Avaya S8700 Series, Maintenance Manual

Page: 1507 / 2618

EXP-INTF (Expansion Interface Circuit Pack)
Issue 1 May 2002 8-785 555-233-143
n. Error Types 3074 and 3075—Failures of the EI circuit pack Packet Path
test. This packet path test exercises circuitry on the EI circuit pack, the
neighbor EI or SNI circuit pack, and any intervening DS1 CONV circuit
packs (if the PN is remoted).
1. Certain packet-bus faults can cause these errors without the EI
being defective. Check to see if PKT-BUS errors are also present.
If they are, use the
‘‘PKT-BUS (Packet Bus)’’ section of this chapter
and Packet Bus Fault Isolation and Repair in Chapter 5, ‘‘Additional
Maintenance Procedures’’ to diagnose the problem.
2. If Error Type 3075 is present without Error Type 3074, replace the EI
circuit pack.
3. If Error Type 3074 exists with or without 3075, run test board
UUCSS on the EI, and follow the repair procedures for any test that
does not pass.
4. If PKT-BUS errors are absent and replacing the EI does not resolve
the problem, there is still the possibility of a packet-bus fault. See
Packet Bus Fault Isolation and Repair in
Chapter 5, ‘‘Additional
Maintenance Procedures’’ .
o. Error Type 3330—Indicates a failure of a diagnostic component on the EI
circuit pack. The failed component will not impair service, but it may leave
the EI circuit pack in a state where the EI circuit pack cannot detect errors.
1. Replace the EI circuit pack at a time when it is most convenient for
the customer (this may cause service outages).
p. Error Type 3585—Indicates that the EI circuit pack experienced a series of
very short out-of-frame conditions within several minutes. This may
indicate transmission difficulties over the fiber link. If this condition ceases,
the warning alarm should be resolved within 15 minutes.
1. Enter display errors and resolve any SNC-BD, TDM-BUS,
TDM-CLK or SYNC errors.
2. Perform the “Fiber Fault Isolation Procedure” described in Chapter
5.
3. If the alarm is not resolved within the next 15 minutes, replace the
lightwave transceiver on the EI circuit pack reporting the problem
and on the connected EI circuit pack, SNI circuit pack, or DS1
CONV circuit pack.
4. If the alarm is not resolved within the next 15 minutes, replace the EI
circuit pack reporting the alarm.
5. If the alarm is not resolved within the next 15 minutes, replace the
connected EI circuit pack, SNI circuit pack or DS1 CONV circuit
pack.
q. Error Type 3841—Indicates the EI has reported a loss of lock with the
backplane system clock.