Filter
Top Products
Communication Manager Maintenance-Object Repair Procedures
1188 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
the problem was probably that the synchronization on-line reference became invalid. Since
reference switching was disabled, the Tone-Clock did not switch from the invalid reference.
Therefore, the Tone-Clock circuit pack put out a system clock that was “out of spec.” Enter
enable synchronization-switch. If the PN is down, reseat the Tone-Clock circuit
packs on the PN. This action should restore the PN to service.
Execute Steps 3 and 4 in the order most convenient to you and least destructive to the
customer.
3. Check to see if the fiber-optic cable is transmitting properly via the following procedure on
one of the out-of-service links, or use the Fiber link fault isolation
in Maintenance
Procedures (03-300192).
a. Carefully record the symptoms (amber LED pattern and test failing) that were occurring
on the PN EI circuit pack and the PN EI circuit pack or the connected CI circuit pack in
the case of a Center Stage system. Clearly indicate what symptoms are occurring on
which EI/SNI circuit pack.
!
CAUTION:
CAUTION: Before proceeding, note which is the current transmit fiber and which is the
current receive fiber for proper re-connection.
b. Disconnect the transmit and receive fiber pair from the lightwave transceiver on the back
of one of the EI circuit pack slots that is exhibiting symptoms.
c. Connect what was formerly the transmit fiber to the receive jack.
d. Connect what was formerly the receive fiber to the transmit jack.
e. Perform steps b, c, and d on the opposite end of the fiber and the lightwave transceiver
on the back of the connected EI or SNI circuit pack slot.
f. If the symptoms that were formerly occurring on the EI circuit pack that was exhibiting
these symptoms are now occurring on the connected EI or SNI circuit pack and vice
versa, the fiber is defective and should be replaced.
4. Determine whether the problem is due to a defective active Tone-Clock circuit pack. Refer
to the preceding list of symptoms to decide which network contains the suspect active
Tone-Clock.
!
CAUTION:
CAUTION: If you remove the PN EI circuit pack that is active or that was active when the PN
was last in service, the Tone-Clock lead will revert to the default value which will
cause the Tone-Clock circuit pack located in the A carrier to become the active
Tone-Clock. This characteristic can be deceiving. Replacing or reseating the
active PN EI circuit pack might restore the link(s) temporarily. However, if the
Tone-Clock circuit pack located in the B carrier was really the source of the
problem and not the EI circuit pack, then the link(s) will go down again the next
time a Tone-Clock switch to the Tone-Clock in the B carrier is attempted (probably
when the scheduled Tone-Clock switch occurs).