Black Box BRTS-100 D Activity

38

BRTS-100 ISDN TEST SET

Figure 5-4. Transmit 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 pressing the INITIATE button, the Test Set tries to establish an

ACTIVE link with the NT1.

2.If the ACTIVE state is established, the Test Set monitors the D bits and

the red LED lights up whenever terminal activity is detected on the D

channel (D = 0).

Figure 5-5. D Activity.

TERMINAL RX

TX

BRTS-100 RX

TX

D BITS

ECHO BITS

NT1

RX

TX

REC.

TRANS.

BRTS-100

TRANS.

REC.

NT1

ECHO BITS=?

D=01010101...

D=E, LINE IS GOOD, PASS

D≠E, LINE IS BAD, FAIL

Contents

Main OCTOBER 1994 TS675A BRTS-100 ISDN Test Set BRTS-100 ISDN Test Set Page NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD NOM STATEMENT Page CONTENTS Contents 1. Specifications CHAPTER 2: Introduction 2. Introduction 2.1 Overview 2.2 How to Use This Manual Figure 2-1. The BRTS-100 ISDN Test Set. 2.3 Features 3. Operation 3.1 Overview 3.2 Connecting the Unit COLOR SIGNAL PIN NUMBER Figure 3-1. BRTS-100 ISDN Test Set controls and indicators. BRTS-100 ISDN Test Set Figure 3-2. Connecting the Test Set for point-to-point or passive-bus configurations. PASSIVE BUS POINT-TO-POINT 3.3 Powering Up the Unit 3.4 Controls and Indicators Feature Buttons Indicators 3.5 Modes of Operation 4. Test Procedures 4.1 Overview Figure 4-1. Test Configuration 1. Figure 4-2. Test Configuration 2. Figure 4-3. Test Configuration 3. 4.2 Comprehensive Troubleshooting Procedure 17 Figure 4-4. Comprehensive troubleshooting flow chart (1 of 2). Comprehensive Troubleshooting Flow Chart Figure 4-4. Comprehensive troubleshooting flow chart (2 of 2). CHAPTER 4: Test Procedures 4.3 Check Power 20 Figure 4-5. Check power flow chart. 4.4 Check Loop CHECK POWER Page Figure 4-6. Check loop flow chart (1 of 3) 22 CHECK LOOP Figure 4-6. Check loop flow chart (2 of 3). B Figure 4-6. Check loop flow chart (3 of 3). B Page 26 4.5 Passive BusCheck Terminations Figure 4-7. Passive bus flow chart. PASSIVE BUS CONFIGURATION CHECK TERMINATIONS BRTS-100 should be in NORMAL mode Passive Bus Configuration Check Terminations Page Figure 4-8. Proper device terminations diagram. CHAPTER 4: Test Procedures 4.6 Pair Reversal Figure 4-9. Pair reversal flow chart (1 of 2). Figure 4-9. Pair reversal flow chart (2 of 2). Figure 4-10. Pair reversal diagram. CHAPTER 4: Test Procedures 4.7 Monitor 34 Figure 4-11. Monitor flow chart. Monitor Assumes CHAPTER 5: Technical Reference 5. Technical Reference Figure 5-1. Power source indicators. 5.1 Power-Source Indicators 5.2 Activation/Deactivation Modes Figure 5-2. Activation/deactivation procedure. CHAPTER 5: Technical Reference Figure 5-3. Info frames. Line Test/Transmit Receive Test Level Test D Activity Figure 5-5. D Activity. CHAPTER 5: Technical Reference Figure 5-6. CCITT 1.430. 5.3 AC Impedance 5.4 DC Continuity Figure 5-7. AC impedance. +- Figure 5-8. DC continuity. CHAPTER 5: Technical Reference 5.5 Speaker Figure 5-9. Two Test Set units used for tracing. Appendix: Maintenance Battery Replacement Figure A-1. Battery replacement diagram. APPENDIX: Maintenance 8-Pin Jack Replacement Figure A-2. Replacing the 8-Pin Jack Connector(s).