User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-673EXP-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 10-192. TEST #238 EI Fiber Out-of-Frame Query Test — Continued
Error
Code
Test
Result Description/Recommendation
Continued on next page