ITA-703. G.703 Rate and Interface Converter Installation and Operation Manual. Notice

Transcription

1 ITA-703 G.703 Rate and Interface Converter Installation and Operation Manual Notice This manual contains information that is proprietary to RAD Data Communications. No part of this publication may be reproduced in any form whatsoever without prior written approval by RAD Data Communications. No representation or warranties for fitness for any purpose other than what is specifically mentioned in this manual is made either by RAD Data Communications or its agents. For further information contact RAD Data Communications at the address below or contact your local distributor. RAD Data Communications Headquarters 12 Hanechoshet Street Tel Aviv Israel Tel: Fax: RAD Data Communications US East 900 Corporate Drive Mahwah, NJ USA Tel: (201) Fax: (201) RAD Data Communications US West 3631 South Harbor Boulevard Suite 250 Santa Ana, CA Tel: (714) Fax: (714) RAD Data Communications Publication No /00

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3 Warranty This RAD product is warranted against defects in material and workmanship for a period of one year from date of shipment. During the warranty period, RAD will, at its option, either repair or replace products which prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by RAD. Buyer shall prepay shipping charges to RAD and RAD shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties and taxes for products returned to RAD from another country. Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer, Buyer-supplied firmware or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance. Exclusive Remedies The remedies provided herein are the Buyer s sole and exclusive remedies. RAD shall not be liable for any direct, indirect special, incidental, or consequential damages, whether based on contract, tort, or any legal theory. Safety Warnings The exclamation point within a triangle is intended to warn the operator or service personnel of operation and maintenance factors relating to the product and its operating environment which could pose a safety hazard. Always observe standard safety precautions during installation, operation and maintenance of this product. Only a qualified and authorized service personnel should carry out adjustment, maintenance or repairs to this instrument. No adjustment, maintenance or repairs should be performed by either the operator or the user. Telecommunication Safety The safety status of each of the ports on the ITA-703 is declared according to EN and is detailed in the table below: Ports Safety Status DTE SELV Circuit operating with Safety Extra-Low Voltage G.703 TNV-1 Circuit whose normal operating voltage is within the limits of SELV, on which overvoltages from Telecommunications Networks are possible.

4 Regulatory Information FCC-15 User Information This equipment has been tested and found to comply with the limits of the Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to the radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. Warning per EN This is a Class A product. In a domestic environment, this product may cause radio interference, in which case the user may be required to take adequate measures.

5 Declaration of Conformity Manufacturer s Name: Manufacturer s Address: RAD Data Communications Ltd. 12 Hanechoshet St. Tel Aviv Israel declares that the product: Product Name: ITA-703 Conforms to the following standard(s) or other normative document(s): EMC: EN (1994) Limits and methods of measurement of radio disturbance characteristics of information technology equipment. EN (1992) Electromagnetic compatibility Generic immunity standards for residential, commercial and light industry. Safety: EN (1992/93) Safety of information technology equipment, including electrical business equipment. Supplementary Information: The product herewith complies with the requirements of the EMC Directive 89/336/EEC and the Low Voltage Directive 73/23/EEC. The product was tested in a typical configuration. Tel Aviv, July 2nd, 1998 Haim Karshen VP Quality European Contact: Rad Data Communications GmbH, Berner Strasse 77, Frankfurt am Main, Germany

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7 Contents CHAPTER 1 INTRODUCTION 1.1 Overview Physical Description Functional Description G.703 Interface Rate Adaptor Async/Sync Converter and V.54 Circuits Transmit FIFO RS-232 Interface Technical Specifications G.703 Interface DTE Interface Test Switches / Diagnostics G.703 Timing Elements LED Indicators Physical Power Supply Line Protection Environment CHAPTER 2 INSTALLATION AND SETUP 2.1 Introduction Site Requirements and Prerequisites Package Contents Mechanical Installation Mechanical Assembly Electrical Installation Strap Selection Setting of Internal Jumpers and Switches Connecting the DTE Interface Connecting the G.703 Interface Power Connection CHAPTER 3 OPERATION 3.1 General Front Panel Indicators and Switches Operating Instructions Power-On Procedure Activation of Tests Power-Off Procedure Reconfiguring ITA ITA-703 Installation & Operation Manual i

8 Table of Contents CHAPTER 4 TESTS AND DIAGNOSTICS 4.1 General V.54 Loop Tests Local Analog Loopback (LLB) Remote Digital Loopback (RLB) Local Digital Loopback (DIG) ITA-703 Self-Test CHAPTER 5 CARD CAGE VERSION 5.1 ASM-MN-214 Card Cage ITA-703/R Card Version Power Supply AC Supply DC Supply Power Supply with Redundancy Installation APPENDIX A V.24/RS-232 INTERCONNECTION APPENDIX B UNIT CASE ASSEMBLY ii ITA-703 Installation & Operation Manual

9 Table of Contents List of Figures Figure 1-1 Typical ITA-703 Application Figure 1-2 Front View of ITA Figure 1-3 ITA-703 Block Diagram Figure 1-4 ITA-703 Synchronization Option Figure 1-5 Clock Diagram Figure 1-6 Clock Configuration Figure 2-1 ITA-703 Board Layout Figure 2-2 ITA-703 Rear Panel Figure 3-1 ITA-703 Front Panel Figure 4-1 Local ITA-703 in Analog Loopback (LLB) Figure 4-2 Local ITA-703 in Remote Digital Loopback (RLB) Figure 4-3 Local ITA-703 in a Digital Loopback Figure 4-4 ITA-703 Self-Test Figure 5-1 ASM-MN-214 Rear Panel Figure 5-2 ITA-703/R Front Panel Figure 5-3 ASM-MN-214 Front Panel Figure B-1 Installation of a Single Unit... B-2 Figure B-2 Installation of Two Units (a)... B-3 Figure B-3 Installation of Two Units (b)... B-3 List of Tables Table 2-1 ITA-703 Strap Selection Table 2-2 RJ-45S Pin Assignments Table 3-1 ITA-703 Controls and Indicators Table A-1 DTE Interface Signal Assignments... A-1 ITA-703 Installation & Operation Manual iii

10 List of Tables iv ITA-703 Installation & Operation Manual

11 Chapter 1 Introduction 1.1 Overview ITA-703 is a rate and interface converter allowing low-speed V.24 equipment to be connected to a G.703 codirectional (64 kbps) interface. This conversion enables connection of low-speed data channels to the PCM network. The rate conversion is performed according to ITU I.463 (V.110) and I.460 standards. This rate conversion also enables access to ISDN terminal adaptors through the telecommunication network. Figure 1-1 shows a typical application of ITA-703. Async 19.2 kbps ASCII Terminal ITA-703 G kbps PCM Network G kbps Figure 1-1 Typical ITA-703 Application ITA-703 VAX ITA-703 operates synchronously or asynchronously, converting V.24 rates up to 19.2 kbps. For async rates of 600 bps and higher, the async-to-sync conversion is compatible with ITU V.14. For async rates lower than 600 bps, ITA-703 operates in synchronous mode at 19.2 kbps and multi-samples the data. Operating full duplex at a transmission rate of 64 kbps, ITA-703 has a range of up to 800m (1/2 mile) from the G.703 equipment. The high-speed transmit timing source is strap-selectable for either recovered clock from the G.703 interface, external timing from the V.24 interface, or internal timing. ITA-703 features V.54 diagnostic capabilities for performing local loopbacks (analog and digital) and remote digital loopback. When in the digital loopback mode, the operator at either end of the line may test both units and the line. The loopbacks are controlled either by front panel push buttons or by pins 18 and 21 of the V.24/RS-232 interface. All V.24 configuration parameters such as bit rate, bit length, and sync/async can be selected at each ITA-703 unit. Alternatively, parameters can be selected at a master ITA-703, and downline loaded from the master to a slave ITA :36 Overview 1-1

12 Chapter 1 - Introduction ITA-703 Installation & Operation Manual The control signals RTS and DTR are passed through end-to-end to DCD or DSR, respectively, in compliance with ITU V.110. DSR can be optionally set separately to be continuously ON. ITA-703 is coupled to the G wire interface line through isolation transformers which, in conjunction with other circuitry, protect against AC or DC overvoltages. The protection circuitry enables operation even when DC is connected to the line. ITA-703 is available in two versions: ITA-703/SA (standalone desktop unit) and ITA-703/R (rack-mount card for the ASM-MN-214 rack). For description of the rack-mount version, see Chapter Physical Description The ITA-703 standalone device is shown in Figure 1-2. Its front panel contains control switches and LED indicators for controlling and monitoring its operation. For detailed description of the front panel, see Chapter 3. The rear panel contains power and interface connectors. For detailed description, see Chapter 2. A special hardware kit, RM-9, for mounting standalone units into a 19" rack can be ordered separately. This hardware enables installation of either one or two units side by side (see Appendix B). Figure 1-2 Front View of ITA Physical Description :36

13 ITA-703 Installation & Operation Manual Chapter 1 - Introduction 1.3 Functional Description This section contains functional description of the ITA-703 circuit blocks. The ITA-703 block diagram in shown in Figure 1-3 below. INT TD E.CK TRANS- MIT FIFO RD (LOW SPEED) TC & RC TD HIGH SPEED ASYNC/SYNC CONVERTER AND V.54 CIRCUITS TD LOW -SPEED CLOCK RD RATE ADAPTER RXD TXC TXC 64 khz RECEIVE FIFO RXD TXC EXTERNAL G.703 INTERFACE INTERNAL RECEIVE TEST V.1 10 SYNC LOSS G.703 SYNC LOSS Figure 1-3 ITA-703 Block Diagram G.703 Interface The G.703 interface on the transmit side converts the analog transmit signal to a three-level signal, and inserts a bipolar violation every block of eight bits (according to the G.703 standard). On the receive side, the interface provides the digital signal (from the received analog signal) synchronized with the violation signal. If no violation signal is received, the G.703 SYNC LOSS indicator lights up. The G.703 interface also provides one of three rate adaptor timing sources: Internal (a free-running crystal oscillator) Receive (synchronized with the received G.703 signal) External (synchronized with the low speed clock provided by the DTE on Pin 24) Note The system needs one master clock. If one unit is set to Internal/External clock, the other unit must be set to Receive clock (or RCVB if needed). RCVB is a special option provided for cases in which the timing source is the Receive clock, but the incoming low speed data is synchronized according to the External clock. In such cases, external synchronization between the G.703 network and the local DTE must be provided, as shown in Figure :36 Functional Description 1-3

14 Chapter 1 - Introduction ITA-703 Installation & Operation Manual Figure 1-4 ITA-703 Synchronization Option Rate Adaptor Async/Sync Converter and V.54 Circuits Transmit FIFO RS-232 Interface Notes The rate adaptor implements the ITU V.110 (I.463) standard. The RTS and DTR control signals and incoming low speed data are transmitted on the line (at 64 khz) in frames. The receive side of the block checks the incoming frames and sends the relevant data to the low speed channel. If the unit loses synchronization on the received frames, the V110 SYNC LOSS indicator lights up. The RTS and DTR signals are passed through as DCD and DSR. The rate adaptor also provides the low speed transmit and receive clock. If the DTE is an async type, an async/sync conversion is provided (as described in the V.22 standard). The V.54 circuits send and receive the pattern in order to provide the remote digital loop in the local or the remote unit. The transmit FIFO compensates for phase differences if the unit is synchronized to the external low speed clock provided on Pin 24 (DTE timing). It is also used when ITA-703 is synchronized with the received G.703 signal, as shown in Figure 1-4, and the DTE provides the clock (Transmit Clock set to RCVB - see Table 2.1). In this case the DTE and the digital transmission system must be externally synchronized. The RS-232 interface module provides a standard voltage conversion to V.24/RS-232 levels. 1. In order to enable the DCD and RD signals on the remote unit, the local RTS signal must be in the ON state. 2. If the unit is not synchronized according to V.110 (I.463), the CTS, DSR and DCD pins are in the OFF state. 1-4 Functional Description :36

15 ITA-703 Installation & Operation Manual Chapter 1 - Introduction Figure 1-5 Clock Diagram Figure 1-6 Clock Configuration :36 Functional Description 1-5

16 Chapter 1 - Introduction ITA-703 Installation & Operation Manual 1.4 Technical Specifications G.703 Interface Interface Codirectional 64 kbps Line Connectors Range Impedance Balance Return loss Clock frequency Frequency tracking Pulse amplitude Zero amplitude 4-wire RJ-45S or terminal block Up to 800m (1/2 mile) over 24 AWG 120Ω balanced Better than 45 db (up to 256 khz) Better than 20 db (up to 256 khz) Better than 14 db (up to 384 khz) 64 khz ±500 ppm 1.0V nominal 0V±0.1V max DTE Interface Type RS-232/V.24 Format Sync or async, full duplex Data rates 600, 1200, 2400, 4800, 7200, 9600, 14400, bps Character length in async mode Control signals Connector Selectable 8, 9, 10, 11 (includes Start+Stop+Parity+Character bits) RTS, DTR, DCD, DSR, CTS are passed through according to ITU I.463. DSR may be set to constantly ON (strap-selectable). 25-pin D-type, female Test Switches/ Diagnostics Complies with the V.54 Standard Digital loopback Local (DIG): Activated by a manual switch. Remote (REM): Activated by a manual switch or by the DTE interface signal (pin 21). Analog loopback Local (ANA): Activated by a manual switch or by the DTE 1-6 Technical Specifications :36

17 ITA-703 Installation & Operation Manual Chapter 1 - Introduction G.703 Timing Elements Transmit clock interface signal (pin 18). Derived from 3 alternative sources: - Internal oscillator - External from the DTE (pin 24) low speed clock - Loop clock derived from the receive signal, looped back as a transmit clock Low speed clock The DCE low speed timing signal (pins 15 and 17) is derived from the 64 khz clock. LED Indicators PWR Power RTS TD RD TEST SYNC LOSS Request to Send Transmit Data Receive Data Test G703 - on G.703 interface V110 - on incoming data frame Physical ITA-703 Standalone Unit Height Width Depth Weight 44 mm / 1.7 in 193 mm / 7.6 in 242 mm / 9.5 in 1.4 kg / 3.1 lb. ITA Card Version Dimensions Weight Fit the ASM-MN-214 card cage 360 g / 0.73 lb ASM-MN-214 Card Cage Height Width Depth Weight 178 mm / 7.0 in 480 mm / 19.0 in 216 mm / 8.5 in 4.0 kg / 8.8 lb (without power supplies and modem cards) :36 Technical Specifications 1-7

18 Chapter 1 - Introduction ITA-703 Installation & Operation Manual Power Supply Voltage 115 or 230 VAC ± 10% Frequency Power Fuse 50 or 60 Hz 3W 0.1A slow-blow Line Protection AC/DC overvoltage protection, connected via transformers to transmit and receive telephone lines (or coaxial cable). Environment Temperature 0-50 C / F Humidity 0 to 90%, non-condensing 1-8 Technical Specifications :36

19 Chapter 2 Installation and Setup 2.1 Introduction This chapter provides instructions for mechanical and electrical installation of the ITA-703 standalone model. (For the installation of the ITA-703/R card in the ASM-MN-214 card cage, see Chapter 5). Sections 2.2 and 2.3 describe site preparation and mechanical installation of the unit. Section 2.4 describes electrical installation, including strap selection, setting the internal jumpers and switches, and connection of power and interfaces to the unit. After completing installation, refer to Chapter 3 for operating information and system checkout to ensure proper operation. 2.2 Site Requirements and Prerequisites Install ITA-703 within 1.5m (5 feet) of an easily accessible grounded AC outlet. The outlet should be capable of furnishing the voltage in accordance with the rated voltage of the unit. Allow at least 90 cm (36 in) of frontal clearance for operating and maintenance accessibility. Allow at least 10 cm (4 in) clearance at the rear of the unit for signal lines and interface cables. 2.3 Package Contents The ITA-703 package includes the following items: The ITA-703 unit The ITA-703 Installation and Operation Manual The AC power cord :28 Mechanical Installation 2-1

20 Chapter 2 - Installation ITA-703 Installation & Operation Manual 2.4 Mechanical Installation Mechanical Assembly ITA-703 is a standalone device designed for tabletop or bench installation. It is delivered completely assembled. No provision is made for bolting the unit to the tabletop. For installation of a the unit into a 19 rack, see Appendix B. 2.5 Electrical Installation To complete the installation of ITA-703, you must perform the following (in the given order): Determine the required configuration of ITA-703, according to your application, and set the internal jumpers and switches accordingly. Connect the DTE and line interfaces. Connect power to the unit. Strap Selection Warning Before connecting power to the unit, determine the required configuration of ITA-703 and position the straps accordingly. The PCB strap locations of Figure 2-1 correspond to the numbers in Table 2-1. To avoid accidental electric shock, disconnect the power cord before removing the unit from its casing. Setting of Internal Jumpers and Switches 1. Loosen the two screws located at the lower corners of the rear panel. 2. Slide the unit out of its casing. 3. Adjust the jumpers and switches as required, according to Table Reinstall the unit in the casing and tighten the retaining screws. 2-2 Electrical Installation :28

21 ITA-703 Installation & Operation Manual Chapter 2 - Installation 7 1 DIS SWITCH M S ASYNC SYNC BITS EN S1 S2 S3/S BAUD RATE (kbps) DSR ON REM INT EXT RCV RCVB TC G703 DIS EN PIN 21 PIN Figure 2-1 ITA-703 Board Layout :28 Electrical Installation 2-3

22 Chapter 2 - Installation ITA-703 Installation & Operation Manual Table 2-1 ITA-703 Strap Selection Ident. Number Strap Identity Function Possible Settings Factory Setting 1 BAUD RATE (kbps) Selects the low speed data rate DSR Provides a steady space (ON) independently of the remote DTR or reflects the remote DTR. 3 TC G.703 Selects the transmit clock (64 khz) from either: internal clock (INT), receive clock (RCV), external clock (EXT) or receive clock plus FIFO active for transmit data with DTE timing provided (RCVB). ON REM INT EXT RCV RCVB 4 PIN 21 Enables remote loopback from the DTE EN DIS 5 PIN 18 Enables local loopback from the DTE EN DIS 6 DIP Switches S1 - Selects if the unit works according to its own ( Master ) configuration for baud rate, sync/async and bit lengths or according to the remote unit ( Slave ). S2 - Provides an async/sync conversion S3/S4 - Character length (includes start bits + stop bits+parity) M S ASYNC SYNC SWITCH Enables the activation of front panel push buttons EN DIS 3 ON RCV DIS DIS M ASYNC 11 EN Note If the DTE does not provide the test pins for analog and remote loopback, the combined jumper for pins 18 and pin 21 must always be set to DIS. Connecting the DTE Interface The DTE side (see Figure 2-2) provides interface for input/output data, clock and control signals between ITA-703 and the DTE. The DTE interface has a V.24/RS-232 connector. 2-4 Electrical Installation :28

23 ITA-703 Installation & Operation Manual Chapter 2 - Installation XMT RCV GND DTE Pin1 ~230V/F-0.1A S.B. Figure 2-2 ITA-703 Rear Panel To connect ITA-703 to the DTE, use a standard cable which you can order either from RAD (CBL-HBT/V24) or from another provider. In order to fully comply with ESD requirements, make sure that Pin 1 of the cable is earthed at the far end. Connecting the G.703 Interface The G.703 Interface has either a RJ-45S connector or a terminal block connector (see Figure 2-2). RJ-45S Connector The pin assignments for the RJ-45S connector are as follows: Table 2-2 RJ-45S Pin Assignments Pin Function 2 Shield (Chassis Ground) 3 Receive 4 Transmit 5 Transmit 6 Receive In order to fully comply with ESD requirements, make sure that pin 2 is earthed at the far end. Terminal Block The terminal block provides four connecting points to the transmit and receive twisted pair lines and a fifth one for ground connection. In order to comply with ESD requirements, the terminal block is covered by a metal cover plate, which must not be removed unless you have to connect the terminal block to G.703 equipment :28 Electrical Installation 2-5

24 Chapter 2 - Installation ITA-703 Installation & Operation Manual To connect the G.703 equipment to the terminal block, proceed as follows: Do not touch bare line wires. Warning 1. Unscrew the two screws connecting the cover plate to the unit and remove the cover plate. 2. Connect the transmit pair to the terminals marked XMT (data output of the converter), and the receive pair to the terminals marked RCV (data input to the converter). 3. Connect the GND terminal externally to earth. 4. Reinstall the cover plate in its place. Power Connection AC power is supplied to ITA-703 through a standard 3-prong plug with integral fuse holder (see Figure 2-2). The rated fuse for the unit is 230V / 0.1A slow-blow for 230V and 115V / 0.1A slow-blow for 115V. This unit should always be grounded through the protective earth lead of the power cable. Warning Before connecting power to this unit, verify that the socket outlet is provided with a protective earth contact. If you are using an extension cord (power cable) make sure it is grounded as well. Interrupting the protective (grounding) conductor (inside or outside the unit), or disconnecting the protective earth terminal can make this unit dangerous. The line fuse is located in an integral-type fuse holder on the rear panel (as shown in Figure 2-2). Make sure that only fuses of the required rating, as marked on the rear panel, are used for replacement. Do not use repaired fuses or short-circuit the fuse holder. Always disconnect the mains cable before removing or replacing the fuse. Whenever it is likely that the fuse protection has been damaged, make the unit inoperative and secure it against unintended operation. To connect power to the unit, simply connect its power cord to the power supply socket. 2-6 Electrical Installation :28

25 Chapter 3 Operation 3.1 General This chapter describes the ITA-703 controls and indicators and their functions, and explains the operating procedures. Installation procedures given in Chapter 2 must be completed and checked before attempting to operate ITA Front Panel Indicators and Switches All controls (push-button switches) and LED indicators are located on the ITA-703 front panel (see Figure 1-3). Pressing a push button turns the control ON. Releasing the button turns the control OFF. Tables 3-1 and 3-2 indicate the functions of push buttons and LED indicators, respectively. Item letters and numbers listed in the tables correspond to the identification labels in Figure 3-1. PWR RTS TD RD TST SYNC LOSS G703 V110 DIG ANA REM Figure 3-1 ITA-703 Front Panel :55 Front Panel Indicators and Switches 3-1

26 Chapter 3 - Operation ITA-703 Installation & Operation Manual Table 3-1 ITA-703 Controls and Indicators No Name Type Function 1 PWR LED Indicator (green) 2 RTS LED Indicator (yellow) ON when power is on. ON when the DTE activates Request to Send. 3 TD LED Indicator (yellow) 4 RD LED Indicator (yellow) 5 TST LED Indicator (red) 6 SYNC LOSS G703 7 SYNC LOSS V110 LED Indicator (red) LED Indicator (red) ON when steady space is being transmitted. Flickers when data is transmitted. ON when steady space is being received. Flickers when data is received. Not active on digital loop, while receiving remote loop. ON when the unit is in any of the three loopback modes. OFF for normal operation. ON if violations are not present on receive signal. OFF for normal operation. ON if synchronization is lost on more than three consecutive frames on the incoming G.703 signal. 8 DIG Push button Activates a Local Digital Loopback switch, which causes the local ITA-703 unit to loop line-received data to its transmitter (see Figure 4-3). DSR and RD go low. 9 ANA Push button Activates a Local Analog Loopback (V.54 Loop 2) switch, which causes the local unit to loop its DTE input back to its output (see Figure 4-1). The transmitter continues to send data to the line. This loopback may also be activated from the DTE when pin 18 is set to EN. 10 REM Push button Activates a Remote Digital Loopback (V.54 loop 3) switch, which causes the remote unit to loop received data to its transmitter (see Figure 4-2). DSR and RD in the remote unit go low. This loopback may also be activated from the DTE when pin 21 is set to EN. 3-2 Operating Instructions :55

27 ITA-703 Installation & Operation Manual Chapter 3 - Operation 3.3 Operating Instructions ITA-703 requires no operator intervention once installed (see Chapter 2), except for occasional monitoring of the front panel indicators. Intervention is only required when: ITA-703 has to be adapted to new operational requirements. Diagnostic loops are required. Power-On Procedure ITA-703 is turned on as soon as its power cord is connected to the power mains outlet. The PWR LED lights up, indicating that ITA-703 is on. Verify that the local and remote ITA-703 units are in operation by checking that the front panel LEDs on the local and remote units match the following conditions: PWR RTS TD RD TST SYNC LOSS V100 G703 On On Flashing or Off Flashing or Off Off Off Off Hint: If the indicators do not match the conditions above, verify that none of the front panel test buttons are depressed. Activation of Tests In order to verify that ITA-703 is operating correctly, use the loopback tests as described in Chapter 4. When performing tests, observe the following guidelines and restrictions: Activation of a test loop interrupts normal traffic flow. Only one test can be activated at a time. Power-Off Procedure To turn off the power to ITA-703, simply remove the power cord from the power source :55 Reconfiguring ITA

28 Chapter 3 - Operation ITA-703 Installation & Operation Manual 3.4 Reconfiguring ITA-703 If it becomes necessary to reconfigure ITA-703 for a different type of operation, field straps must be changed to correspond to the new operating mode. For guidance in repositioning the straps and switches, refer to Section 2.5, Electrical Installation, in Chapter 2 and to Table 2-1. Field straps should be changed by an experienced technician. Warning To avoid accidental electric shock, disconnect the ITA-703 power cord and the line wires before removing the unit from its casing. 3-4 Reconfiguring ITA :55

29 Chapter 4 Tests and Diagnostics 4.1 General This chapter contains procedures for performing system diagnostic tests for ITA-703. Use the test procedures provided in this chapter to: Verify normal system operation Isolate faulty equipment or cables Identify other sources of system malfunction. Tests are activated by control push buttons on the ITA-703 front panel and monitored via LED indicators. For description of ITA-703 controls and indicators and their functionality, see Chapter 3. Section 4.2 describes ITU V.54 diagnostic capabilities for performing local analog loopbacks and local and remote digital loopbacks featured by ITA-703. Section 4.3 describes a self-test for checking if the unit itself operates properly. 4.2 V.54 Loop Tests ITA-703 supports several types of loopback tests for evaluating the operation of the data system equipment and its line circuits. Using these loopbacks, you can test communication between the attached equipment, internal circuitry of the local ITA-703 and the remote ITA-703. Loopback tests are best performed in the following order (as presented in this section): Local analog loopback Remote digital loopback Local digital loopback :46 V.54 Loop Tests 4-1

30 Chapter 4 - Tests and Diagnostics ITA-703 Installation & Operation Manual Note Before running the loopback tests: Verify that the DTE is operating properly and can be used for a test. Do not perform tests with faulty equipment. Ensure that all units are powered on and are configured correctly. Local Analog Loopback (LLB) The Local Analog Loopback (LLB) test checks the performance of the local ITA-703, the local DTE, and the connections between them. It is performed separately at the local and the remote site. To perform the test, proceed as follows. Activate the LLB loopback by pressing the ANA button on the ITA-703 front panel. When LLB is initiated, the TST LED will light, indicating that the ITA- 703 transmit output is now operationally connected to its own receiver (see Figure 4-1). ITA-703 continues to send data to the line side. This test can also be activated via pin 18 on the DTE interface. ANA PRESSED DATA CLK TRANSMIT DTE LINE INTERFACE CLK DATA RECEIVE ITA-703 Figure 4-1 Local ITA-703 in Analog Loopback (LLB) It is recommended to repeat the LLB test using external BERT equipment. If the BERT test indicates an error-free data stream, but the test using DTE indicates a fault, verify that the cable between the DTE and ITA-703 is properly connected. If the problem persists, follow the DTE manufacturer s test procedures. To pinpoint a communication line problem, perform the LLB loopback at the opposite end. If both LLB tests are error-free, the fault is in the communication line or in the line interfaces. After completing the test or correcting the fault, restore the ANA button to the OFF position. 4-2 V.54 Loop Tests :46

31 ITA-703 Installation & Operation Manual Chapter 4 - Tests and Diagnostics Remote Digital Loopback (RLB) The Remote Digital Loopback (RLB) test determines the performance of the local and the remote ITA-703 units as well as their connecting lines. The Remote Digital Loopback sets a loop at the remote ITA-703 unit from the terminal coupled to the local unit (see Figure 4-2). REM PRESSED DATA CLK Transmit Receive LOCAL DTE Line Interface Line Interface REMOTE DTE CLK DATA Receive Transmit LOCAL ITA-703 REMOTE ITA-703 Figure 4-2 Local ITA-703 in Remote Digital Loopback (RLB) Local Digital Loopback (DIG) To perform the test, activate the RLB loopback by pressing the REM button on the ITA-703 front panel. Running this test will light the TST LED on the front panel of both the local and remote units. The SYNC LOSS LEDs should not light neither on local nor on the remote unit. This test can also be activated via pin 21 on the DTE interface. If the RLB test indicates a fault, but the LLB test (see above) was successful for both local and remote units, then the line, or line circuits on either side of the line, are not functioning properly. This test is activated by pressing the DIG button. The test consists of looping the received data back to the remote ITA-703, as shown in Figure 4-3. Using this test, the operator at the remote end can determine the performance of the local and remote ITA-703 units, and the communication lines interconnecting them :46 V.54 Loop Tests 4-3

32 Chapter 4 - Tests and Diagnostics ITA-703 Installation & Operation Manual DIG PRESSED Transmit Receive DATA CLK LOCAL DTE Line Interface Line Interface REMOTE DTE Receive Transmit DATA CLK LOCAL ITA-703 REMOTE ITA-703 Figure 4-3 Local ITA-703 in a Digital Loopback 4.3 ITA-703 Self-Test This test (see Figure 4-4) verifies that the converter itself is operating correctly. To perform the test, proceed as follows: 1. Press the ANA button on the ITA-703 front panel and wait for the TST LED to light. 2. Verify that both of the SYNC LOSS LEDs are OFF. If one of them lights up or blinks, then the ITA-703 communication system is faulty. If the test executes correctly, restore the ANA button to its normal position. ANA PRESSED TRANSMITTER Transmit V.110 SYNC LOSS G.703 RECEIVER ITA-703 Receive Figure 4-4 ITA-703 Self-Test 4-4 ITA-703 Self-Test :46

33 Chapter 5 Card Cage Version 5.1 ASM-MN-214 Card Cage The ASM-MN-214 card cage contains one or two power supplies and up to 14 plug-in cards. The card types can be ITA-703/R or other RAD rack version modems/converters any combination of up to 14 plug-in cards. For each of the 14 cards, the rear panel (see Figure 5-1) contains a male connector for the terminal block and a DB-25 connector. A protection cover protects the terminal block connectors. The terminal block (see Figure 5-1) is to be attached to the rear panel terminal block connectors. It contains screws for connecting the transmit and receive pairs and ground, if present. The 25-pin D-type female interface connector provides all interface signals for the digital interfaces. Converters with X.21 or V.35 interface require an external mechanical adapter. Two optional interface attachments, CIA/V.35/1 and CIA/X.21, can be ordered separately from RAD. CIA/X.21 converts two adjacent DB-25 connectors to two X pin connectors. CIA/V.35/1 converts one DB-25 connector to a V pin connector. To convert the DB-25 connector to a V pin connector, an optional RAD adapter cable (CBL 530/449/F) can be ordered separately. The adapter cable and two interface attachments are also shown in Figure :45 ASM-MN-214 Card Cage 5-1

34 Chapter 5 - Card Cage Version ITA-703 Installation & Operation Manual Terminal Block Terminal Block CIA/V.35/1 Protection Cover CIA/X.21 CBL 530/449/F Figure 5-1 ASM-MN-214 Rear Panel 5.2 ITA-703/R Card Version ITA-703/R is a card version of the ITA-703, having the same functionality as the standalone device. LED indicators and test switches of each ITA-703 card are conveniently located on the front panel shown in Figure 5-2, enabling LED indicators to be clearly visible, and test switches to be easily handled. See Chapter 2 for card jumper setting and Chapter 3 for card operation information. 5-2 ITA-703/R Card Version :45

35 ITA-703 Installation & Operation Manual Chapter 5 - Card Cage Version PWR RTS TD RD TST G703 V110 SYNC LOSS DIG ANA REM ITA-703 Figure 5-2 ITA-703/R Front Panel 5.3 Power Supply The ITA-703 card is powered from the ASM-MN-214 power supply via its chassis. Each ITA-703 card has two fuses which protect the entire system against power failure due to a short circuit in one card. The ASM-MN-214 card cage can accept both AC or DC power supplies. LED indicators located on the ASM-MN-214 front panel (see Figure 5-3) show activity when the power supply is connected to the mains plug. The power supply supports the full card cage with any combination of cards :45 Power Supply 5-3

36 Chapter 5 - Card Cage Version ITA-703 Installation & Operation Manual AC Supply The AC power supply of the ASM-MN-214 is 100, 115 or 230 VAC, ±10%, 50 or 60 Hz. DC Supply Power Supply with Redundancy Note The DC power supply is 48 VDC (36 to 72 VDC) or 24 VDC (18 to 32 VDC). It uses a DC/DC converter module to provide the power required for the cards. This special ordering option is equipped with two separate power supplies, operating together and sharing the load of the whole card cage. If either of the power supplies fails, the other one will continue to supply power to the full card cage. Two LED indicators show activity of each power supply. They should both light when mains power is provided. It is possible to combine AC and DC power supplies in the same cage. Figure 5-3 ASM-MN-214 Front Panel 5-4 Power Supply :45

37 ITA-703 Installation & Operation Manual Chapter 5 - Card Cage Version 5.4 Installation To install the ITA-703/R card in the ASM-MN-214 card cage: 1. Install the ASM-MN-214 card cage in the 19" rack. 2. Adjust the jumpers on the card as required (see Table 2-1 and Figure 2-1 in Chapter 2). 3. Insert the ITA-703/R card into one of the ASM-MN-214 slots. Push the bottom of the card into the cage to until it is fully inserted into the edge connector inside the rack. Tighten the screws on the top and on the bottom of each card. 4. Remove the protection cover from the terminal block connectors. 5. Connect the terminal block to the ASM-MN-214 terminal block connector. 6. Connect the line to the terminal block as follows: connect transmit pair to the terminals marked XMT, the receive pair to the terminals marked RCV, and the fifth screw to ground (optional). 7. If required, attach the appropriate CIA (CIA/X.21 or CIA/V.35/1) or V.36 adapter cable to the DB-25 connector on the card cage rear panel. 8. Connect the DTE cable to the DB-25 connector, other side of CIA or adapter cable (depending on your card interface). 9. Connect power to the ASM-MN-214 card cage: To connect AC power, connect the power cable to the mains supply. To connect DC power, refer to DC Power Supply Connection Supplement of the ASM-MN-214 Installation and Operation Manual. Note The ASM-MN-214 card cage has no power switch. Operation starts when the power is applied to the rear panel POWER connector. When applying power, first connect the plug of the power cord to the ASM-MN-214 POWER connector and then to the mains power source (outlet) :45 Installation 5-5

38 Chapter 5 - Card Cage Version ITA-703 Installation & Operation Manual 5-6 Installation :45

39 Appendix A V.24/RS-232 Interconnection Table A-1 DTE Interface Signal Assignments Signal Name V.24 RS-232 Pin Description Protective Ground 101 AA 1 Chassis ground. May be isolated from Signal Ground (refer to GND Strap in Table 2.1). Signal Ground 102 AB 7 Common signal and DC power supply ground. N/A N/A 9 10 Output +5 VDC Output -5 VDC Transmitted Data 103 BA 2 Serial digital data from a terminal or other source. If accompanied by an external data rate clock, data transitions must occur on positive-going transitions of the external transmit output clock. Received Data 104 BB 3 Serial Digital data at the output of the unit receiver. The data transitions occur on the rising edge of the clock. Request to Send 105 CA 4 A positive level to ITA-703 when data transmission is desired. Clear to Send 106 CB 5 A positive level from ITA-703, after receipt of Request to Send and when ITA-703 is ready to transmit Data Set Ready 107 CC 6 A positive level from ITA-703 when the power is on and ITA-703 is not in the DIGITAL LOOP mode or has not received a REMOTE LOOPBACK signal from the remote unit; otherwise, Data Set Ready follows the remote DTR Receive Line Signal Detector (Carrier Detect) External Trans. Serial Clock 109 CF 8 A positive level from ITA-703, except when a loss of the received input signal is detected or when remote RTS is negative. 113 DA 24 A serial data rate clock input from the data source. Positive clock transitions correspond to data transitions :33 A-1

40 Appendix A - V.24/R.232 Interconnection ITA-703 Installation & Operation Manual Table A-1 DTE Interface Signal Assignments (Cont.) Signal Name V.24 RS-232 Pin Description Transmitter Signal Element Timing 114 DB 15 A transmit data rate clock for use by external data source. Positive clock transitions correspond to data transitions. Receiver Signal 115 DD 17 A receive data rate clock output for use by external data sync. Positive clock transitions correspond to data transitions. Test Indicator A control signal output from ITA-703. Positive during any test mode. Loop 3 Test Command Loop 2 Test Command Data Terminal Ready A control signal input; when on, commands ITA-703 into Local Analog Loopback (V.54 Loop 3) A control signal input; when on, commands ITA-703 to send a remote Loopback Command (V.54 Loop 2) to the remote ITA This input signal is passed through to the remote ITA-703 as DSR. A :33

41 Appendix B Unit Case Assembly B.1 Installation of the Unit Case into a 19" Rack General The height of the unit is 1U (1.75"); the width of the unit is slightly less than half the available mounting width. A rack adapter kit, RM-9, is available for installing either a single unit or two units side by side in a 19" rack. Warning Disconnect AC power before performing the procedures below. Installation of a Single Unit Rack adapter components for installing a single unit include one short bracket and one long bracket. Each bracket is fastened to the side walls of the unit by two screws which are inserted into the two front holes on the side wall. Note that the short bracket fastens to the left side of the unit, and the long bracket to the right side of the unit (see Figure B-1). Once the brackets are fastened to the side walls, the unit is ready for installation in the 19" rack. Place the unit in the rack and fasten the brackets to the side rails of the rack using two screws on each side (not included in the kit) :43 Installation of the Unit Case into a 19" Rack B-1

42 Appendix B - Unit Case Assembly ITA-703 Installation & Operation Manual Figure B-1 Installation of a Single Unit Installation of Two Units Rack adapter components for installing two units include two long side rails (one for each unit) which slide one into the other fastening the two units together, and two short side brackets which hold the two units in the 19" rack (see Figure B-2). To install two units follow these instructions: 1. Fasten one long side rail to each unit using the four screws supplied. The side rails must be attached in opposing fashion, the narrow flange of the first rail opposite the wide flange of the second rail. 2. Attach one short bracket opposite the side rail on each unit using the four screws supplied. 3. Slide the side rail of one unit into the side rail of the other unit, fastening the two units together (see Figure B-3). 4. Secure the supplied plastic caps to the ends of the rails to prevent the units from moving and to protect the rail ends. 5. Place the assembled units in the rack and fasten the brackets to the side rails of the rack using four screws on each side (not included in the kit). B-2 Installation of the Unit Case into a 19" Rack :43

43 ITA-703 Installation & Operation Manual Appendix B - Unit Case Assembly Figure B-2 Installation of Two Units (a) Figure B-3 Installation of Two Units (b) :43 Installation of the Unit Case into a 19" Rack B-3

44 Appendix B - Unit Case Assembly ITA-703 Installation & Operation Manual B-4 Installation of the Unit Case into a 19" Rack :43