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CHAPTER 4: Test 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 must be met:
1. All terminals are properly terminated (CHECK TERMINATIONS).
2. No pair reversals exist on a passive bus (PAIR REVERSAL).
3. LINE TEST passes.
4. Terminal does not work properly.
5. Terminal receiving proper power (CHECK POWER).
If all prerequisites exist, proceed with the MONITOR test procedure.
1. Put the Test Set in UNTERMINATED and NORMAL modes.
2. Put circuit in Test Configuration 2.
3. Put the Test Set in the D Activity test mode.
4. Press the INITIATE button.
5. Try to initiate a call with the terminal.
6. a. If the Red Test Status light flashes, the terminal is putting D channel
data on the bus. There’s a problem with the switch. Possibly the switch
parameters are set wrong.
b. If the Red Test Status light does not flash, the terminal is not
outputting any D channel data. Check your terminal.
This section gives you the Test Set’s circuit-level information.