Maintenance-Object Repair Procedures
555-233-143
8-86 Issue 1 May 2002
Battery Feed Test (or Port Diagnostic Test) (#35)
The battery feed chip provides power to the telephone equipment, signaling,
rotary dial pulsing, transmission, and balance. This test checks the signaling and
switchhook capabilities of the battery feed chip by terminating the port, applying
battery, and trying to detect a current.
Any FAIL This test can fail due to either on- or off-board problems. Off-board problems of
concern include EXP-PN and EXP-INTF faults, TDM-BUS faults, and faults
associated with the Tone Detectors/Tone Generators. Clear every off-board
problem before replacing the board. Keep in mind that a TDM-BUS problem is
usually the result of a faulty board connected to the backplane or bent pins on
the backplane.
1. Resolve EXP-PN and EXP-INTF errors.
2. Resolve TDM-BUS errors.
3. Resolve TONE-BD or TONE-PT errors.
4. Test the board when the faults from steps 1, 2, and 3 are cleared. Replace
the board only if the test fails.
PASS The port is correctly using its allocated time slots. User-reported troubles on
this port should be investigated by using other port tests, by examining station
wiring, by examining the station, and by ensuring that the terminal is correctly
translated as off-premises or on-premises.
NOTE:
This test always passes for circuit packs TN712 prior to Vintage 14 and
TN742 prior to Vintage 6.
0NO
BOARD
The test could not relate the internal ID to the port (no board). This could be
due to incorrect translations, no board is inserted, an incorrect board is
inserted, or an insane board is inserted.
1. Verify that the board’s translations are correct. Use the list config
command, and resolve any problems that are found.
2. If the board was found to be correctly inserted in step 1, issue the busyout
board command.
3. Issue the reset board command.
4. Issue the release busy board command.
5. Issue the test board long command.
This should re-establish the linkage between the internal ID and the port. If
not, dispatch to verify that a valid board is inserted.
Table 8-34. Test #6 NPE Crosstalk Test — Continued
Error
Code
Tes t
Result Description / Recommendation
Continued on next page
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