User manual
DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-636EXP-INTF (Expansion Interface Circuit Pack)
10
3 FAIL The reset over the optical fiber failed.
1. Execute the test board PCSS command on the PPN neighbor
Expansion Interface circuit pack located on the opposite end of the
fiber from this Expansion Interface circuit pack. If Test #238 does not
pass, follow the maintenance procedure associated with this test
result. Then perform the reset again.
2. If the Expansion Interface circuit pack is in the EPN, temporarily
remove the EPN Maintenance circuit pack.
3. Repeat the reset board PCSS command.
4. Reinsert EPN Maintenance circuit pack if it was removed.
5. Follow the procedure described in the "Relationship Between
Expansion Interface and Tone-Clock Circuit Packs" section if the
symptoms match those described there.
6. Check the Hardware Error Log for the EPN Tone-Clock errors that were
resolved about when the EPN went down. These EPN Tone-Clock
errors may have been resolved BECAUSE the EPN went down. When
there is no Tone-Clock generating the system clock on an EPN, then
an Expansion Interface circuit pack can only be reset once. All
subsequent reset attempts fail. It is also possible that the system itself
may have already tried to reset the Expansion Interface circuit pack.
Refer to the TONE-BD (Tone-Clock) Maintenance documentation for
recommended maintenance strategy for Tone-Clock problems.
7. If the reset still fails, execute the Manual Loop Back Procedure on the
opposite PPN Expansion Interface circuit pack. This procedure is
described in the section preceding the "Hardware Error Log Entries
and Test to Clear Values" table for this MO. If the Expansion Interface
circuit pack and the lightwave transceiver are healthy, the problem
must lie with the Expansion Interface circuit pack and its lightwave
transceiver on the EPN end of the fiber or with the fiber itself. Test the
EPN Expansion Interface circuit pack with the manual loop back
procedure and investigate the test results.
Table 10-215. TEST #336 Expansion Interface Reset Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page