Black Box BRTS-100 manual Powering Up the Unit, Controls and Indicators Feature Buttons

Page 13

BRTS-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, so they can be used interchangeably (see Figure 3-2).

3.3 Powering Up the Unit

Power up the Test Set up by depressing the POWER feature button (Figure 3- 1). During operation, the unit automatically performs a battery check. If the battery is low, the unit will beep for approximately 30 minutes.

AUTOMATIC POWER DOWN. If the Test Set does not sense any activity on the line for approximately 10 minutes, it will automatically power down. In a 4-KHz Tone Trace, the Automatic Power Down circuit is disabled.

3.4 Controls and Indicators

Feature Buttons

Feature buttons (Figure 3-1) operate in two modes—in or out. Pushing the button will toggle it to the other mode.

INITIATE — Certain test modes require that you press the INITIATE key. Whenever this is necessary, the INITIATE lamp (yellow LED) will light.

LINE — Lets the user put the loop in NORMal or REVerse modes. In REVerse mode, the Test Set transposes the transmit and receive pairs. When the LINE button is out, the unit is in NORMal mode.

SPEAKER — Turns on the speaker. The speaker lets you hear all the transmissions on the line. Voice transmissions are digitized over the ISDN line and therefore will not be decipherable over the speaker.

TERMINATE — The Test Set normally provides a 100-ohm termination to the line. When pressed (in), the Test Set removes the 100-ohm termination from the line.

POWER — Turns the Test Set on and off.

Indicators

PHANTOM LIGHT — Indicates the presence and polarity of battery power.

Green light — Battery present, normal polarity.

Red light — Battery present, polarity reversed.

No light — No battery present.

12

Image 13
Contents BRTS-100 Isdn Test Set FCC Statement BRTS-100 Isdn Test SET NOM Statement Trademarks Used in this Manual Contents Specifications Introduction How to Use This ManualOverview 100 Est FeaturesOperation Connecting the UnitBRTS-100 Isdn Test Set controls and indicators Passive BUS Controls and Indicators Feature Buttons Powering Up the UnitIndicators Test Status PASS/FAIL Lights Reflects test status Modes of OperationTest Configuration 1 Point-to-Point NT1 Figure Test ProceduresTest Procedures Comprehensive Troubleshooting Procedure Comprehensive troubleshooting flow chart 1 Comprehensive troubleshooting flow chart 2 Phantom Conclusion Light Check PowerCheck Loop Check PowerTest Procedures Check loop flow chart 1 Check loop flow chart 2 Check loop flow chart 3 Test Procedures Passive Bus-Check Terminations Passive Bus Configuration Check TerminationsTest Procedures Proper device terminations diagram Pair Reversal Pair reversal flow chart 1 Pair reversal flow chart 2 10. Pair reversal diagram Monitor 11. Monitor flow chart Technical Reference Power-Source IndicatorsActivation/Deactivation Modes Activation/deactivation procedureReceive Test Line Test/Transmit See FigureLevel Test Transmit and line test DC Continuity AC ImpedanceAC impedance Two Test Set units used for tracing SpeakerBattery Replacement Appendix MaintenanceFigure A-2. Replacing the 8-Pin Jack Connectors Pin Jack ReplacementCopyright 2002. Black Box Corporation. All rights reserved