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DEFINITY Enterprise Communication Server Release 9
Installation and Maintenance for Survivable Remote EPN 555-233-121
2
SREPN Maintenance
Maintenance procedure
To troubleshoot this alarm:
1. Refer to the CARR-POW Maintenance Object in Chapter 10 of DEFINITY
ECS Release 9 Maintenance for R9si for information on resolving this
alarm.
NOTE:
When power is restored, the system comes up in Normal mode. If the power
outage is longer than the holdover time of the EPN battery but shorter than
the holdover time for the SRP battery, the R9si system (SRP) can come up
in Survive mode.
-48V backup power to the TN2301 circuit pack
Loss of the -48V backup power from the wall field to the TN2301 generates an
alarm (major or minor, depending on administration) against the EXT-DEV
(External Device) Maintenance Object. Visually, this condition is evident by the
TN2301's red BKUP LED on steady. To troubleshoot this alarm:
1. Review the
with the cabling and connections both to and from the cross-connect wall
field.
2. Check the connections to the cabinet and wall field before replacing the
board. Check for -48V across pins 41 and 42 of the cross-connect field.
See
3. If power in all cabinets is good, the -48V connections on the circuit pack
may be bad. Replace the circuit pack using the procedures outlined in the
''Replacing the TN2301 circuit pack''
System resets
Resetting the Release 9r with either the reset system 4 or reset system 5
commands breaks down and then re-establishes the PPN-to-EPN links during the
reset sequence. Since these links may be down longer than 3 minutes, the
SREPN maintenance circuit pack (TN775C) signals the TN2301 circuit pack to
begin the transfer sequence to Survivable Remote Mode. This sequence is
detailed earlier in
1. Ensure that the Release 9r reset sequence is complete before proceeding.
2. Check the status of the link connections (status health) on both the
Release 9r and the SRP systems to determine whether the link between
the Release 9r and the EPN is up
3. Test the fiber connections:
''MDF connections''
''110 block cross-connect pins''
Table 2-4 on page
a. Enter test fiber-link <number> [a-pnc | b-pnc] if duplicated, [short
| long] for either fiber or DS1 CONV connections.
b. If the test fails, continue to troubleshoot the connection problem; if it
passes, continue with Step 4.
section in
Chapter 1
for more information.
section.
2-8.
(Table 2-7 on page
Issue 2
November 2000
2-24
to familiarize yourself
2-18).
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