CTC Union Technologies Co., Ltd. Table of contents

Transcription

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2 Table of contents Chapter 1. Description of system 1.1 Introduction Functions of E1 HDSL W/DTE I/F Technical specification of E1 HDSL W/DTE I/F System components 1-6 Chapter 2. Description of E1 HDSL W/DTE I/F system s functions 2.1 System structure Shelf Backboard E1 HDSL W/DTE I/F COT line card and RT line card Stand Alone In-band code loopback test Design of functions for E1 HDSL W/DTE I/F loopback testing Execute loop back test via front-panel push-switch Use CID or LCD command to execute loopback test FE1 Framer and Time slot settings 2-18 Chapter 3. LCD Front Panel Control Function 3.1 Functional Description of Front Panel Control Push Button LCD Control Command Configuration CH-Asgn (Channel Assign) Command CLOCK Command D&I Command DTE Command Network Command Loopbak (Loop Back) command QRSSTsT (QRSS Test) Command System Command ALARM Command PERFRM (Performance) Command 3-12 HDTU02/HRM02 i

3 Chapter 4. Use CID Program to Set up System Configuration 4.1 Preparation of User Environment E1 HDSL W/DTE I/F Preparation Work Before Connection CID Command Configuration CID Program Login Screen Main Screen and Display Function Description Enter Configuration Screen Load Factory Configuration Load User Configuration Edit/Display Configuration Set up the System Parameters Set up Time Slot use Channel Assign Set up D&I E1 interface Configuration and Management Parameters Set up all HDSL LOOP Communication Management Parameters Set up all DTE Interface Parameters and Communication Configuration 4-16 Chapter 5. System administration (Management) 5.1 Screen of system administration Change system s identification data Modify system user s account 5-3 Chapter 6. System alarm and performance statistics (Status) 6.1 Alarm warning message Performance statistics Statistics of bits error for HDSL LOOP Performance statistics for HDSL LOOP E1 Error Statistics Display status of front panel LED (Display LED) Display the identity of system (Display Identity) 6-9 HDTU02/HRM02 ii

4 Chapter 7. System testing 7.1 Loopback tests Devise tests Terminate all tests 7-4 HDTU02/HRM02 iii

5 Chapter 1. Description of system 1.1 Introduction Thank you very much for using E1 HDSL W/DTE I/F system. When you open the package, install the device, and start using this product and find that any accessory is missing, or the product is damaged severely in the process of shipment; thus the system cannot function normally, please dial the service hot-line number listed on warranty card for assistance. E1 HDSL W/DTE I/F is a set of integrated CSU/DSU equipment. It utilizes high-speed digital loop (HDSL LOOP) to provide user data transmission use. E1 HDSL W/DTE INTERFACE provides four types of DTE interfaces. They are V.35, RS- 449/530, X.21 and Ethernet. Only one interface can be used at a time. Another optional interface is G.703 FE1, may be used to connect to company s internal small exchanger. These interfaces can be ordered and shipped as a complete combination. For detailed configuration and order table, please refer to the following table. For converting RS-630 interface to RS449 interface or converting EIA 530 to V.35 interface, our company provides cables meet the specifications, please specify at the time of order. E1 HDSL W/DTE I/F utilizes CAP HDSL (High-bit-rate Digital Subscriber Line) technology. The signal transmission distance is different, based on the differences in data bandwidth. At the application condition of full load bandwidth and using two pairs of 24 AWG (0.5 mm) copper wires, it may be able to transmit 3.0 kilo meter. This technology may effectively provide the solution for LAN to WAN copper wire installation problem. For general business application to install network between two buildings, they may select E1 HDSL W/DTE I/F with Ethernet interface and use as bridging device for both parties to share network resources. E1 HDSL W/DTE I/F comes in two different models: the Line Card type to be installed on the shelf and 9.5 Stand Alone type. The Line Card has to be installed on the shelf designed by this company. A 19 shelf accommodates up to 16 Line Cards. Each Line card operates independently. The Stand Alone type is a complete functional system. You can choose AC, DC or remote power supply model, as shown in diagram below. You can install the device in the standard 19 industrial machine cabinet or place it on the desk. When you purchase this company s products, please HDTU02/HRM02 1-1

6 read the enclosed materials carefully and check all accessories. Appearance of 9.5 Stand Alone Appearance of 19 shelf and Line Card The E1 HDSL W/DTE I/F has different interface combinations, refer to the table below when ordering: Interface combinations 1 Interface combinations 2 Interface combinations 3 Interface combinations 4 Interface combinations 5 Interface combinations 6 E1 HDSL/DSU Nx64K with V.35 DTE Port E1 HDSL/DSU Nx64K with V.35 & FE1 Port E1 HDSL/DSU Nx64K with Ethernet Port E1 HDSL/DSU Nx64K with Ethernet & FE1 Port E1 HDSL/DSU Nx64K with Ethernet & V.35 Port E1 HDSL/DSU Nx64K with Ethernet & V.35 Port & FE1 Port If the customer selected the line card, it must use this company s shelf to work properly. In this case, the interface selections have only two types, RS-530 and FE1 interfaces. Among them, the larger backboard RS- 530 interface can make use of the converting line cable to convert to V.35 interface. If the customer selected the stand alone model, then there are three interfaces provided for selection and configuration, the detailed combinations are shown above. 1.2 Functions of E1 HDSL W/DTE I/F The major utility of E1 HDSL W/DTE I/F is the E1 data network. It can, at the user side, convert signal to FE1, V.35 or Ethernet signals. The E1 HDSL W/DTE I/F uses the digital loop technique of HDSL. This technique uses, primarily, a pair of traditional telephone circuit to communicate data information. If using 24 AWG telephone line, the transmission distance may reach 3.6 kilo meter. The HDSL loop speed is fixed. Comparing to traditional HDSL products, this system s feature is that it may be used to provide signal conversion among DTE (Data Terminal Equipment) HDTU02/HRM02 1-2

7 equipment. While the signal, through HDSL loop, transmits to user side, this system provides four DTE interfaces. They are V.35, RS-449/530, X.21 and 10-BaseT Ethernet as well as an optional Drop/Insert G.703 E1 interface. They are used, respectively, to link the terminal device, Ethernet LAN HUB or PBX. Whereas the signals from these DTE equipment or FE1, after conversion to the HDSL signal format, carry through loop to the telecommunication bureau terminal. They then convert to standard E1 G.703 signal format and link to the E1 network of the telecommunication, or connect to the terminal device of the ISP, link to Internet. Therefore, E1 HDSL W/DTE I/F has the capability of long distance signal transmission. At the same time, it can provide data interface to let user utilize LAN or voice communication equipment. E1 HDSL W/DTE I/F possesses the following functions: When coming out of the factory, the standard user interface of the stand alone has four types of DTE interface, V.35, RS- 449/530, X.21 or Ethernet interface. Only one type of DTE interface can be used at a time. And a G.703 FE1 interface. These interface speeds can be set and selected through program. Shelf type is equipped with the EIA RS- 530 interface. It may use CID program in conjunction with the use of conversion connector to set up as RS- 449 or V.35. HDSL loop uses CAP coding format, uses two pairs of traditional telephone copper wire for transmission, the distance can reach 3.6 kilo-meter. Providing RJ-45 CID interfaces (RS- 232) to make use of the VT-100 terminal simulation program to carry out the OAM& P function. Time Slots Assignment, based on user requirement to set the time slot number. Provide one FE1 G.703 interface, specifications comply with the ITU-T G.703, G.704 standard. Provide one 10-BaseT Ethernet interface The line code of the E1& FE1 signals may select either the AMI or HDB3 format. Build in generating unit and reception unit of QRSS and PRBS test pattern, allow the system conduct self diagnosis Build in 16 bytes programmable code of loop back tests; can execute In-band loop-back test. In application, each 19" Shelf can accommodates up to 16 pieces of line cards, including one management control line unit (MCU) card and 15 pieces of E1 HDSL W/DTE I/F line cards. The customer can also purchase network management system to carry out network management function. The synchronous methods of the system include reference to E1 input signal, HDTU02/HRM02 1-3

8 DTE external oscillator, internal Oscillator etc. 1.3 Technical specification of E1 HDSL W/DTE I/F E1 HDSL Loop Interface Line Rate Line Code Mb/s ± 32ppm 64-CAP 128-CAP Line Impedance 135ohms Average Transmit Power 13.5 dbm nominal Test Loops G test loops # 1 ~ 8 Range(BER< fl^7) 4.0/2.5KM (24/26 AWG) FE1 Interface Sealing Current Line Interface > 15 ma <20Ma E1-G.703 Line Rate 2.048Mbps +/- 50ppm Line Code HDB3, AMI Frame format FAS, FAS_CAS, FAS_MFAS, FAS_MFAS_CAS, Unframed Line Impedance 75 ohm, unbalanced 120 ohm, balanced Pulse shape G.703 Receive Line equalizer Adaptive equalizer (0 to 6 db) Jitter tolerance and Wander G.823 Max. output Jitter HTU-C: <0.3 UI p-p for 20Hz 100KHz <0.15 UI p-p for 700Hz -100KHz HTU-R: HDTU02/HRM02 1-4

9 DTE interface Data Rate <1.5 UI p-p for 20Hz 100KHz <0.2 UI p-p for 700Hz -100KHz N*64[56]Kb/s, 1 N 32 Interface EIA RS-530, RS-449 or V.35 or Ethernet Timing Source at COT Receive clock Transmit Clock Data Interface Control Signal Transmit clock Normal/Inverted Normal/Inverted ST or TT Normal/Inverted Always on, off or reflect operation Input E1 Loop timing DTE timing Free running clock Internal Oscillator External Clock Bipolar 64/8K CC, all one G.703 E1 Impedance:120ohm balanced Timing Source at RT Transmit clock Loop timing Input DS1 DTE timing Power Requirements Free running clock Input Voltage (Shelf type) Internal Oscillator -36~-72 VDC or90~260vac@47-65 Hz Input Voltage (standalone) -36~-72 VDC or90~260vac@47-65 Hz 90~ Hz Consumption (Shelf type) 80W, nominal Consumption (Standalone) 5W nominal Remote Power Feeding from CO orrt HDTU02/HRM02 1-5

10 OAM&P RS-232, ASCII Terminal Window based network management system (SNMP PIotocol) Dimensions (HxWxD) Environment Shelf type Standalone Temperature Humidity 222mm x 437mm x 306mm 44mm x 431mm x 309.8mm 40mm x 200mm x 300mm 0 J~50 J 5%~95% 1.4 System components E1 HDSL W/DTE I/F system components include: 1. 19" shelf to accommodate 16 pieces of HDSL W/DTE I/F line cards or 15 pieces of HDSL W/DTE I/F line card and one piece of system main control unit (MCU) card. 2. The back board, which is installed behind the Shelf, to provide various connection interfaces (E1, FE1, RS-530) and an Ethernet interface, to match with the MCU line card installation, to provide for network function usage. The other includes power supply terminals etc. 3. The E1 HDSL W/DTE I/F line card, circuit line card includes the control office s card (known as COT or LTU), and remote line card (known as RT or NTU). The following sections of this manual will describe COT line card and RT line card. The COT line card and the RT terminal line card are different in program design. Therefore, when ordering, please specify. The COT line card and the RT terminal line card mainly consists of Line Control Board and transmission unit (XCVR). The line card s front panel provides the following maintenance and test functions: LED status screen: determine the system s operation conditions, base on the status displayed by LED Button for Loopback test: front panel provides two buttons for loopback test, can carry out local loopback test and remote loopback test. CID interface: connects personal computer s R S-232 serial interface and uses VT-100 terminal simulation program for system administration. 4. The system main control unit (MCU) possesses CID interface and Ethernet LAN interface. CID is a RJ-45 connector to connect the RS-232 interface of PC for HDTU02/HRM02 1-6

11 system administration. The correspondence chart showing the pin configuration converting RJ-45 to 9-Pin or 25-pin will be illustrated in chapter The 9.5" Half Size Stand Alone type E1 HDSL W/DTE I/F includes a 9.5" shell, containing a set of E1 HDSL W/DTE I/F line card. This product has a different package. However, its functions are the same as that of E1 HDSL W/DTE I/F. The front panel is equipped with LED indicator and CID interface. The back board is for the connection of E1 interface and HDSL signal. And, for stand alone type users, the choice of the interfaces has three types, includes FE1, V.35 and Ethernet interface. When ordering, please specify to the sales service personnel. Generally, the line card uses AC 110 V/220V 60Hz. If you use DC-48V power input, you need to specify it when you order. 6. Network Management System (EMS) You can purchase the network management system for administration of the entire machine s line card. The EMS is designed in compliance with the specification of network management system of SNMP. This system operates under Windows NT/98/95 etc. operating systems and executes EMS network management system via the Ethernet LAN interface of the MCU. This system also administers the entire E1 HDSL system and controls the working status of each line card through statistical and numerical analysis. We will describe each component s functions and roles in the next chapter. HDTU02/HRM02 1-7

12 Example of E1 HDSL W/DTE I/F System Connection HDTU02/HRM02 1-8

13 Chapter 2. Description of E1 HDSL W/DTE I/F system s functions 2.1 System structure To help users to build up a complete understanding about the E1 HDSL W/DTE I/F system, this chapter introduces the functions of all units of E1 HDSL W/DTE I/F system. It also introduces the concept of E1 Frame and Time Slots. And it describes how to assign time slot to use by specific DTE interface. Thereby allows you to obtain basic understanding about the operation principles of the E1 HDSL W/DTE I/F system. This chapter contains two parts. The first part introduces the system s hardware structure including description of all interfaces. The second part describes the structures of E1 Frame and Time Slots, and loop back command operation steps. 2.2 Shelf The shelf provided by Access Solution International Corporation contains up to 16 pieces of line cards, including 1 piece of MCU card and 15 pieces of E1 HDSL W/DTE I/F line card. The appearance, structure and assembly chart are shown as follows. Appearance of shelf Fig 2-1 shelf and appearance of E1 HDSL W/DTE I/F line card HDTU02/HRM02 2-1

14 Description of major functions and the specification of shelf Fans for ventilation and design of convection. Four fans are installed on the upper side of shelf for ventilation and stability of the system. This equipment is optional. If you need it, please specify when you purchase. Fig 2-2 design of fan on shelf The line card is installed in a plug-in way. Each line card operates ndependently. When you change line card, you don t have to shut down the entire system; just replace it. The system is designed in such a way that when you upgrade the system in the future, you don t have to change the shelf, just upgrade the line card. The fan control card supplies the power for the fan. Specification of the unit 1. Accommodates 16 pieces of line cards (1 piece of MCU and 15 pieces of E1 HDSL line card) 2. Dimensions: 222mm x 437mm x 306mm 2.3 Backboard The backboard located on the back of shelf accommodates various connection interfaces, including: HDTU02/HRM02 2-2

15 T1/E1 interface: provides two input signals for 120 Ohms Wire Wrap Pins and 75 Ohms BNC connector, respectively. FT1/FE1 interface: through 120 Ohms Wire Wrap Pins. HDSL Loop interface: through Wire Wrap Pins. EXT-CLK : Wire Wrap Pins for the input of the external synchronization clock signal. Power Input (DC Power In): for the input of DC 48V. RJ-45 Ethernet LAN interface: manages the network via the network management system. PF (Power Feed) pins: inputs power supplied when using remote power. Alarm Contact: dry contacts, incorporated in the system administration with the MCU card. This interface generates warning notices when warning message appears. Methods include output of audible warning and output of visible warning. Each method consists of major warning and minor warning. Major warning refers to the system s major error, such as interruption of loop signals, which causes the termination of normal operation and activates warning signals. Minor warning takes places when errors occur to system, but normal work is not affected. If the warning lasts for 5 seconds, the warning connection point will be activated according to the degree of warning. If the audible output is connected with a horn and visible output is connected with a warning light, the warning sound and warning light will be activated. You can press the ACO (Alarm Cut-Off) button on the front panel of the MCU card (at this time, ACO LED on the MCU will light) to stop the warning sound and turn off the warning. If another error occurs before the existing error is solved, the horn and lights will not be activated again. Until you push again the ACO push button switch (at this time the ACO LED on the MCU is off) to restore the alarm sound and alarm light functions. HDTU02/HRM02 2-3

16 Fig 2-3 The backboard of shelf The wire wrap pins of E1 and HDSL LOOP connect 26 AWG (0.4m/m) or 24 AWG (0.5 m/m) cable by knitting. In the next chapter, we will describe the installation. The backboard is locked on the shelf. Under normal circumstances, users do not have to disassemble it. If users need to repair due to malfunction, they may unscrew the screws around the backboard to remove the backboard. To plug in the card, insert the line card into the track on the front of shelf and push it into the connection chute of the backboard. The motion to remove the line card is reversal. 2.4 E1 HDSL W/DTE I/F COT line card and RT line card The E1 HDSL W/DTE I/F system works in pair. The customer side is called RT (Remote Terminal) terminal. The telecommunication office s side is called COT (Central Office Terminal) terminal. This section covers the functions of all components of RT side line card and COT side line card. As we mentioned in the previous section, line cards can be installed in a 19 shelf or shell of 19 stand alone type. We can observe the system s operation status by the LED indication on the board. HDTU02/HRM02 2-4

17 A. Indication of LED status LED layout on the board of line card PWR/ACT: On: system working Off: system malfunctions or no power Flash: (1) system is just activated and is conducting self-testing and connecting with the remote side, the LED will flash at a faster frequency; (2) if system is at stable operation conditions for a while, COT or RT terminal Alarm occurs, such as the history recorded values for the past 15 minutes exceed the settings of the Threshold Values, or there are serious errors such as HDSL LOS (Loss of Signal), or E1 LOS (Loss of Signal), the LED will flash at a slower frequency. DSL LP1: On: HDSL Loop1 lost synchronization or loop off-line Off: normal condition Flash: lost synchronization or off-line. System is re-connecting with remote side DSL LP2 : On: HDSL Loop1 lost synchronization or loop off-line Off: normal condition Flash: lost synchronization or off-line. System is re-connecting with remote side DTE (RTS) On: HDSL/DSU did not receive the RTS signal that DTE equipment sends out Off: Normal condition DTE (CTS) On: HDSL/DSU did not send out CTS signal notify DTE equipment Off: Normal condition FE1 ( LOS) On: LOS (Loss of Signal) occurred to FE1 interface Off: system in normal condition Flash: Frame Loss FE1 (ERR) On: BPV (Bipolar Violation), CRC Error, LCV (Line Code Violation) or error bit occurred to FE1 signals HDTU02/HRM02 2-5

18 Off: system in normal condition SLF TST: On: system under testing Off: system in normal condition Flash: System malfunction occurred LPBK (LOC): On: Use the push button on the front panel to execute Local Line Loop back (including DTE Loop back and D&I Loop back), or use CID program to execute Local Line Loop back command. Off: Normal condition Flash: remote side is executing Local loopback testing, or remote side is using CID program to execute Local Line Loop back testing command. LPBK (RMT): On : Use the push button on the front panel to execute Remote Line Loop back or use CID program to execute Remote Line Loop back command. Off: Normal condition Flash: remote side is executing Remote Line Loop back testing, or local side is using CID to execute Remote Line Loop back testing command B. Push-switch and connection interface on the board There are two push-switches and CID interface. LPBK (LOC): there is a push-switch below the LPBK (LOC) LED. Press it down with the pen-tip to execute the Local Line Loopback testing function. When this button is pressed down, the local side s LPBK (LOC) LED will be on. The remote side s LPBK (LOC) LED flashes. LPBK (RMT): there s a push-switch below the LPBK (RMT) LED. Press it down with the pen-tip to execute Remote Line Loopback test. When you press down this button, the system will request the remote side to reflect the received signals back. The LPBK (RMT) LED at the remote side flashes. The remote system s E1 Framer sends out AIS Code to advise the systems connecting to it. HDTU02/HRM02 2-6

19 CID: The other side connects computer s RS -232 interface by DB-9/25 Female connector. Can execute VT-100 terminal program, and adjust or sets up system configuration. Arrangement of the Pins for CID RJ 45 and DB-9/25 is shown in the following chart. RJ-45 8-Pin DCE Type functions of legs of DB-25/DB-9 RS-232 Female DCE Type non-simultaneousness transmission interface Pin Function Pin Function DB-25 Pin # DB-9 Pin # 1 RTS RTS 2 CTS 3 Reserved 4 Signal Ground 5 Receive Data (Out) 6 Transmit Data (In) 7 Reserved 2 CTS Reserved Signal Ground Receive Data Transmit Data Reserved 8 Reserved 8 Reserved RJ-45 and DB-9/25 Pin legs Fig 2-5 arrangement for C. HDSL XCVR Transmission module The XCVR module is installed on the circuit card as a sub-card. The E1 HDSL W/DTE I/F system transmits signals to the remote sides several kilometers away by the XCVR module. Major specifications of the XCVR: transmission power: 13.5 dbm Line Code: 64-CAP; Line Rate: 1168 Kbits/s Transmission technique: incorporates CAP modulation technique and uses ECH (Echo Cancellation Hybrid) method to provide duplex, double-looped transmission method. Functional Requirement: maintains the transmission quality require by CSA Loop 0 ~ Loop 8. The Bit Error Rate is less than HDTU02/HRM02 2-7

20 50 Pin Connector Trans-former Line Driver HDSL Loop A CAP Chip 50 Pin Connector Trans-former Line HDSL Loop B Driver CAP Chip Fig 2-6 HDSL XCVR Block Diagram D. Line Control Board, LCB This is the primary unit for E1 HDSL W/DTE I/F system. The major components include E1 Framer, microprocessor (CPU), HDSL Framer, power supply, and memory & system program. LCB is the primary component of E1 HDSL W/DTE I/F. XCVR transmission module connects LCB as a sub-card. To coordinate with the use of Ethernet interface, the Ethernet Board network sub-card shall be inserted in the LCB. If the Ethernet network card will be inserted, the Sealing Current sub-card can not be used. Otherwise, it can. The sealing current board transmits at least 15 ma current to HDSL Loop to reduce patina and rust so as to maintain quality of communication. The classifications of the sealing current board are by COT side and RT side. The current is transmitted from COT side and received on RT side as load. During maintenance, please do not hook up to the wrong side. When the sealing current board is installed on the LCB, please adjust the positions of SW3 and SW4 on LCB, as shown by table 2-1 & table 2-2. HDTU02/HRM02 2-8

21 HDSL/ E1 HDSL /DSU DSU HDSL W/DTE I/F framer Fig 2-7 block diagram of line control board (LCB) E. Ethernet & Sealing Current Module Ethernet Module Insert the Ethernet module on the LCB board, connect to the RJ-45 interface on the back board. It is a standard 10-BaseT specification, uses Bridge Mode application as the connection between two networks. The application speed of Ethernet interface can be changed and adjusted by the setting of time slot number. Such as, if there is a need for 512 K speed, then assign eight 64K time slots to be used by the Ethernet. If Ethernet sub-card is not necessary, then Sealing Current Board can be installed on the LCB. HDTU02/HRM02 2-9

22 The sealing current board transmits at least 15 ma current to the HDSL Loop 1&2 to reduce patina and rust so as to maintain quality of communication. The classifications of the sealing current board are by COT side and RT side. The current is transmitted from COT side and received on RT side as load. During maintenance, please do not hook up to the wrong side. When the sealing current board is installed on the LCB, and operates in remote power supply mode, it is necessary to adjust the positions of SW3 and SW4 on LCB of RT side and LCB side, as shown in table 2-1 and table 2-2. There are two switches on LCB board marked as SW3 and SW4. They are used for setup of sealing current board s installation on the system and power supply from the remote side. Please refer to the following table for setup: Switch Locations / status of usage SW3 Table 2-1 setup of locations for SW3 and SW4 at COT Status of power supply Uses local power supply and from remote side install (No Sealing Current Board is installed) Sealing Current Board RMT PWR RMT PWR Sealing_C Sealing_C SW4 RMT PWR RMT PWR Sealing_C Sealing_C Table 2-2 setup of location for SW3 and SW4 at RT Switch Locations / status of usage SW3 Status of power supply from remote side (No Sealing Current Board is installed) Uses local power supply and install Sealing Current Board Sealing_C RMT PWR Sealing_C RMT PWR HDTU02/HRM

23 SW4 RMT PWR RMT PWR Sealing_C Sealing_C NOTE: represents the location of switches. Sealing_C and RMT PWR are printed on the LCB and both ends of switch. Please be careful when you move the switch. 2.5 Stand Alone The system of stand alone possesses the same components as the system of the shelf type. Generally, the stand alone type is used at RT side most of the time. Under certain circumstances, you can specify COT side as stand alone when you purchase. The front panel of stand alone system is equipped with LED indicators. Its functions and significance are the same as that of line card as described in previous sections. The board is equipped with CID interface and LCD control panel, for setup of system administration. Fig 2-8 stand alone s board The backside of stand alone possesses interfaces of FE1, Ethernet LAN, V.35, HDSL LOOP and power supply input: Fig 2-9 backboard of stand alone Standard Stand alone uses 110V AC/220V AC, DC, or remote power supply. Please specify when you purchase. The backboard of stand alone is equipped with following interfaces or connectors: HDTU02/HRM

24 1. Input interface for FE1 signal: 120 Ohms wire wrap input terminal connects the E1 signal. This product may use the LCD or CID program to specify the Time Slot for FE1 interface to use. 2. Ethernet interface: Ethernet 10-BaseT LAN RJ-45 interfaces. The Ethernet function, provided by this product, may be seen as pass through type network bridge device, results in farther distance for the LAN. For example, the communication signals between two buildings can use the HDSL loop bridge to connect the LAN of both sides. During use, it can designate time slot number of the Ethernet interface. 3. The HDSL loop connector: connects the HDSL loops on both ends. 4. The V.35 interface Rused for the connection of terminal devices and through CID or LCD to specify slot number. 5. FG: Frame Ground, meaning grounding point Next table is the RJ-45 Pin Assignment Diagram Pin # Signal Name 1 RX ( Receive Ring ) 2 RX ( Receive Tip) 3 4 TX ( Transmit Ring) 5 TX ( Transmit Tip ) Table 2-3 RJ-45 Pin Assignment HDTU02/HRM

25 Next diagram is the functional description of the V.35 pins. Fig 2-10 Explanation of each pin of the V.35 Signal name Source Pin Shield A Transmitted Data DTE P S Received Data DCE R T Request To Send DTE C NC LL Clear To Send DCE D NC MM DCE Ready (DSR) DCE E NC HH DTE Ready (DTR) DTE H NC EE Signal Ground B Receive Line Signal Detect (DCD) DCE F NC KK Transmit Signal Timing DCE Y AA HDTU02/HRM

26 Receive Signal Timing DCE V X Local Loopback DTE L Remote Loopback DTE N NC DCE J Transmit Signal Timing DTE U W Test Mode DCE NN Table 2-4 V.35 Pins Functions Explanation 2.6 In-band code loopback test If E1 HDSL W/DTE I/F system detected a set of special code type in the Data Stream, it will execute loopback test. This function allows the telecommunication service company, using instrument, to send out from the COT side the designated special code type to execute the different loopback test. In band loopback test code is divided into Loop Up and Loop Down two types. The required loopback tests to be carried out are divided into four types, please refer to the following table for the combination. DTE D&I Local Loop Back Remote Loop Back Up: Up: Down: Down: Up:11000 Up: Down: Down: Table 2-5 In Band Test Code For example, if use the instrument connected to the DTE interface to send down code, when E1 HDSL DSU W/DTE I/F detected, then at the local side DTE interface returns the signal. To remove this instruction, then use the instrument to send down codes, removes the action of loopback. HDTU02/HRM

27 2.7 Design of functions for E1 HDSL W/DTE I/F loopback testing There are two operational models for the design of loop back testing of E1 HDSL W/DTE I/F. One model incorporates the push-switch [LPBK (LOC) and LPBK (RMT)] on line card front-panel, which stands for local line loop back and remote line loop back. The other model operates through CID command. There are 6 command selections, which is different from the in band loop testing procedure described earlier. The major difference is that these two operational models are set up and executed by users, no connection with the codes sent out by telecommunication office. No matter which item you execute, the original signal turns around at DTE or FE1 interfaces. Following is the description and explanation of these loop tests Execute loop back test via front-panel push-switch 1. LPBK (LOC): Local Line Loop Back Description of loop back: the user s location is called local end (LOCAL), turn the input signals transmitted into the system around at local side system s DTE and FE1 interface. As shown in the following diagram: HDSL LOOP DTE (V.35, Ethernet) COT RT DTE (V.35, Ethernet) FE1 FE1 Local Line Loop Back Fig 2-11 LPBK (LOC) local loop back test In this test, regardless you are at COT side or RT side, when you press the push-switch of LPBK (LOC) to execute the local loop back test, the LPBK (LOC) LED will be on, and the remote LPBK (LOC) LED will flash. HDTU02/HRM

28 2. LPBK (RMT) : Remote Line Loop Back When you press this switch, you will conduct remote line loop back test. At this time, the remote side will turn the signals around at remote side s Framer interface. The LED of LPBK (RMT) on the board will be on. The LED of LPBK (RMT) on the remote board will flash, meaning the system is conducting test. AIS signal will be sent out to notify other systems connecting to it. HDSL LOOP DTE (V.35, Ethernet) COT RT DTE (V.35, Ethernet) FE1 FE1 Remote Line Loop Back Fig 2-12 LPBK (RMT) remote loop back testing Use CID or LCD command to execute loopback test The TEST function in the command structure of CID provides 6 functions for loop test as follows : FE1 Local Line Loop back DTE Local Line Loop back Local Line Loop back (function is the same as front panel push switch LPBK(LOC)) Remote Line Loop back (function is the same as front panel push switch LPBK(RMT) ) V54 FE1 Remote channel Loopback V54 DTE Remote channel Loopback **NOTE RThe so-called local terminal is a relative terminology. It does not represent a COT side or a RT side. The base is the location the user signs in. If you use Local Login at the COT side, then the COT terminal is the so-called local terminal. Whereas, if you use Local Login at the RT side, then the RT site is the so-called local terminal. These loopback test instruction are described as follows HDTU02/HRM

29 1. FE1 Local Line Loop back Return the FE1 interface input signal to the original place before interface circuit. Refer to the following diagram. 2. DTE Local Line Loop Back Return the DTE interface input signal to the original place before interface circuit. Refer to the following diagram. The above two commands are applicable to the loopback commands carried out at the local terminal. Used to isolate signals at local terminal s DTE and FE1 interfaces. Let the system administrator personnel to determine if the signal source operates normally. 3. Local Line Loop Back Signals from the DTE or FE1 interfaces enter into the system. Before it comes out the HDSL loop interface, return the signals from the two interfaces back to the original places at the same time. The function of this command is the same as press front panel LPBK (LOC). Let the system administrator to determine if the HDSL LOCAL operates normally. Can let the signal be returned before the HDSL LOOP. E1 HDSL /DSU DTE Local Line Loop Back DTE Interface Local Line Loop Back Multiplexer Time Slots Assigner Line Driver Circuit HDSL Loop FE1 Local Line Loop Back FE1 Interface Fig 2-13 Various Loopback Tests at Local Terminal The following three loopback commands are applicable to carry out the remote terminal HDSL loopback test. When executing these commands, it shall use Remote Login to log into the remote terminal to carry out these commands. 4. Remote Line Loop Back The function of this command is the same as front board LPBK (RMT). As CID or LCD empty board executes this command, at the same time, signal is returned back before the FE1 and DTE interfaces of the remote terminal. The LEBK (RMT) LED on the system front panel of the local terminal will be on, and flash on the HDTU02/HRM

30 remote terminal. Remind the system management personnel that the loopback instruction is in progress. Local Remote E1 MDSL COT E1 MDSL RT DTE Interface FE1 Interface V54 DTE REMOTE CHANNEL LOOPBACK Multiplexer Time Slots Assigner Remote Line Loop Back Line Driver Circuit HDSL LOOP Remote Line Loop Back Line Driver Circuit V54 DTE REMOTE CHANNEL LOOPBACK Multiplexer Time Slots Assigner DTE Interface FE1 Interface V54 FE1 REMOTE CHANNEL LOOPBACK V54 FE1 REMOTE CHANNAL LOOPBACK Fig 2-14 Various Loopback Test Commands at Remote Terminal In addition, the system provides two types of V.54 code loopback test, the commands are: V54 FE1 Remote channel Loopback Activate to generate V.54 code, and send to the remote terminal through the HDSL LOOP. Because that the V.54 code can affect data transmission, therefore, only activate for two seconds. When detected the V.54 code, then carry out the V54 FE1 Remote channel Loop Back, return the signal before the FE1 interface of the remote terminal. V54 DTE Remote channel Loopback Activate to generate V.54 code, and send to the remote terminal through the HDSL LOOP. Similarly, only activates for two seconds. When detected the V.54 code, it will carry out the V54 FE1 Remote channel Loopback, return the signal before the DTE interface of the remote terminal. 2.8 FE1 Framer and Time slot settings When HDSL COT inputs signal to the E1 (FE1), you can, based on bandwidth requirement, specify time slot number to the E1 HDSL RT terminal s FF1 or DTE interface for use. For example, if a customer s requirement is 128 K data bandwidth, and 6 lines of telephone circuits, the time slot specifications are as follows: HDTU02/HRM

31 DTE I/F 0~31 Timeslot E1 HDSL/ DSU COT HDSL Loop E1 HDSL/ DSU RT 2x Timeslots FE1 G703 Interface 6x Timeslots FE1 G703 Interface Fig 2-15 Allotment of the Use of Time Slot The allotment of the time slot is related to the code frame format of the E1. The total number of E1 time slot is 32. The serial numbers are TS00 - TS31. TS00 and TS16 have special use. Under certain conditions, the TS00 is used as the FAW (Framing Alignment Word, synchronous byte) and CRC check code; and TS16 is used for the CAS command. The use rules of the E1 HDSL W/DTE I/F code frame format and time slot are as follows: Code Frame Format TS00 TS16 Unframe v v FAS x v FAS_MFAS x v FAS_CAS x x FAS_MFAS_CAS x x Table 2-4 The Use of E1 Code Frame and Time Slot **NOTE: X: cannot set up and use V: can set up and use The code frame formats of E1 have five types to choose from: FAS, FAS+CAS, MFAS+FAS, FAS+MFAS+CAS, and Unframe. The default is Unframe. Definitions of these five types of code frames are as follows: FAS: Use the zero time slot (TS00) to deliver Frame Alignment Word, FAW. MFAS+FAS: Use zero time slot (TS00) to deliver synchronous bytes and CRC check code. FAS+CAS: Use zero time slot (TS00) to deliver synchronous bytes check. And use the no. 16 time slot (TS16) to deliver signaling data. FAS+MFAS+CAS: Use TS00 and TS16 simultaneously to deliver the above FAW, CRC, CAS etc. data. Unframe: No code frame format HDTU02/HRM

32 Chapter 3. LCD Front Panel Control Function To set up the configuration parameters for the E1 HDSL W/DTE I/F, besides using the CID interface, use the LCD control panel is a very simple method. For the stand alone type, the E1 HDSL W/DTE I/F is equipped with the LCD control panel. The users only need to use four keys then may follow the commands on the LCD screen to set up all settings. 3.1 Functional Description of Front Panel Control Push Button Fig 2-1 E1 HDSL W/DTE I/F Front Panel There are a total of four keys on the front panel, their functions are as follows: 1. Left shift key, at the same lever of command selections, move the cursor to the left to the location of the command to be executed. 2. Right shift key, at the same lever of command selections, move the cursor to the right to the location of the command to be executed. 3. FUN The command for page change selection, or return to the previous level of command selections. 4. ENT The command for execution of the selected command, enter into the selections of the selected command, or return to the previous level of selections to proceed with set up work. 3.2 LCD Control Command Configuration The command to control the LCD front panel is configured through leveled approach. The LCD screen front panel displays only two lines, each line with 16 characters, and altogether 32 characters. Therefore, the same level of command group will be combined from different pages. HDTU02/HRM02 3-1

33 The system opening screen is E 1 H D S L W / D T E 0 0 : 0 0 : / 0 1 The system opening screen is the screen users see first. This screen provides mainly the system model number, time and date etc. information. On this screen, press any key to enter into the first level of the command structure. The first level command has 9 commands and composes of three pages. Main Menu Page 1 # C H - A s g n C l o c k D & I D T E Main Menu Page 2 # N e t w o r k L o o p b A k Q R S S T s t S y s t e m Main Menu Page 3 # A l a r m P e r f o r m Method to selection is as follows: FUN Key: Switch pages, the cursor stays at the first command of each page. A Key:Left and right shift key, to move the cursor to the next command, the initial position of the cursor is at the first command of the first level of command set, use right shift key to move the cursor to the right, can continue to the first command of the second page of the first level. The functions provided by the first level command are as follows: **NOTE: to save screen space, command appears on the LCD screen in a simplified manner. HDTU02/HRM02 3-2

34 Position of Command Command First Level CH-Asgn (Channel Assign ) First Level Clock First Level D&I (Drop / Insert ) First Level DTE First Level Network First Level Loopbak ( Loop Back ) First Level QRSStst First Level System First Level Alarm First Level Perform The Functional Description Assign the time slots (0 31) used by DTE and D&I (Drop Insert G.703 FE1) ports. Under this command, there are four pages of commands to be used to assign the time slot. Select the source of reference system time pulse. Set up various parameters for the Drop/Insert G.703 FE1 interface, and set up system performance monitoring threshold. Set up various parameters for the V.35/RS-449/Ethernet/X.21 DTE interfaces. Set up various system administration parameters of the HDSL LOOP. Execute loop loopback test. Generate the test code used for loopback test. Set up system time, load system parameters, the Smart Jack loopback test method, and set up reference time pulse source etc. Statistics for Nwk, Drop/Insert and DTE interfaces related ES and SES error data. Observe Nwk, Drop/Insert and DTE interfaces transmission performance. Under the 10 command selection, there are next level commands. This will be explained in the following sections. 3.3 CH-Asgn (Channel Assign) Command The Channel Assign command is provided to the user for time slot assignment. The user can arbitrarily assign DTE port and Drop/Insert FE1 port to use any time slot. However the use of zero and 16 time slots are different, based on the settings of the E1 Frame. At the first level of the command menu, move the cursor to the CH-Asgn command, press ENT key, then enter into the screen as below, the user may use the left/right keys to select time slot, then press ENT key to enter the next level, to select HDTU02/HRM02 3-3

35 the interface which will use that slot. A s s I g n : P a g e 1 ( ) T T T T T T T T Left/right keys select time slot, press ENT key, A s s i g n : C H 0 0 D T E ( ) T T T T T T T Select this time slot s interface. The items to select from are: T time slot for DTE port, such as V.35, RS-449. F means FE1. I this slot is available. U this slot is unavailable. To stop time slot set up, press FUN key to return to the previous level of screen. 3.4 CLOCK Command Select the source of system reference time pulse. When the communication system is at work, the system must have a unified synchronous signal reference source. Source Internal DTE FE1 Select the source of system reference time pulse. When the communication system is at work, the system must have a unified synchronous signal reference source. Generally, at the RT side the reference is the Recover Clock that is to hear the time pulse generated by data coming from HDSL LOOP. Most of the COT sides are installed at the communication bureau s machine room. Generally, it hears the time pulse signal coming from the upper level equipment. Here, the setting is FE1, this is COT side default setting. HDTU02/HRM02 3-4

36 Internal: in reference to the system internal OSC vibration generated time pulse signal. DTE: in reference to the time pulse sent by the DTE equipment connected to the HDSL. If this system breaks off, the system will automatically switch to Internal, reference system OSC generated tile pulse signal. FE1: In reference to FE1 input time pulse signal, If this system breaks off, the system will automatically switch to Internal, reference system 3.5 D&I Command Based on E1 HSDL, it provides customer a selectable standard G.703 FE1 interface. Its electric characteristic and E1 signal are the same. But the signals of the FE1 do not fill all 32-time slots. Each option and setting of the D& I commands provides mainly for the manager to set up interface parameters and system administration required data. When the above command appears on the LCD, you may use the left/right shift keys to move cursor to select the command to execute. At the same time, you may know the present settings of this command. D & I : F r m F o m t M F A S + F A S Left/right move cursor to select The present setting of this command After press "ENT" key to select command, use left/right keys to select settings. When complete, press "ENT" key to select, then return to the previous level. Then select command to continue on new set up operation. LCD command control and set HDTU02/HRM02 3-5

37 up is also based on this sequence to operate. D & I : F r m F o m t M F A S + F A S Use left/right keys to move cursor to select command settings, press ENT key to The input of numerical data for LCD command setting. If the settings of the LCD command require numerical type data, then follow this operation method to proceed. Under E1 command, there are six command settings, which require the input method described below. D & I : E S 1 5 M i n press FUN key return to Press ENT key to enter into numerical value D & I : E S 1 5 M i n Cursor stop at the first value, press ENT key to change value. Use the above screen as example, under the "ES15Min" command, the setting range is Therefore the hundredth number is set at 0 9. You can change among these three numbers. Same approach, if hundredth number is set at 9, the tenth number and the integers setting range is 0-9. When set up is completed, press FUN key and back to the "ES15Min" command level. Then use the left/right shift keys to select other commands to continue on set up operation. HDTU02/HRM02 3-6

38 Under D&I command, the command page list is as follows: Command Command/setting Function description E1\ Frame F (Frame FAS MFAS+FAS Set up the code frame format for E1, a total of four code frame formats, there meaning respectively Format ) MFAS+FAS+CAS are: FAS+CAS Unframe FAS: signal code frame carry Frame Alignment MFAS+FAS: signal code frame carry Frame Alignment, and CRC-4 check code MFAS+FAS+CAS: signal code frame carry Frame Alignment, and CRC-4 check code and CAS signal FAS + CAS : signal code frame carry Frame Alignment, and CAS signal Unframe: no signal code frame Line cd AMI Select E1 line code format (Line Code) HDB3 Idl Code When time slot is not in use, fill with Idle Code (Idle Code) default setting is Impednc 120 Select E1 interface input impedance value, unit (Impedance) 75 ohm ES15Mn 0 ~ 900 Summarize the number of seconds that error occur when system transmits messages via D&I Interface in 15-minute cycle. In telecommunication specification, the second that transmission error takes place is called ES (Error Second). The range of this value is 0 ~ 900. If the number of seconds that error bit occurs is higher than setting, the system generates warning. ES24Hr 0 ~ Summarizes the number of seconds that error happens when system transmits messages via D&I Interface in a 24-hour cycle. The range of this number is 0 ~ If the number of seconds that error bit occurs is higher than setting, the system generates warning. SES15Mn 0 ~ 900 Summarizes the number of seconds that severe error occurs when system receives E1 D&I signals in 15-minute cycle. In the telecommunication HDTU02/HRM02 3-7

39 specification, if the error bit rate is higher than 30%, or during the one second signal transmission, the Lost of Sync and Lost of Signal occur, this second is called SES (Severely Error Second). The range for this value is 0 ~ 900. If the number of seconds that error bit occurs is higher than setting, the system generates warning. SES24Hr 0 ~ Summarizes the number of seconds that severe error happens when system receives E1 D&I signals in a 24-hour cycle. The range of this number is 0 ~ If the number of seconds that error bit occurs is higher than the setting, the system generates warning. UAS15Mn 0 ~ 900 Un-Available Second records the number of invalid communication seconds in 15-minute cycle. UAS refers to the period from the time that 10 SES happens consecutively to the time that 10 non-ses occurs consecutively. This period is called UAS C UAS24Hr 0 ~ Records the number of Un-Available Second in 24-hour cycle. 3.6 DTE Command The DTE commands are primarily used in setting up various configurations of DTE interface. Coming out of factory, the DTE interface has several types, V.35, RS-449/530, Ethernet, X.21 etc. four types of interfaces. The user, at one time, can only use one interface. The table below shows the settings for DTE commands. Command Setting DTE\ Action Disable Enable IF Type V.35 RS449/530 X.21 Ethernet Tx CLK Internal External Function Description Set up DTE port Enable or Disable Select DTE port interface type, E1 HDSL W/DTE I/F back board provides various types of interfaces, respectively, V.35, RS 449/530, X.21 and Ethernet, set up based on type used. Set up the reference time pulse source of the DTE interface connected equipment. Default setting is HDTU02/HRM02 3-8

40 Internal. Means DTE equipment s synchronous time pulse refers to the time pulse signal send out by HDSL/DSU DTE interface. If the setting is External, then the HDSL W/DTE I/F refers to the time pulse sent by DTE equipment. Rate ClokInv (Clock Inver) DataInv (Data Inver) Nx56K Nx64K Disable Enable Disable Enable Set up DTE port interface speed calculation method, one use 56 K as time slot calculation unit, the other uses 64 K as time slot calculation unit. Set up the phase of the time pulse (default setting is Disable). If there are difference between the HDSL W/DTE I/F provided signal phase and the transmission data phase, use this command to adjust. In general, the most usable situation is that when the connection cable of the equipment between HDSL W/DTE I/F and DTE is too long and results in data error, then the time pulse position can be adjusted. Set up the phase of data sent out by the DTE interface, (default setting is Disable), determined by basing on the design of equipment, use positive logic or negative logic. The operation method of using the LCD control front panel to control DTE interface is the same as previous procedure. Select DTE command, push the "ENT" key, and enter into the command selection page under DTE command. D T E : A c t i o n D i s a b l e Enter DTE command, may use left/right shift keys to select D T E : A c t i o n D i s a b l e Press ENT key, enter into the command setting display, may use left/right set up. The rest of the command settings uses this method to proceed with selection and HDTU02/HRM02 3-9

41 3.7 Network Command The Network command is applicable mainly for the set up of HDSL LOOP administration required parameters. It is used to control and judge transmission quality related monitoring and control in the HDSL loop. When HDSL W/DTE I/F on line transmission is in progress, if the actually generated data are higher than the settings, the system will send out alarm signal. The meaning of settings for Network commands is as the following table. Network \ Setting Function Noise m OFF (0 db) Set up the signal to noise margin. If the system (Noise margin) ~ + 15 db detected that the signal to noise margin of the HDSL loop is lower than the setting, system will send out alarm signal. Representing that the noise margin is too high, it will effect the quality of communication. Use Space bar key to select the value you want, from off (0 db ~ 15 db), add one db each time. The default setting is 3 db. ES15mn 0~900 Summarize the number of seconds that error occur when system transmits messages via HDSL LOOP in 15-minute cycle. In telecommunication specification, the second that transmission error takes place is called ES (Error Second). The range of this value is 0 ~ 900. If the number of seconds that error bit occurs is higher than setting, the system generates warning. ES24hr 0~65535 Summarizes the number of seconds that error happens when system transmits messages via HDSL LOOP in a 24-hour cycle. The range of this number is 0 ~ If the number of seconds that error bit occurs is higher than set value, the system generates warning. SES15mn 0~900 Summarizes the number of seconds that severe error occurs when system transmits signals via HDSL LOOP in 15-minute cycle. In the communication specification, if the error bit rate is higher than 30%, or during the one second signal transmission, the Lost of Sync and Lost of Signal occur, this second is called SES (Severely Error Second). The range for this value HDTU02/HRM

42 is 0 ~ 900. If the number of seconds that error bit occurs is higher than set value, the system generates warning. SES24hr 0 ~ Summarizes the number of seconds that severe error happens when system transmits messages via HDSL LOOP in a 24-hour cycle. The range of this number is 0 ~ If the number of seconds that error bit occurs is higher than the set value, the system generates warning. UAS15mn 0~900 Un-Available Second records the number of invalid communication seconds in 15-minute cycle. UAS refers to the period from the time that 10 SES happens consecutively to the time that 10 non-ses occurs consecutively. This time period is called UAS C UAS24hr 0~65535 Records the number of Un-Available Second in 24-hour cycle. HDSL LOOP Transmission Quality Management Related Parameters 3.8 Loopbak (Loop Back) command The Loopbak (Loop Back) test command on the LCD control front panel includes the following several selections. Among them, the first four items have been discussed in Chapter 2. FE1 Local Line Loop back (LCD abbreviated FE1LB) DTE Local Line Loop back (LCD abbreviated DTELB) Local Line Loop back (Function is the same as the front panel push button LPBK(LOC)) (LCD abbreviated LLB) Remote Line Loop back (Function is the same as the front panel push button LPBK(RMT)) (LCD abbreviated RLB) V.54 FE1 Remote Pay Load Loop back ( LCD abbreviated V.54FE1) V.54 DTE Remote Pay Load Loop back ( LCD abbreviated V.54DTE) The first four functions have been discussed in Chapter 2. Therefore the use discussion are only provided for the last two. HDTU02/HRM

43 V.54 FE1 Remote channel Loop back ( LCD abbreviated V.54FE1) Activate to generate V.54 code, and send through the HDSL LOOP to the remote terminal. Since the V.54 code affects the transmission of data, therefore only activates for two seconds. It then executes the FE1 Remote channel Loop Back, returns the signal before the remote terminal s FE1 interface. V.54 DTE Remote channel Loop back ( LCD abbreviated V.54DTE) Activate to generate V.54 code, and send through the HDSL LOOP to the remote terminal. Similarly, only activates for two seconds. If detected the V.54 code, it then carries out the DTE Remote channel Loop Back, returns the signal at the remote terminal s DTE interface. Similarly there are three settings, will not repeat. 3.9 QRSSTsT (QRSS Test) Command The E1 HDSL/DSU system design provides QRSS test code. When activated, the two terminals connected to each other and send out test codes, and summarize error code receiving margin. QRSSTst\ Setting Function QRSS OFF OFF: do not execute QRSS test code test action ON On: start to execute QRSS test code QRS BER Summarize received QRSS code error margin 3.10 System Command The System command for the E1 HDSL W/DTE I/F is mainly to provide system time set up, load system parameter, the Smart Jack loopback test method, and set up reference time pulse source etc. Enter the System command of the LCD, use left/right shift key to select the command to be executed, when confirmed, press the ENT key. Similarly for the settings of the selected command, use the same operating method. HDTU02/HRM

44 Command Setting Description System \ LP Act LP1 Active Users can choose required DSL ports, but it (Loop active) LP2 Active should LP1&LP2 Active Match the hardware. Ts Time (Test Time) Enable Disable Set up the automatic stop time when system is testing. The unit is in minutes. Ts(min) Default setting is Range 0~129 (Time Out) 10 minutes FE1 smj Enable Disable Enable: set up at the FE1 interface to detect Smart Jack (In-Band Code Loop Back Test ) loop test code. If detected, then start to execute loop back test. Disable: turn off this function. DTE smj Enable Disable Enable: set up at the DTE interface to detect Smart Jack (In-Band Code Loop Back Test ) loop test code. If detected, then start to execute loop back test. Disable: turn off this function. LoadFct Yes No Load in the default settings when the product coming out of factory. LoadUsr Yes Load in the configuration set up by the user. No SaveCur Yes No Save the transmission configuration the system is using at this time. Time xx: xx : xx Set up time Date xx/xx/xxxx Set up date 3.11 ALARM Command Used to observe the alarm occurrence data of the system PERFRM (Performance) Command Used to observe FE1 and HDSL Loop transmission performance statistics. The primary observation data are as follows: HDTU02/HRM

45 PERFORM \ Setting Performance NWK Err (NWK Error) NWK Per (NWK Performance) FE1 Err (FE1 Error) ES-LCV ES-LCV: error seconds caused by line code violation. ES-CRC ES-CRC: error seconds caused by CRC SES SES: transmission second count of severe error UAS occurrence. UAS: un-available transmission second count. Observe line quality (if greater than 3 db, guarantee transmission quality normal.) ES ES-LCV: transmission error second count. SES SES: transmission second count of severe error UAS occurrence. FEBE UAS: un-available transmission second count. FEBE: number of times FEBE (Far End Block Error) occurred. Included in this chapter is the complete introduction of using LCD control front panel provided commands to perform the set up of various configurations of system transmission. In the next chapter, it will introduce the use of CID interface, the use of VT-100 terminal simulation program to perform system administration and set up. HDTU02/HRM

46 Chapter 4. Use CID Program to Set up System Configuration In the previous chapter, we introduced the use of LCD control interface provided commands to carry out system configuration or test functions. In this chapter, we introduce the use of CID program to carry out system configuration or test functions. When you receive your E1 HDSL W/DTE I/F system, you need to connect the wires first. On the backboard of E1 HDSL W/DTE I/F you can find the names for all interfaces. You have to hook up the system correctly for the system to start work normally. 4.1 Preparation of User Environment Prior to set up, check whether the software and hardware are complete: One personal computer. RS-232 communication interface is the only requirement for hardware. It is connected to the CID interface (RJ-45 connector) of HDTU02/HRM02. This type of connecting cables, if order from our company, the parts numbers are P-OP-CB-02 (RJ-45 converting to DB-9 Female 180CM network cable) and P-OP-CB-03 (RJ-45 converting to DB-25 Male 180CM network cable.) In software, it has to have compatible VT-100 terminal program. You can use the terminal program included in Windows 95. This program is located under program/affiliated applied program. But, if you use the terminal program under the Chinese version of Windows, some keyboard codes may not match operation. Therefore, we recommend to use Telix, PCPlus etc. terminal program. The operation will be smoother. **Note: If you use standard VT 100 terminal program, connect it to CID interface to make sure that CID program is executing correctly. If you use the terminal program included in Chinese Windows 95/98, use the number keys to control the direction of cursor s movement. Press the Num Lock on the right keyboard, and then use 8,6,4,2 to move the cursor. Set up the parameters of terminal program as follows Set up the transmission speed of RS-232 at 9.6 kbps HDTU02/HRM02 4-1

47 Set up the length of bit at 8; Set up Parity at None; Set up Stop Bit at 1 Use RS-232 Cable included in E1 HDSL W/DTE I/F to connect CID interface of HDTU02/HRM02 to the RS-232 interface of personal computer. After the above preparation work, proceed to setup the system configuration. 4.2 E1 HDSL W/DTE I/F Preparation Work Before Connection Now you are opening the package of the machine. Depending on the type of machines you purchased there are some differences between the E1 HDSL line card of 19 shelf and stand alone tabletop model. We have discussed these two models in chapter 2. Please read carefully before wire connection. Before you proceed with the wire connection installation work of the E1 HDSL W/DTE I/F, please check all items listed in following table to make sure that all circuits or cables are correct. Pay special attention to power source and grounding, to prevent the line card from being hit by electric leakage. Item Check List 1 Check whether HDSL Loop has Loading Coil? Loading Coin has too be removed. 2 Be sure to use single-pith copper wire. Do not use twisted wire. 3 Make one end of the HDSL loop short-circuited. Measure Ohm value on the other end by a multi-meter. The value has to be less than or equal to 900 Ohms. When exceeding this value, there is no guarantee that both ends can communicate. 4 Check Frame Ground. In the process of installation, be careful of the connection of frame ground to prevent from being hit by static or electric leak. Connect the frame ground provided by the system to the joint connecting point of machine room. Attention please. If the grounding line is not connected, and the Line and Nature of the AC power supply connected erroneously, the system may be damaged. Table 4-1 preparation work before installation HDTU02/HRM02 4-2

48 4.3 CID Command Configuration After circuits are connected, you can proceed to setup the system program. This step deals with the setup of various communication configurations for E1 HDSL W/DTE I/F. Just like communication between human beings, the communication between COT side of the E1 HDSL W/DTE I/F and RT side has to understand the signals sent out from each other. Therefore, the procedures for setup of configuration are very detailed. Naturally, the company provides a set of default settings prior to shipment of product, to meet most of user s needs with the least setup. The CID command of E1 HDSL W/DTE I/F is a tree structure and is designed in a menu-driven manner, which allows users to select the function for execution easily. The upper left corner of screen displays the command s current location. Thus, you always know where you are. We have included a list containing the CSU DATASTRUCE TREE STATUS TEST CONFIGURATION MANGEMENT SNMP QUIT ALARM QRSS TEST Load Factory Lo_Fac CHANHE IDENTIT Y system name system location LOC. LOG IN system contact Network PER. LOAD USER Lo_Fac Modify Account login ID new password REM. LOG IN Confirm Password EDIT DEVICE CON. TEST E1 D&I ACTION FORMAT FAS,MFAS,CAS, D&I LINE CODE HDB3 OR AMI FORMAT FAS,MFAS,CAS, PER. Impedance 120ohm OR 75ohm LINE CODE HDB3 OR AMI DES15T ES 15 MIN Impedance 120ohm OR 75ohm LOOP DTE PORT DES24T ES 24 HOUR IDLE CODE FF OR 7F BACK D&I PORT DSES15T SES 15 MIN DES15T_F ES 15 MIN LOCAL DSES24T SES 24 HOUR DES24T_F ES 24 HOUR LOCAL LINE DUAS15T UAS 15 MIN DSES15T_F SES 15 MIN LOCAL PAYLOAD V.54 REMOTE DUAS24T UAS 24 MIN DSES24T_F DUAS15T_F SES 24 HOUR UAS 15 MIN V.54 (DTE1) DTE ACTION D_Type V.35 RS DUAS24T_F UAS 24 MIN V.54(D&I) D_Rate 56K OR 64K D_INV_C dte inversion clok D_INV_D dte inversion data RTS_ACT RTS EN/DIS DSR_ACT DSR EN/DIS Chan0chan1 chan16chan17 chan2chan3 chan18chan19 chan4chan5 chan20chan21 channel BYPASS chan6chan7 chan22chan23 BLOCK chan8chan9 chan24chan25 ASSIGN chan10chan11 chan26chan27 chan12chan13 chan28chan29 ABORT DTE START chan14chan15 chan30chan31 TEST DTE COUNT Dis..LED Identity LOC ON/OFF/FLAS system name system location D&I START D&I COUNT IDLE START IDLECOUNT system contact soft version System hard version e1-framer h-framer product name CLOCKSR TIMEOUT TESTTIME SDATE[4] STIME[3] CLOCK SOURCE/EXT. ACTION DISPLAY DATE DISPLAY TIME setup of system parameters in previous chapter. If you desire to set up a certain parameter, you can refer to that list. Fig 4-2 CID command structure diagram for E1 HDSL W/DTE I/F HDTU02/HRM02 4-3

49 4.4 CID Program Login Screen After all preparations are completed, you can execute terminal program and start up You will see the first screen in the terminal program after entering into E1 HDSL W/DTE I/F system: Fig 4-3 first screen after entering into system On this screen, you can select either local login or remote login. ID and password are required when you login, regardless you are at local side or remote side. Fig 4-4 login into system **Note: When coming out of the factory, the default system the system has a default HDTU02/HRM02 4-4

50 ID and password They can be changed right after entering the system. System administrator inputs login ID and password in the input fields shown on screen of Fig 4-4. Upon confirmation, you can start administering E1 HDSL W/DTE I/F and set up all items. Prior to shipment, a set of login ID and password is provided for the E1 HDSL W/DTE I/F user. You can use this ID to administer the system, or you can change the password. Be especially careful when you modify the password. You have to remember the new password, or you will not be admitted into the system. The E1 HDSL W/DTE I/F system allows remote login. The system allows one user to enter at a time. If there is a user in the local side, login will not be allowed from the remote side. 4.5 Main Screen and Display Function Description Input your user name and password correctly, system displays the main menu: Fig 4-5 Main Menu This is the most important entrance point to the system program. We select the function to be executed from this screen, then enter into the screen of that function. Prior to use the main menu, make sure you understand all meanings of the screen. On the lower portion of the screen are the function keys for your use. Their HDTU02/HRM02 4-5

51 meanings are as follows: ESC: Prev. leave current screen and return to previous screen S-M: Main Shift + M Mmeans to press and hold Shift key, then press M key to return to the main menu. S-S: Save Config. Shift + S, write and save the system s current default settings into ROM. The system will then function in according to the new default settings. Backspace: Del delete the character before the cursor UpDn: Select Item select fields for setup : Move Cursor move cursor in the field Space: Change Value select the number in the field by space bar Enter: Select/Column either to enter into the next level of menu or confirm your selection Let s take a look at the lower left corner of the screen. Some instructive messages may appear here to indicate the possible actions can be executed at the present. The lower right corner is the area to display warning or error messages. When system detects problems, this corner will display relevant messages for maintenance references. 4.6 Enter Configuration Screen Fig 4-6 Configuration Screen HDTU02/HRM02 4-6

52 There are three selections in the Configuration screen: Load Factory Configuration Press Enter to confirm the execution of this selection. All field values will become the default settings at shipment. If you desire to resume to the factory default settings, you need to press Shift + S to save all values Load User Configuration At shipment, the system s ROM records the default configuration settings. These settings cannot be changed. When you execute the first selection, these default settings will be read. If the default settings cannot meet the user s requirement, user may go ahead to set up new values on the fields that he/she intends to change. After they are saved, the system will consider these data as user configuration. When you choose second selection load user configuration, the data modified most recently will be re-loaded. Selections 1 and 2 allow you, while your are operating the system set up and abnormal setting occurs, to restore to the factory default settings or the original normal operation settings Edit/Display Configuration Move the highlight bar to selection 3 and press Enter key to activate the following screen: HDTU02/HRM02 4-7

53 Fig 4-7 editing screen for system configuration There are five selections under this functional screen: Network: set up various configurations for HDSL LOOP FE1: set up various configurations for FE1 interface signal DTE Port Interface : set up various configurations for DTE interface Channel Assign: assign time slot distribution System: set up system parameters for E1 HDSL W/DTE I/F Set up the System Parameters Hold the highlight bar on first selection and press Enter to enter into the following screen: Fig 4-8 Configuration/Edit/System Set Up Screen Under this screen, the various set up items and settings are shown as the following table: Set Up Field Settings LP Act LP1 Active (Loop active) LP2 Active LP1&LP2 Active Clock Source Internal DTE FE1 Description Users can choose required DSL ports, but it should Match the hardware. Select the source of system reference time pulse. When the communication system is at work, the system must have a unified synchronous signal HDTU02/HRM02 4-8

54 reference source. Generally, at the RT side the reference is the Recover Clock that is to hear the time pulse generated by data coming from HDSL LOOP. Most of the COT sides are installed at the communication bureau s machine room. Generally, it hears the time pulse signal coming from the upper level equipment. Here, the setting is FE1, this is COT side default setting. Internal: in reference to the system internal OSC vibration generated time pulse signal. DTE: in reference to the time pulse sent by the DTE equipment connected to the HDSL. If this system breaks off, the system will automatically switch to Internal, reference system OSC generated tile pulse signal. FE1: In reference to FE1 input time pulse signal, If this system breaks off, the system will automatically switch to Internal, reference system Test Time Out Enable Disable Set up the automatic stop time when system is testing. The unit is in minutes. The default setting is 10 minutes. Test Duration 0 ~ 99 Set up the automatic test terminating time. The (min) default setting is 10 minutes. Date xx/xx/xxxx Set up date Time xx: xx : xx Set up time FE1 Smart Jack Enable Enable Disable Enable: set up at the FE1 interface to detect Smart Jack (In-Band Code Loop Back Test ) loop test code. If detected, then start to execute loop back test. Disable: turn off this function. DTE Smart Jack Enable Enable Disable Enable: set up at the DTE interface to detect Smart Jack (In-Band Code Loop Back Test ) loop test code. If detected, then start to execute loop back test. Disable: turn off this function. HDTU02/HRM02 4-9

55 Set up Time Slot use Channel Assign The Channel Assign command is provided to the user for time slot assignment. The user can arbitrarily assign DTE port and Drop/Insert FE1 port to use any time slot. However the use of zero and 16 time slots are different, based on the settings of the E1 Frame. The DTE types include V.35, RS-449/530, X.21, Ethernet. Use the Type selection under DTE command to set up its type. Select Channel Assign command and enter into the following screen: Fig 4-9 Set up the use of time slot This screen is mainly used by the system administrator to assign the time slots used by DTE and D&I ports. It can be assigned as one group, DTE or D&I. It can also be assigned individually by move the cursor to each time slot. In the above screen, to assign the time slots as one group to be used by DTE or D&I, you need only to enter the starting time slot value and ending time slot value. For example, if you want to assign the DTE port to use the No. 1 to No. 4 time slots, then you enter the following values on the first row of the screen: DTE Block Channel Assign Start: 1 count 4 On the screen, DTE will appear in the No. 1 to the No. 4 time slot. This means that these four time slots are used by DTE interface. If each time slot uses 64K, then HDTU02/HRM

56 the speed of the DTE port is 256K. The Block Channel Assign method for the D&I port is the same as above. If you want to assign each time slot individually, you move the cursor to the time slot number, then use the Spacebar to select the interface to be used by this time slot. There are three selections. They are DTE, D&I, and, and Idle. The meanings are as follows: DTE, the time slots is used by DTE interface. D&I, means FE1. Idle, means not used time slots. After selection, move to the next time slot assignment and continue on set up. If U/A character appears in No. 00 and No. 16 time slots, this means that they cannot be used because that they are used by the system Set up D&I E1 interface Configuration and Management Parameters Enter the D&I E1 set up screen and set up the required parameters for management and communication configurations of that interface. Fig 4-10 Set up D&I E1 Interface HDTU02/HRM

57 Under this screen, the set up description for each field is as the following table. D&I E1 Command/Settings Functional description Frame FAS Set up the code frame format for FE1, a total of Format MFAS+FAS four code frame formats, there meaning MFAS+FAS+CAS respectively are: FAS+CAS FAS: signal code frame carry Frame Unframe Alignment MFAS+FAS: signal code frame carry Frame Alignment, and CRC-4 check code MFAS+FAS+CAS: signal code frame carry Frame Alignment, and CRC-4 check code and CAS signal FAS + CAS : signal code frame carry Frame Alignment, and CAS signal Unframe: no signal code frame Line Code AMI Select FE1 line code format HDB3 Idle Code When time slot is not in use, fill with Idle Code default setting is Impedanc 120 Select E1 interface input impedance value, unit ohm e 75 ES 15 Minutes 0 ~ 900 Summarize the number of seconds that error occur when system transmits messages via FE1 Interface in 15-minute Threshold cycle. In telecommunication specification, the second that transmission error takes place is called ES (Error Second). The range of this value is 0 ~ 900. If the number of seconds that error bit occurs is higher than setting, the system generates warning. ES 24 Hours 0 ~ Summarizes the number of seconds that error happens when system transmits messages via FE1 Interface in a Threshold 24-hour cycle. The range of this number is 0 ~ If the number of seconds that error bit occurs is higher than setting, the system generates warning. HDTU02/HRM

58 SES 15 Minutes Threshold SES 24 Hours Threshold UAS 15 Minutes Threshold UAS 24 Hours Threshold 0 ~ 900 Summarizes the number of seconds that severe error occurs when system receives E1 D&I signals in 15-minute cycle. In the telecommunication specification, if the error bit rate is higher than 30%, or during the one second signal transmission, the Lost of Sync and Lost of Signal occur, this second is called SES (Severely Error Second). The range for this value is 0 ~ 900. If the number of seconds that error bit occurs is higher than setting, the system generates warning. 0 ~ Summarizes the number of seconds that severe error happens when system receives E1 D&I signals in a 24-hour cycle. The range of this number is 0 ~ If the number of seconds that error bit occurs is higher than the setting, the system generates warning. 0 ~ 900 Un-Available Second records the number of invalid communication seconds in 15-minute cycle. UAS refers to the period from the time that 10 SES happens consecutively to the time that 10 non-ses occurs consecutively. This period is called UAS C 0 ~ Records the number of Un-Available Second in 24-hour cycle Set up all HDSL LOOP Communication Management Parameters This screen sets up the data for monitoring of communication quality in the HDSL loop. When circuits in communication and actually generated data are higher than the settings, the system will give out warning message. HDTU02/HRM

59 Fig 4-11 Set Up Various Parameters for HDSL LOOP The settings and meanings for each field is as the following table. Set Up Field Value Function Noise Margin OFF (0 db) Sets up the value of signal noise margin. If the SNR of Threshold ~ + 15 db HDSL loop detected by system is lower than the set value, the system will generate warning message. This means that the noise margin is too high. Use Space bar to select the value you desire. From off (0dB), one db value is increased each time. ES 15 minute threshold 0~900 Summarize the number of seconds that error occur when system transmits messages via HDSL LOOP in 15-minute cycle. In telecommunication specification, the second that transmission error takes place is called ES (Error Second). The range of this value is 0 ~ 900. If the number of seconds that error bit occurs is higher than set value, the system generates warning. ES 24 hours threshold 0~65535 Summarizes the number of seconds that error happens when system transmits messages via HDSL LOOP in a 24-hour cycle. The range of this number is 0 ~ If the number of seconds that error bit occurs is higher than set value, the system generates warning. HDTU02/HRM

60 SES 15 minute threshold SES 24 hours threshold UAS 15 minutes threshold UAS 24 hours threshold 0~900 Summarizes the number of seconds that severe error occurs when system transmits signals via HDSL LOOP in 15-minute cycle. In the communication specification, if the error bit rate is higher than 10 3, this second is called SES (Severely Error Second). The range for this value is 0 ~ 900. If the number of seconds that error bit occurs is higher than set value, the system generates warning. 0 ~ Summarizes the number of seconds that severe error happens when system transmits messages via HDSL LOOP in a 24-hour cycle. The range of this number is 0 ~ If the number of seconds that error bit occurs is higher than the set value, the system generates warning. 0~900 Un-Available Second records the number of invalid communication seconds in 15-minute cycle. UAS refers to the period from the time that 10 SES happens consecutively to the time that 10 non-ses occurs consecutively. 0~65535 Records the number of Un-Available Second in 24-hour cycle. As you have completed configuration setup for the HDSL W/DTE I/F. The system can start communication operation. The next items are the system management, performance observation and simplified system test etc. operations necessary for the system administrator. In the next chapter, we will discuss HDSL W/DTE I/F system administration (Management) Set up all DTE Interface Parameters and Communication Configuration The DTE command is mainly used to set up various DTE interface configuration. When coming out of the factory, the E1 HDSL s DTE interface has several types, V.35, RS-449/530, Ethernet, X.21 etc. four type of interfaces. The user can only use one interface at a time. HDTU02/HRM

61 Fig 4-12 Set up of various parameters for DTE interface The following table is the description of various settings for DTE command. DTE Setting Function Description Action Disable Enable Set up DTE port Enable or Disable Port Type V.35 RS449/530 X.21 Ethernet Select DTE port interface type, at the backboard of the E1 HDSL W/DTE I/F, there are several type of interfaces, they are V.35, RS 449/530, X.21 and Ethernet. Set up based on the type used. Data Rate Nx56K Nx64K Set up DTE port interface speed calculation method, one uses 56 K as time slot calculation unit, the other uses 64 K as time slot calculation unit. Tx Clock Internal External Set up the reference time pulse source of the DTE interface connected equipment. Default setting is Internal. Means DTE equipment s synchronous time pulse refers to the time pulse signal send out by HDSL W/DTE I/F DTE interface. If the setting is External, then the HDSL W/DTE I/F refers to the time pulse sent by DTE equipment. Invert Clock On Off Set up the phase of time pulse signal sent out by the DTE interface, (default setting is Disable), determined by basing on the design of equipment, use positive logic or negative logic. If there are difference HDTU02/HRM

62 Invert Data On Off between the HDSL W/DTE I/F provided signal phase and the transmission data phase, use this command to adjust. In general, the most usable situation is that when the connection cable of the equipment between HDSL W/DTE I/F and DTE is too long, results in data error, the time pulse position may be adjusted. Set up the phase of data sent out by the DTE interface, (default setting is Disable), determined by basing on the design of equipment, use positive logic or negative logic. HDTU02/HRM

63 Chapter 5. System administration (Management) This chapter provides the identification data and users for system administrators to manage the E1 HDSL W/DTE I/F system. Prior to shipment, this system will provide a user s ID and password to user. User may change ID and password by the functions described in this chapter. On the main menu, choose Management to enter into the screen of management functions. 5.1 Screen of system administration Following is the screen for system management. This screen provides two selection functions for choice: Fig 5-1 Management screen 5.2 Change system s identification data (Change Identity) Select the first function to change the system s identity. When E1 HDSL W/DTE I/F is included in the network and becomes the provider of communication service, you can use this information to confirm the system name and location of the device. If the installation location is changed, you can use this function to correct data. HDTU02/HRM02 5-1

64 Fig 5-2 Change Identity Screen In this screen you can use the keyboard to enter: System Name System Location System Contact system name. You can input a name easy to remember. After a number of systems are installed, you can use this name for identification of the system you are looking for. location of the system, which marks the exact location the system is installed. input the personnel for system administration for future contact. 5.3 Modify system user s account The last function is the modification of user s account information, including change of name & password. Same as the procedure described in the previous section, confirmation is the last step for the modification described in this section. Upon shipping, the system will be provided with a universal ID and password. After installation and setup of this system, we suggest the system administrator to change ID and password so as to prevent mistakes generated by irrelevant personnel from happening. HDTU02/HRM02 5-2

65 Fig 5-3 Modify User s Account In the next chapter, we will discuss how to observe the system s operation. Based on the statistical data generated by the operation of the system, we can determine the system and circuits current transmission status. Then we can adjust the system configuration, according to the figures provided by the system, to obtain best setup for the transmission function. HDTU02/HRM02 5-3

66 Chapter 6. System alarm and performance statistics (Status) In the previous chapters, we described how to set up and administer E1 HDSL W/DTE I/F system. Generally, these operations are mandatory procedure after first installation of E1 HDSL W/DTE I/F. Now we are going to introduce how to observe the system s operation. In the main function screen, select Status to enter into following screen: Fig 6-1 Status function selection There are 4 selections under this screen: Alarm Observe the warning messages generated by the system. Performance Statistics Observe the statistical data regarding system s functions Display LEDs Display the present status shown on LED of the front panel Identity Display the system s firmware/hardware messages Table 6-1 Status description of function selections 6.1 Alarm warning message After E1 HDSL W/DTE I/F starts working, this function will allow system maintenance personnel to observe the warning messages generated by E1 HDSL W/DTE I/F. The screen is as following: HDTU02/HRM02 6-1

67 Fig 6-2 Alarm warning message screen This screen provides the following warning items Device Fault: HDSL system s important component malfunctions DC Fault: problem with DC power supply SNR Alarm: HDSL LOOP signal noise margin is lower than the setting Attenuation Failure: HDSL LOOP signal level attenuation exceeds the setting LOSW Failure: HDSL LOOP lost synchronization bits, signal cannot be synchronized BER Alarm: Bit Error Rate too high E1 LOS Alarm: lost E1 signal E1 ERR Alarm: excessive high BER for E1 signals The maximum number of record is 13. If the storage space is full, the system will discard the earliest warning message automatically. In addition, when warning occurs, the most severe message will appear dynamically on the lower right corner of the screen. The display rules are as following: Display format: Date device name warning message status HDTU02/HRM02 6-2

68 The meanings for these 4 fields are as follows: Date: week day/month/day/time/year Device name: include LP1, E1, meaning, respectively, the source of this warning message comes from Loop 1 or E1 interface. Warning message: displays warning message. Relevant messages to the warning items are listed on the previous page. Status: happened/cancelled Display priorities for the warning messages are as follows (Display priorities for the remote side is same as local side. However, the local side displays local warning preferentially.) Date device name warning message status LP1 DEVICE FAULT CANCELLED LP1 DC FAULT HAPPENED LP1 SNR ALARM CANCELLED LP1 ATTEN FAULT HAPPENED LP1 LOSW FAILURE LP1 BER ALARM FE1 LOS ALARM FE1 BER ALARM 6.2 Performance statistics The maintenance personnel can use the statistics and data provided by this function to determine the overall on-line operation performance of E1 HDSL W/DTE I/F and quality of signal, such as the HDSL Loop Noise margin. This function provides certain criterion for the overall performance of the telecommunication equipment in the specification of communication, such as BER or statistics of time for bit error (every 15 minutes and every 24 hours). The major targets for observation are HDSL LOOP and FE1 interface. To transmit FE1 signal to remote side, it is required to transform into CAP, which is used by HDSL LOOP, the signal will then converted back to FE1 signal when it reaches the remote side. Unavoidably, there is noise interference in the transmission process. If bits error is detected, the system will request the sender to re-send. If the BER is too high, it means either the circuits are not in good condition or the E1 HDSL W/DTE I/F needs adjustment. The system will record the time that bit errors occur for maintenance personnel s reference. HDTU02/HRM02 6-3

69 Fig 6-3 Performance Statistics Screen This screen has three selections: Network error statistics Records the time that bits error occurs to HDSL LOOP and UAS Network performance statistics Records the signal noise margin for the remote side and local side of HDSL LOOP E1 error statistics Records the time that bits error occurs at FE1 interface Table 6-2 functional selections of performance statistics Statistics of bits error for HDSL LOOP (Network error statistics) Selecting this function, you can read the number of seconds that bits error occurs in the process of transmission by HDSL LOOP. Generally, E1 HDSL W/DTE I/F has very low BER. If your observation shows a different result with high value, you should modify system configuration, or check whether the circuits are normal. There are two resulting screens. You can move the cursor to the functional key Next and Previous on the screen then press Enter key to enter next page or previous page. HDTU02/HRM02 6-4

70 Fig 6-4 Network error statistics For the clear expression of the performance of the E1 HDSL W/DTE I/F system, the specification defines 6 parameters for the observation of communication performance of HDSL LOOP. ES (Error Seconds) refers to the specific second that bits error occurs in the transmission process. If the BER is larger than 30% in a second of transmission process, such second is defined as SES (Severely Error Second), meaning the situation is serious and quality of communication will be affected. UAS refers to invalid number of seconds for communication. The 6 statistics are as following: The times that bits error occurred in the past and present 15-minute cycle (ES-CRC unit is second) The times that severe bits error occurred in past and present 15-minute cycle (SES-CRC unit is second) The times that UAS occurred in past and present 15-minute cycle (UAS unit is second) The times that bits error occurred in past and present 24-hour cycle (ES-CRC unit is second) The times that severe bits error occurred in past and present 24-hour cycle (SES-CRC unit is second) The times that UAS occurred in past and present 24-hour cycle (UAS unit is second) This statistics report helps you to understand the performance of E1 HDSL W/DTE I/F. If the value is higher than your setting, the system will display Alarm (warning) message. This function is provided for observation in the COT side and allows unilateral monitor. HDTU02/HRM02 6-5

71 6.2.2 Performance statistics for HDSL LOOP (Network performance statistics) To allow users to understand the weighting of current signals and noise, the system provides the values of signal noise margin for observation of entire network s efficiency. The unit is db. Fig 6-5 Network performance statistics This range of this data is in between 0 ~ 35 db. When the signal of E1 is transformed into the HDSL CAP format for transmission, a certain degree of intensity is required to transmit the signal to remote side. Comparing the data contained in the fields of the screen with signal noise margin threshold, if it is lower than setting, the warning message will be generated. If the above data is too low, it means that the HDSL LOOP anti-interference capability is too low. If the noise intensity increases a little, the bits error will occur. HDTU02/HRM02 6-6

72 6.2.3 E1 Error Statistics Compared with the observation of HDSL LOOP, the specification also defines the communication efficiency for E-1 interface. There are also 6 parameters for observation: The times that bits error occurred in the past and present 15-minute cycle (ES-CRC unit is second) The times that severe bits error occurred in past and present 15-minute cycle (SES-CRC unit is second) The times that UAS occurred in past and present 15-minute cycle (UAS unit is second) The times that bits error occurred in past and present 24-hour cycle (ES-CRC unit is second) The times that severe bits error occurred in past and present 24-hour cycle (SES-CRC unit is second) The times that UAS occurred in past and present 24-hour cycle (UAS unit is second) Fig 6-6 E-1 Error statistics Screen The above screen is used to monitor the accumulated error data, after the FE1 interface received signal. 6.3 Display status of front panel LED (Display LED) This function allows the system maintenance personnel to use VT100 terminal program to view the LED status of local end and remote end via CID interface. ON means that LED is turned on. OFF means that it is turned off. HDTU02/HRM02 6-7

73 6-7 displays the status of both ends of LED of HDSL W/DTE I/F If the system is not connected normally, the status of remote side will not be available, therefore the status shown here is not correct. 6.4 Display the identity of system (Display Identity) This function provides the specifications and versions of important hardware and software in the E1 HDSL W/DTE I/F system. It displays the location used by the system and system s se rial number, and program version. Fig 6-8 Display Identity HDTU02/HRM02 6-8

74 Chapter 7. System testing If the system is not functioning well or malfunction occurs, you need to test the system using the system s test function. Basically, the system s test functions are designed for loop back test and main device test. Fig 7-1 Test function selection screen 7.1 Loopback tests This function comprises primarily to carry out various loop back tests. The test concept is to identify where the problem exists first. Then we can test whether local side and remote side are normal by LOOP TEST. Through these tests, you can determine if the circuit is normal. Then you test whether the major components inside the system are working normally. Narrow down the range for inspection. Fig 7-2 Loopback Test HDTU02/HRM02 7-1

75 When you enter the display, you can use the up and down keys to move the highlight bar to the specified field. Then you press Space bar key to start executing the value shown in the specified field. On commences test. The length of testing time is defined under the Test Time of the System command. The test will stop automatically when the time is up. HDTU02/HRM02 provides the following 4 types of loop back tests: FE1 Local Line Loop back (LCD abbreviation FE1LB) DTE Local Line Loop back (LCD abbreviation DTELB) Local Line Loop back (Function is the same as front panel push button LPBK(LOC)) (LCD abbreviation LLB) Remote Line Loop back (Function is the same as front panel push button LPBK(RMT) ) (LCD abbreviation RLB) And two types of V.54 test code loop back test: V.54 FE1 Remote channel Loop back ( LCD abbreviation V.54FE1) V.54 DTE Remote channel Loop back ( LCD abbreviation V.54DTE) The test routes for these six loop back tests are described in Chapter 2 and Chapter 3, section 3.8. Please refer to these sections. 7.2 Devise tests This command allows system maintenance personnel to observe whether the major components of E1 HDSL W/DTE I/F system are normal. There are 4 major components can be tested: Fig 7-3 Device Test HDTU02/HRM02 7-2

76 IMF: HDSL Framer RAM: memory used in the system 8370D&I: E1 Framer ( Drop & Insert Interface) XCVR: HDSL Loop Transceiver After the test is over, the results will appear on the display. 7.3 Terminate all tests (abort all test) Terminate all tests to allow the operator to continue on other jobs. When the system is under test, it can not execute any other works. If you desire to interrupt the test in progress, this function will stop the test immediately. Then the system will resume to operation status. Fig 7-4 Terminates all tests HDTU02/HRM02 7-3