Avaya Definity SI, Руководство по обслуживанию, Страница: 230 / 2968

Reliability Systems: A Maintenance Aid
555-233-123 6-26 Issue 4 May 2002
b. If the SERVICE STATE field indicates that the 1B carrier Tone-Clock
is “in” (that is, in service) but the SYSTEM CLOCK and SYSTEM
TONES fields indicate that it is “standby,” then check the Error Log
for an active Error Type 3329 against the 1B TONE-BD by issuing
the display error command. If this error exists, proceed to Step 4.
NOTE:
Error Type 3329 implies that the Tone-Clock circuit pack
probably cannot provide system clocks and an attempt to set
the system clocks to this circuit pack would result in a reset
system 2 of the system. When the 1A Duplication Interface
circuit pack is replaced, however, the system experiences a
loss of clock, and a reset system 2 occurs.
If an active Error Type 3329 is not logged against the 1B TONE-BD,
issue the set tone-clock 1B command from the G3MT terminal to
make the 1B carrier Tone-Clock active. Verify that the switch occurs
by issuing the status system command and checking that the
SERVICE STATE, SYSTEM CLOCK and SYSTEM TONES fields
are now “in” and “active.” Proceed to Step 4.
NOTE:
If the 1B Tone-Clock circuit pack is defective the switch may
have failed and a reset system 2 may have occurred. In this
case, proceed to Step 4. However, the system experiences a
loss of clock and another reset system 2 when the 1A
Duplication Interface circuit pack is replaced.
c. If the SERVICE STATE field indicates that the 1B carrier Tone-Clock
is “out” (that is, out-of-service), refer to the TONE-BD (Tone-Clock
circuit pack), TONE-PT (Tone Generator), and TDM-CLK (TDM Bus
Clock) Maintenance documentation in
Chapter 10, ‘‘Maintenance
Object Repair Procedures’’ , to restore it to service. Proceed to Step
4 regardless of whether or not the attempt to restore the 1B
Tone-Clock to service was successful.
NOTE:
If the 1B Tone-Clock was not successfully restored to service,
the system experiences a loss of clock, and a reset system 2
when the 1A Duplication Interface circuit pack is replaced.
4. If the circuit pack to be replaced is the TN772 Duplication Interface, throw
the SPE Select Switch of the replacement Duplication Interface circuit pack
to the same position as the SPE Select Switch on the Duplication Interface
circuit pack that was removed.