Nortel North American DMS-100 Instruction Manual page 565

1-544 Trouble locating and clearing procedures (continued)
TOPS MPX Operator complaint audio/headset malfunction
8
9
297-8021-544 Standard 14.02 May 2001
options
equals "e" or "I" or "e I"
e = extended error descriptions if a failure occurs during a test.
Note: Select the e (extended option) or do not select an option to check
out the headset detection circuitry on the audio card. Select an option also
to check out the circuitry on the audio path to and from the headset jacks.
This action checks for faults in the headset wiring and headset jacks.
When you use the headsets with a volume adjustment, set the level to the
mid-range. You must use the headset hardware option for each new
installation.
l = for loop continuous and stop on first failure.
Note: Select the l (loop continuous option) to check out the headset
detection circuitry on the audio card. This action does not check faults in
the headset wiring from the TOPS MPX to the headsets.
System prompts removal of headsets from both jacks.
Remove headsets from both jacks
and press the DOS ENTER key.
System queries if composite clock is attached:
Answer yes if the digital audio cable is attached and the composite clock in
the time source generator is operational.
If you answer yes, the system asks you during testing to insert and remove
headsets to/from the headset jacks. This action tests the headset detection
circuitry on the audio card. This action also tests the wiring from the TOPS
MPX to the headsets. Type
>Y
and press the DOS ENTER key.
or
Answer no if the digital audio cable is NOT attached or the composite clock in
the time source generator is NOT operational.
If you answer no, the diagnostics use the onboard loopback relays to check
the headset detection circuitry. Type
>N
and press the DOS ENTER key.
After you answer Y or N, the screen prompts as follows:
"Do you want to use your headset hardware to test? [Y/N]"
Answer prompts until all tests are complete.
(continued)