db, at 250 to 3400 Hz VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver BTechnical Specifications 1-9

20 Chapter 1 Introduction Installation and Operation Manual Level Adjustment (soft-selectable) TX: +5 dbm to -10 dbm RX: +2 dbm to -10 dbm Steps: 0.5dB (±0.1 db), nominal Signal to Total Distortion -30 to 0 dbm0: better than 33 db Using ITU-T Rec. G.712, -45 to +3 dbm0: better than 22 db G.713, Method 2 (8-bit PCM encoding) Idle Channel Noise Transformer Isolation E&M Interface Signaling Method (User-Selectable) Better than -70 dbm0 (+20 dbrnc) 1500 VRMS 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, a -48 VDC supply is required. See Chapter 2 for details. Signaling Distortion ±2 msec max End-to-End T1 Main Links User-selectable sampling rate: Signaling 667 samples per second with SF (D4) framing 333 samples per second with ESF framing E1 Main Links User-selectable as per ITU-T Rec. G.704, para Diagnostics Connectors Local digital loopback for any channel towards the local user equipment Remote analog 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 RJ-45 connector for each channel Power Consumption 5.6W Indicators Per channel E green M - green Configuration Programmable via Megaplex system management BTechnical Specifications VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

21 Chapter 2 Installation and Operation 2.1 Introduction This Chapter provides installation and operation instructions for the VC-4/OMNI module. 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 Setting Internal Switches The VC-4/OMNI module has several internal switches, which are used to select the signaling mode. The signaling mode is simultaneously selected for all the channels. Figure 2-1 shows the switch locations, and Table 2-1 lists the required switch settings. VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6 Setting Internal Switches 2-1

22 Chapter 2 Installation and Operation Installation and Operation Manual OFF OFF SW2 SW3 ON ON OFF SW4 ON Figure 2-1. VC-4/OMNI Internal Switches Table 2-1. Selection of E&M Signaling Mode Signaling Mode Switch SW2 Switch SW3 Switch SW4 RS-464 Type I ON ON ON RS-464 Type II ON OFF ON RS-464 Type III ON ON ON RS-464 Type V (BT SSDC5) OFF OFF OFF The E&M module signaling mode is factory-set for RS-464 Type V / BT SSDC5. To configure the VC-4/OMNI module: Select the signaling mode as required according to Table Installing the Module in the Chassis 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. 2-2 Installing the Module in the Chassis VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

23 Installation and Operation Manual Chapter 2 Installation and Operation 2.4 Connecting the Cables Connector Data The VC-4/OMNI module interface has four RJ-45 connectors. Table 2-2 lists their wiring. Table 2-2. 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 Connecting the Signaling and Feed Voltage Source Note Review Section 1.1 for a description of subscriber feed considerations. The -48 VDC signaling battery voltage used by modules for full compliance with the EIA RS-464 Type II, III and V (BT SSDC5) signaling standards is supplied to the VC-4/OMNI 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 and MP-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-4/OMNI 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. VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6 Connecting the Cables 2-3

24 Chapter 2 Installation and Operation Installation and Operation Manual 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 ringer. 2-4 Connecting the Cables VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

25 Chapter 3 Configuration 3.1 Introduction This chapter provides configuration information for VC-4/OMNI 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 an VC-4/OMNI module and put it into service: 1. Add a VC-4/OMNI 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-4/OMNI parameters: To define the general module parameters on the supervision terminal, type the command: DEF CH SS where SS is the slot number. For the parameter description, see Table 3-1. To define the parameters of an external port, type the command: DEF CH SS CC where SS is the slot number, and CC is the channel number (1 to 4). For the parameter description, see Table 3-2. VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver

26 Chapter 3 Configuration Installation and Operation Manual To define the parameters of an internal port, type the command: DEF CH SS INX where SS is the slot number, and X is the internal channel number (1 to 16). For the parameter description, see Table 3-3. To define the general module parameters and parameters of all the ports (internal and external) on the supervision terminal, type the command: DEF CH SS * where SS is the slot number. Note 3. Assign timeslots 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-4/OMNI module and put it into service: 1. Add a VC-4/OMNI 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/M8SL module port parameters (depending on the VC-4/OMNI module application). For the configuration procedure, refer to the appropriate Installation and Operation Manual. 3. Configure the VC-4/OMNI parameters. Use the Configuration>Physical Ports>I/O screen for external port parameters, and Configuration>Virtual Ports>I/O screen for internal port parameters. 4. 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/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

27 Installation and Operation Manual Chapter 3 Configuration 3.4 Configuration Parameters Each VC-4/OMNI port can be independently configured in accordance with the system requirements. In addition, there are configurable parameters that pertain to the entire VC-4/OMNI module. General Module Parameters Table 3-1 explains the only available general programmable module parameter, and its range of values. Table 3-1. General Module Parameters Parameter Coding Description Specifies the companding law to be used by the voice channels: a LAW A-law coding, intended for use on E1 links u LAW μ-law coding, intended for use on T1 links Default: a LAW External Port Parameters Table 3-2 explains the programmable external port parameters, and their range of values. Each external port can be configured independently. Table 3-2. External Port Parameters Parameter Connect (MP-2100/2104 only) Admin Status (MP-4100 only) Tx Gain Description Determines whether the channel is connected to the main link: NO Channel is disconnected. You can still program the desired parameters, so the channel will be ready for operation when needed. YES Channel is connected. 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 of +5 dbm to -10 dbm. 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 VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6 Configuration Parameters 3-3

28 Chapter 3 Configuration Installation and Operation Manual Parameter Description Default: 0 dbm VC-4/OMNI Channel Transmit TLP: -8dB T R Transmit Input Circuit Nominal Level =0dBm 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 Rx Gain Operation Mode Wires Num Selects the nominal input level of the transmit path. The input level can be set in 0.5 db steps in the range of +2 dbm to -10 dbm. Select the receive level to match the TLP-receive of the equipment connected to the channel (see Figure 3-1). Defines the operating mode of the channel: OMNI BUS The channel is operated in an omnibus (conference call) application. POINT TO POINT The channel is operated as a regular E&M voice channel. POINT2MP DST The channel is operated as a destination (remote station) in a point-to-multipoint application POINT2MP SRC The channel is operated as a source (master) in a point-to-multipoint application Default: OMNI BUS Specifies the interface to be used by the voice channels: 4 WIRES 4-wire interface. Can be independently selected for each pair of channels (1, 2; 3, 4). 2 WIRES 2-wire interface. Default: 2 WIRES Internal Port Parameters The VC-4/OMNI module has 16 internal ports, identified as IN1 to IN16. Each four consecutive internal ports are assigned to a definite external port, enabling four conference calls simultaneously: Conference call #1 is formed by any of internal ports IN1, IN2, IN3, IN4 and external port EX1. Conference call #2 is formed by any of internal ports IN5, IN6, IN7, IN8 and external port EX VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

29 Installation and Operation Manual Chapter 3 Configuration Conference call #3 is formed by any of internal ports IN9, IN10, IN11, IN12 and external port EX3. Conference call #4 is formed by any of internal ports IN13, IN14, IN15, IN16 and external port EX4. Each internal TDM port can be independently configured in accordance with the system requirements. To define the parameters of the desired internal port, type: DEF CH SS CC where SS is the VC-4/OMNI slot number, and CC is the desired internal port number (IN1 to IN16). Table 3-3 lists the internal port parameters. Table 3-3. Internal Port Parameters Parameter Function Values Connect (MP-2100/2104 only) Admin Status (MP-4100 only) ML Slot (MP-2100/2104 only) Determines whether this port is connected to the internal TDM buses of the Megaplex chassis Used to enable/disable the flow of traffic through the selected port Specifies the main link module to which this internal port is connected YES NO Default: NO The internal TDM port is connected. The internal TDM port is disconnected. You can still program the desired parameters, so the port will be ready to operate when needed. 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 The allowed range is 1 to 12 for Megaplex-2100, and 1 to 5 for Megaplex Default: IO-1 Destination Slot (MP-4100 only) Specifies the module (I/O slot) to which the data stream handled by the port is routed. The available selections are the CL module installed in the chassis, and I/O modules IO-1 to IO-10. ML Port (MP-2100/2104 only) Specifies the port (external or internal) of the main link module to which this internal port is connected For the allowed values, refer to the Installation and Operation Manual of the corresponding main link. Default: EX1 Destination Port (MP-4100 only) 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) PDH ports (actual range depends on the destination module). VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6 Configuration Parameters 3-5

30 Chapter 3 Configuration Installation and Operation Manual Parameter Function Values Signaling Specifies the end-to-end signaling transfer method Legacy The channel uses legacy signaling (used by the main link channel connected to this channel) The channel uses RAD proprietary signaling for VC-4/OMNI modules Channel signaling is not transferred ABCD NO 3.5 Assigning Timeslots After performing the configuration of the individual module channels, assign an uplink bandwidth to each connected internal channel. For the module installed in the MP-2100/2104 chassis, use the DEF TS command 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, as explained in the Megaplex-4100 Installation and Operation Manual All internal port timeslots must be defined as VOICE. 3.6 Displaying VC-4/OMNI Information In addition to the configuration functions listed above, you can display status information and performance statistics on the module external and internal ports defined on the VC-4/OMNI module, as well as information on the signaling transmitted and received by a specific voice channel carried by one of the module links. Displaying Status and Configuration Information The Megaplex-2100/2104 user can read the VC-4/OMNI status and configuration information using the DSP ST CH command. For a general description of this command, refer to Appendix F of the Megaplex-2100/2104 Installation and Operation Manual. After entering the DSP ST CH SS command, you will see a data form similar to that displayed by the DEF ST CH SS command that displays the current module configuration and status data. The Megaplex-4100 user can read the configuration on every port of the I/O modules using the Configuration>Physical Ports>I/O menu. For a general description of these menus, refer to Chapter 4 of the Megaplex-4100 Installation and Operation Manual. For a description of the displayed parameters, refer to Table 3-1 and Table VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

31 Installation and Operation Manual Chapter 3 Configuration Displaying Signaling Information You can display the signaling information associated with a selected external port timeslot of the main link module: For Megaplex-2100/2104, use the DSP SIG TS SS:CC:TT command (see general description in Appendix F of the Megaplex-2100/2104 Installation and Operation Manual). For Megaplex-4100, use the Configuration>System>Signaling Profile screen (see general description in Chapter 4 of the Megaplex-4100 Installation and Operation Manual). VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6 Displaying VC-4/OMNI Information 3-7

32 Chapter 3 Configuration Installation and Operation Manual 3-8 VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

33 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-4/OMNI modules, refer to Appendix B 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. VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6 Test and Diagnostic Functions 4-1

34 Chapter 4 Troubleshooting and Diagnostics Installation and Operation Manual 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 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 loopback signal path is shown in Figure 4-1. User or Test Equipment Channel VC-4/OMNI - I/O Modules Local Unit Remote Unit VC-4/OMNI I/O Modules User or Test Equipment System Management Figure 4-1. Local Loopback, Signal Path Remote Digital Loopback (Remote Loop) 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. Note The remote loopback is supported only for Point2P or Point2MP SRC operation modes. The loopback signal path is shown in Figure Test and Diagnostic Functions VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

35 Installation and Operation Manual Chapter 4 Troubleshooting and Diagnostics User or Test Equipment Channel VC-4/OMNI I/O Modules Local Unit Remote Unit VC-4/OMNI C 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/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6 Test and Diagnostic Functions 4-3

36 Chapter 4 Troubleshooting and Diagnostics Installation and Operation Manual User or Test Equipment Channel ~ Test Tone VC-4/OMNI I/O Modules Local Unit Remote Unit VC-4/OMNI 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 Test and Diagnostic Functions VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

37 Installation and Operation Manual Chapter 4 Troubleshooting and Diagnostics User or Test Equipment Channel Test Tone VC-4/OMNI I/O Modules Local Unit Remote Unit VC-4/OMNI 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-4/OMNI 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/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6 Troubleshooting 4-5

38 Chapter 4 Troubleshooting and Diagnostics Installation and Operation Manual 4.4 Frequently Asked Questions Q Which Ringer is recommended if the application requires operation on 48 VDC? A The required -48 VDC voltage is always available when the Megaplex chassis is powered from a -48 VDC source. An AC-powered Megaplex-2100 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. In addition, the AC-powered Megaplex-2104 chassis can be ordered with an internal ringer (/RI option). Q When installed in the MP-4100 chassis, do the VC-4/OMNI 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). 4.5 Technical Support Technical support for this product can be obtained from the local distributor from whom it was purchased. For further information, please contact the RAD distributor nearest you or one of RAD's offices worldwide. This information can be found at (offices About RAD > Worldwide Offices; distributors Where to Buy > End Users). 4-6 Technical Support VC-4/OMNI MP-2100/2104 Ver. 12, MP-4100 Ver. 1.6

39 24 Raoul Wallenberg Street, Tel Aviv 69719, Israel Tel: , Fax , Web site: Customer Response Form RAD Data Communications would like your help in improving its product documentation. Please complete and return this form by mail or by fax or send us an with your comments. Thank you for your assistance! Manual Name: VC-4/OMNI Publication Number: /08 Please grade the manual according to the following factors: Excellent Good Fair Poor Very Poor Installation instructions Operating instructions Manual organization Illustrations The manual as a whole What did you like about the manual?