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Black Box BRTS-100 manual

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  • Page 1

    CUSTOMER SUPPORT INFORMATION Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500 ) FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mailing address: Black Box Corporation , 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com OCTOBER 1[...]

  • Page 2

    1 FCC ST A TEMENT FEDERAL COMMUNICA TIONS COMMISSION AND INDUSTR Y CANADA RADIO FREQUENCY INTERFERENCE ST A TEMENTS This equipment generates, uses, and can radiate radio-frequency energy, and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication. It ha[...]

  • Page 3

    2 BR TS-100 ISDN TEST SET NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY ST A TEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura. 3. Todas las adver[...]

  • Page 4

    3 NOM ST A TEMENT 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde s[...]

  • Page 5

    4 BR TS-100 ISDN TEST SET TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.[...]

  • Page 6

    5 CONTENTS Contents Chapter Page 1. Specifications .....................................................................................................2 2. Introduction .......................................................................................................3 2.1 Overview ..............................................................[...]

  • Page 7

    6 BR TS-100 ISDN TEST SET 1. Specifications Input/Output — (2) modular 8-pin jacks (included) ISDN Interface — S/T Line Type — ISDN BRI Nominal Data Rate — 192 kbps Power — 9-VDC battery Size — 7.3"H x 3.3"W x 1.1"D (18.5 x 8.3 x 2.8 cm) Weight — 11 oz. (311.8 g)[...]

  • Page 8

    7 CHAPTER 2: Introduction 2. Introduction 2.1 Overview The BRTS-100 ISDN Test Set is a portable, hand-held, communication-line tester that helps you troubleshoot and verify ISDN S/T interface lines (see Figure 2-1). The Test Set supports a variety of comprehensive tests designed to help telephone and ISDN craft technicians isolate line problems. 2.[...]

  • Page 9

    8 BR TS-100 ISDN TEST SET Figure 2-1. The BRTS-100 ISDN T est Set. 2.3 Features This compact, rugged ISDN S/T interface line test set provides many essential diagnostic functions. It’s easy to use, too, requiring very little knowledge about complex ISDN protocols. The Test Set: • Verifies physical layer (Layer 1) parameters. • Checks for D Ch[...]

  • Page 10

    9 CHAPTER 3: Operation 3. Operation 3.1 Overview You can operate the BRTS-100 ISDN Test Set in a variety of modes. Select them by turning the selector dial on the left of the unit (see Figure 3-1). The indicator lights (LEDs) on top of the unit indicate test results. The various test modes and indicator lights are explained in more detail below. 3.[...]

  • Page 11

    10 BR TS-100 ISDN TEST SET Figure 3-1. BRTS-100 ISDN T est Set controls and indicators. P A S S F A I L TEST ST A TUS P H A N T O M P IN S 7 - 8 A U X POWER L IN E T E S T RECEIVE INITIA TE LINE SPEAKER TERMINA TE 100 OHM POWER OFF ON ON OFF REV NORM T R A C E T O N E LEVEL -6dB TRANSMIT “D” ACTIVITY IMPEDANCE CONTINUITY GRN “1” RED “0”[...]

  • Page 12

    11 CHAPTER 3: Operation Figure 3-2. Connecting the T est Set for point-to-point or passive-bus configurations. 18 18 A B POINT -T O-POINT BRTS-100 ISDN TEST UNIT TO NT1 18 18 A B TERMINAL TO NT1 P ASSIVE BUS BRTS-100 ISDN TEST UNIT[...]

  • Page 13

    12 BR TS-100 ISDN TEST SET To connect the Test Set in a point-to-point configuration, simply connect the 8-pin plug to either the A or B port located on top of the unit. To connect the Test Set in a passive bus configuration, connect the line from the NT1 to either the A or B port, and connect the termi-nal to the other port. The ports are parallel[...]

  • Page 14

    13 CHAPTER 3: Operation NOTE: In reverse mode, the light indicators are opposite. AUXILIARY POWER LIGHT — Indicates the presence and polarity of auxiliary power. Green light — Auxiliary power present, normal polarity. Red light — Auxiliary power present, reverse polarity. No light — No auxiliary power present. TEST STATUS (PASS/FAIL) LIGHTS[...]

  • Page 15

    14 BR TS-100 ISDN TEST SET 4. T est Procedures 4.1 Overview This chapter gives you several suggested test procedures. However, it is by no means the only way to use the Test Set to isolate trouble or to verify lines. NOTE: The following procedures assume certain conditions exist (that procedures are followed in the correct order.) These conditions [...]

  • Page 16

    15 CHAPTER 4: T est Procedures Figure 4-2. T est Configuration 2. Test Configuration 2 — Passive Bus (Figure 4-2) To put the terminal in the Passive Bus Test Configuration: 1. Disconnect the terminal. NOTE: With a passive bus, the S/T interface may disrupt the operation of the other devices on the bus. 2. Connect the S/T jack to Port B of the Tes[...]

  • Page 17

    16 BR TS-100 ISDN TEST SET 4.2 Comprehensive T roubleshooting Procedure This troubleshooting guide is for the user who is either installing a new line and wants to verify the S/T interface, or has a problem with an in-service ISDN terminal. It is a comprehensive procedure which uses virtually all of the Test Set’s testing capabilities and feature[...]

  • Page 18

    17 CHAPTER 4: T est Procedures 12. Put the circuit into its normal operating configuration. (Connect all terminals to the S/T interface.) Figure 4-4. Comprehensive tr oubleshooting flow char t (1 of 2). A ST ART PUT CIRCUIT IN POINT TO POINT CONFIGURA TION (CONFIG. 1) CHECK POWER LINE TEST INITIA TE TEST RESUL T? CHECK LOOP DONE DOES RED LIGHT FLAS[...]

  • Page 19

    18 BR TS-100 ISDN TEST SET 13. a. If the terminal works, there’s no need to proceed any further. b. If the terminal does not work, proceed to step 14. 14. Perform the PAIR REVERSAL test procedure (see page 22). 15. Put the circuit into its normal operating configuration. (Connect all terminals to the S/T interface.) 16. a. If the terminal works, [...]

  • Page 20

    19 CHAPTER 4: T est Procedures 4.3 Check Power Some (not all) ISDN terminals require power from the S/T interface. This procedure verifies that power is received properly at the S/T interface. See Figure 4-5 for an outline of the functions performed in this test. 1. Put the circuit in Test Configuration 1. 2. Make sure the Test Set is in NORMal mod[...]

  • Page 21

    20 BR TS-100 ISDN TEST SET Figure 4-5. Check power flow chart. 4.4 Check Loop This procedure checks for physical impairments in the S/T interface. See Figure 4-6 for an outline of the functions performed during this test. Before implementing this procedure, you must meet the following prerequisites: • The terminal should be receiving proper power[...]

  • Page 22

    21 CHAPTER 4: T est Procedures With the Check Loop procedure, first check to see if the transmit pairs (pins 3 and 6) and the receive pairs (pins 4 and 5) are reversed. 1. Put the Test Set in REVerse mode; LINE button should be in. 2. Put circuit in the Point-to-Point NT1 Test Configuration (Test Configuration 1). 3. Put the Test Set in the LINE TE[...]

  • Page 23

    22 BR TS-100 ISDN TEST SET Figure 4-6. Check loop flow chart (1 of 3) TX & RX P AIRS ARE TRANSPOSED PUT CIRCUIT IN POINT TO POINT CONFIGURA TION (CONFIG. 1) A CHECK LOOP LINE, LINE TEST INITIA TE TEST ST A TUS? CHECK IF TX & RX P AIRS ARE TRANSPOSED DONE GRN RED SWITCH TO REVERSE, INITIA TE LINE TEST LINE, RECEIVE SWITCH TO NORMAL CHECK LOO[...]

  • Page 24

    23 CHAPTER 4: T est Procedures Figure 4-6. Check loop flow chart (2 of 3). SIGNAL LEVEL T OO LOW SWITCH TO REVERSE, DO CONTINUITY TEST A LEVEL TEST ST A TUS? GRN RED PUT BACK IN NORMAL MODE, PUT IN LEVEL TEST MODE TEST ST A TUS? PROBLEM WITH TX P AIR LINE CONTINUITY TEST ST A TUS? NT1 OR SWITCH NOT WORKING OPEN IN RX P AIR CONTINUITY TEST ST A TUS?[...]

  • Page 25

    24 BR TS-100 ISDN TEST SET Figure 4-6. Check loop flow chart (3 of 3). CHECK FOR SHORT IN TRANSMIT P AIR NT1 NOT TERMINA TED OR SHORT ON TX P AIR B TEST ST A TUS? RED PUT BACK IN NORMAL MODE, PUT IN IMPEDANCE TEST MODE LINE IMPEDANCE PROBLEM WITH NT1 GRN[...]

  • Page 26

    25 CHAPTER 4: T est Procedures 10. Put the Test Set in the CONTINUITY Test Mode. 11. a. If the Green Test Status light goes on, there is a physical connection between the terminal and the NT1. b. If the Red Test Status light goes on, there is no continuity on the receive pair between the terminal and the NT1. You should check the loop for opens. Th[...]

  • Page 27

    26 BR TS-100 ISDN TEST SET 4.5 Passive Bus—Check T erminations When you’re using a passive-bus configuration, it’s imperative that the last device on the bus be terminated at 100 ohms. The other devices on the bus must be left unterminated. Termination should be an option on each ISDN terminal. Refer to your terminal’s user manual to determ[...]

  • Page 28

    27 CHAPTER 4: T est Procedures 1. Determine which devices are the first and last devices on the bus. The first device is the one closest to the NT1. The last device is the one furthest from the NT1. See Figure 4-8 for an example of proper device termination. 2. Go to the first device on the bus. 3. Put the Test Set in TERMINATED and NORMAL mode. 4.[...]

  • Page 29

    28 BR TS-100 ISDN TEST SET Figure 4-8. Pr oper device ter minations diagram. NOT TERMINA TED TERMINAL NOT TERMINA TED TERMINAL NOT TERMINA TED TERMINAL NOT TERMINA TED TERMINAL SHOULD BE TERMINA TED A T 100 OHMS TERMINAL NOT TERMINA TED TERMINAL NOT TERMINA TED TERMINAL NOT TERMINA TED TERMINAL LAST DEVICE FIRST DEVICE NT1[...]

  • Page 30

    29 CHAPTER 4: T est Procedures 4.6 Pair Reversal When you use the passive-bus configuration, it’s imperative that all the transmit pairs (from terminal) be wired the same. That is to say, pins 3 and 6 from each terminal on the bus must be wired to pins 3 and 6 of the NT1 respectively. On a point-to-point configuration, the circuit will operate pr[...]

  • Page 31

    30 BR TS-100 ISDN TEST SET b. If the Red Test Status light goes on, the terminals’ wires are crossed— pin 3 of terminal is electrically connected to pin 6 of the other terminal. At this point, you should check the wiring of both terminal A and terminal B. 10. Repeat steps five through eight until all ports on the bus have been checked. Figure 4[...]

  • Page 32

    31 CHAPTER 4: T est Procedures Figure 4-9. Pair reversal flow chart (2 of 2). WIRING THE SAME ON PORT UNDER TEST AND PORT BRTS-100 (A) IS ON GO TO NEXT OUTLET ON BUS CHECK WIRING, PINS 3 & 6 TEST ST A TUS? ALL P AIR REVERSALS IDENTIFIED GRN RED UNPLUG 2nd BRTS-100 (B) A PUT 2nd BRTS-100 (B) ON BUS, TERMINA TED NEED TO CHECK ALL PORTS ON THE BUS[...]

  • Page 33

    32 BR TS-100 ISDN TEST SET Figure 4-10. Pair reversal diagram. NT1 P ASSIVE BUS TERMINAL “A” BRTS-100 UNIT TERMINAL “B” BRTS-100 UNIT MOVE BRTS-100 “B” TO EVER Y PORT[...]

  • Page 34

    33 CHAPTER 4: T est Procedures 4.7 Monitor Use this test when you’ve determined there’s nothing physically wrong with the circuit. The MONITOR procedure checks for any D channel activity. See the Monitor Flow Chart in Figure 4-11 for an outline of the functions performed during this test. Before using this procedure, the following prerequisites[...]

  • Page 35

    34 BR TS-100 ISDN TEST SET Figure 4-11. Monitor flow chart. NO CHECKING FOR D CHANNEL ACTIVITY TR Y TO INITIA TE A CALL WITH TERMINAL “D” ACTIVITY INITIA TE PUT CIRCUIT IN P ASSIVE BUS CONFIGURA TION (CONFIGURA TION 2) MONITOR RED LIGHT FLASH? CHECK TERMINAL TERMINAL IS NOT SENDING ANYTHING CHECK SWITCH P ARAMETERS TERMINAL IS PUTTING OUT D CHA[...]

  • Page 36

    35 CHAPTER 5: T echnical Reference 5. T echnical Reference 5.1 Power-Source Indicators The Phantom Feed light indicates the presence and polarity of battery power. In NORMal mode, the Test Set verifies that the terminal’s transmit pairs are positive and its receive pairs are negative. In REVerse mode, the Test Set verifies that the opposite (tran[...]

  • Page 37

    36 BR TS-100 ISDN TEST SET 5.2 Activation/Deactivation Modes The following information provides the steps that lead to an Active Link state and subsequent Activation/Deactivation modes (Figure 5-2) between the Test Set (TE) and an NT device. The Test Set uses this Activation/Deactivation procedure in Line Test, Transmit, and D Activity modes. See F[...]

  • Page 38

    37 CHAPTER 5: T echnical Reference Figure 5-3. Info frames. Line T est/T ransmit (See Figure 5-4) Line Test and Transmit are exactly the same test. The test is conducted as follows. 1. Upon pressing the INITIATE button, the Test Set tries to establish an ACTIVE link with the NT1. 2. If the ACTIVE state is reached, the Test Set sends an alternating [...]

  • Page 39

    38 BR TS-100 ISDN TEST SET Figure 5-4. T ransmit and line test. D Activity (See Figure 5-5) The D Activity test is designed to run when the Test Set is bridged onto the S/T interface with an ISDN terminal. D Activity will monitor the Echo bits for any D channel data transmitted by the terminal. The D Activity test is conducted as follows: 1. Upon p[...]

  • Page 40

    39 CHAPTER 5: T echnical Reference Figure 5-6. CCITT 1.430. 5.3 AC Impedance As shown in Figure 5-6, CCITT recommends that the AC impedance at 20 to 30 KHz should be greater than 2.5K ohms. To detect this, the Test Set puts an R-sense resistor in series with the device under test (Figure 5-7). A 21- KHz sinusoidal voltage, approximately 1V peak-to-[...]

  • Page 41

    40 BR TS-100 ISDN TEST SET Figure 5-7. AC impedance. Figure 5-8. DC continuity . 100 Ω 6 3 9V BA TTERY LOOP RESIST ANCE 0 - APPROX. 5K Ω MAX. AMOUNT 5mA VDD LOOP DETECT BRTS-100 DEVICE UNDER TEST T A/NT 100 Ω 3 6 SW1 ISPC I.C. R-SENSE 100 Ω PRE AMP FIL TER HIGH DETECT APPROX. 150 OHMS WINDOW COMP ARA TOR SAMPLE & HOLD ST A TUS INDICA T [...]

  • Page 42

    41 CHAPTER 5: T echnical Reference 5.5 Speaker The incoming frequency to the speaker is divided by eight. Since ISDN signals are transmitted at 96 KHz, it has to be reduced in order to be heard over the speaker. When the Test Set is in TRACE TONE mode, the incoming frequency to the speaker is divided by four. So a TRACE tone received by the Test Se[...]

  • Page 43

    42 BR TS-100 ISDN TEST SET Appendix: Maintenance The Test Set requires very little maintenance other than replacing the 9-VDC battery periodically and possibly replacing one or both of the two 8-pin RJ-45- type jack connectors. NOTE: Average battery life is approximately 15 hours of continuous use. Battery Replacement To replace the 9-VDC battery f[...]

  • Page 44

    43 APPENDIX: Maintenance 8-Pin Jack Replacement These connectors need to be replaced only when connections no longer permit a secure-tight connection or when connectors are damaged. In standard use, however, these connectors shouldn’t ever need to be replaced. Follow these steps and see Figure A-2. 1. Remove the five screws from the Test Set back[...]

  • Page 45

    1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 2002. Black Box Corporation. All rights reserved.[...]