User manual

DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-619EXP-INTF (Expansion Interface Circuit Pack)
10
FAIL Expansion Interface circuit pack could not detect framing sequence.
1. Check if the Expansion Interface circuit pack on the opposite end of
the fiber is present and if its cabinet has power.
2. Verify that the lightwave transceiver is connected to the correct slot on
the back of the cabinet and that the fiber is connected to the lightwave
transceiver. Verify this connection on both ends of the fiber. Check that
an Expansion Interface circuit pack detects its lightwave transceiver by
executing the reset board PCSS command, where PCSS refers to the
Expansion Interface circuit pack. If the reset passes, the Expansion
Interface circuit pack detects a lightwave transceiver. Refer to the
description of the Expansion Interface Reset Test (#336) if the reset
fails.
3. Verify that fiber transmit and receive ends have not been crossed when
connected to the lightwave transceiver.
4. The problem may be due to a synchronization timing loop. Use the
status sync command to determine which circuit pack is the
synchronization reference. If the reference is a DS1 Interface circuit
pack, use the set sync command to make a Tone-Clock circuit pack
the reference. If this action causes the Expansion Interface to go into
frame, synchronization must be examined for a possible timing loop.
Refer to SYNC (Synchronization) Maintenance documentation for repair
procedures. If the DS1 Interface circuit pack is not a reference, and the
Expansion Interface circuit pack that is failing Test #238 is in the PPN,
run tests on Tone-Clock circuit pack in the PPN to determine if clocks
are present. If the Expansion Interface circuit pack that is failing Test
#238 is in the EPN, and the red LEDs are ON on a large number of
circuit packs, then reseat any Tone-Clock circuit packs in the EPN.
More information follows.
Table 10-210. TEST #238 EI Fiber Out-of-Frame Query Test — Continued
Error
Code
Test
Result Description/Recommendation
Continued on next page