Black Box BRTS-100 manual Check Power, Phantom Conclusion Light

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CHAPTER 4: Test 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 mode; LINE button should be out.

3.If the terminal requires Phantom Power (see terminal user guide) use the following table:

Phantom		Conclusion
Light		Conclusion
Light
Green		Power OK
Red		TX & RX pairs reversed

None	No power being received

4.Certain terminals use what is known as PS2 power, which is delivered on pins 7 and 8. If your terminal uses PS2 power check the AUX light and use the following table:

AUX		Conclusion
Light		Conclusion
Light
Green		AUX power OK

Red		Pins 7 & 8 reversed

None		No PS2 power being received

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Contents BRTS-100 Isdn Test Set FCC Statement BRTS-100 Isdn Test SET NOM Statement Trademarks Used in this Manual Contents Specifications Overview How to Use This ManualIntroduction Features 100 EstConnecting the Unit OperationBRTS-100 Isdn Test Set controls and indicators Passive BUS Indicators Powering Up the UnitControls and Indicators Feature Buttons Modes of Operation Test Status PASS/FAIL Lights Reflects test statusTest Procedures Test Configuration 1 Point-to-Point NT1 FigureTest Procedures Comprehensive Troubleshooting Procedure Comprehensive troubleshooting flow chart 1 Comprehensive troubleshooting flow chart 2 Check Power Phantom Conclusion LightCheck Power Check LoopTest Procedures Check loop flow chart 1 Check loop flow chart 2 Check loop flow chart 3 Test Procedures Passive Bus Configuration Check Terminations Passive Bus-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 Power-Source Indicators Technical ReferenceActivation/deactivation procedure Activation/Deactivation ModesLevel Test Line Test/Transmit See FigureReceive Test Transmit and line test AC Impedance DC ContinuityAC impedance Speaker Two Test Set units used for tracingAppendix Maintenance Battery ReplacementPin Jack Replacement Figure A-2. Replacing the 8-Pin Jack ConnectorsCopyright 2002. Black Box Corporation. All rights reserved