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DEFINITY Enterprise Communication Server Release 9
Installation and Maintenance for Survivable Remote EPN 555-233-121
2
SREPN Maintenance
Fault isolation procedures
4. If all of the SNIs and SNCs are not inserted (No Board displays for each
board) in the entire PNC (either the a-pnc or the b-pnc), then the link
between the PPN EI (on the PNC where SNI and SNC circuit packs did not
insert) and the connected SNI is not functioning properly.
5. If the system has a two-level switch node carrier configuration, that is ( all
must apply)
Then perform the following steps:
6. If software is unable to communicate with an EPN EI, but can communicate
with the connected SNI:
7. Disconnect the transmit and receive fiber pair from the fiber connectors on
the back of the cabinet.
a. Run the test board UUCSS command on the PPN EI and fix any
problems found.
b. Perform the manual loopback procedure for the PPN EI.
c. Perform the manual loopback procedure for the SNI connected to
the PPN EI.
d. Replace the active SNC.
SNI-SNI fiber links exist
The SNIs and SNCs in the second switch node carrier only (the
switch node carrier that has no SNI connected to the PPN EI) are
not inserted
At least two SNI-SNI fiber links exist
a. Run the test board UUCSS long command on the SNIs in the first
switch node carrier that are connected to SNIs in the second switch
node carrier and fix any problems found.
b. Replace the active SNC.
c. Perform the manual loopback procedure for the SNIs in the second
switch node carrier that are connected to SNIs in the first switch
node carrier.
a. Run the test board UUCSS long command on the connected SNI
and fix any problems found.
b. Busyout the EI or SNI circuit pack (busyout board UUCSS).
NOTE:
Note which is the transmit and which is the receive side for
proper re-connection at the end of this procedure.
Issue 2
November 2000
2-34
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