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DEFINITY Enterprise Communication Server Release 9
Installation and Maintenance for Survivable Remote EPN 555-233-121
2
SREPN Maintenance
SREPN connections
Table 2-3
approximate times for each event, and the service affected at each stage.
Table 2-3. Transfer sequence to Survivable Remote mode
If the link between
the Release 9r and an
EPN is down for
1 minute
2-3 minutes
3 minutes
5-6 minutes
a.
Similar to Emergency Transfer mode, only established, intra-EPN calls are preserved. No new or
originating calls can be made.
b.
Transfer to Survive mode includes a cold restart of the SREPN.
c.
Calls using the link back to the Release 9r are not possible.
TN2301 (SRSwitch)
The SRSwitch circuit pack (TN2301) occupies 6 slots in the SRP cabinet.
Figure 2-4
Figure 2-4. TN2301 faceplate switch and LEDs
shows the sequence of events to transfer to the Survive mode, the
Then
Emergency Transfer Mode activated.
System "waits" to determine whether the
Release 9r is going through a reset 3.
Survive mode activated for each SREPN.
Transfer sequence completed; EPN service
restored.
shows the faceplate switch and LEDs for the TN2301 circuit pack.
b
BKUP
DATA
AUTO
RSTR
AUTO
TEST
SURVIVE
MODE ON
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Issue 2
November 2000
Service affected
Only established calls
a
preserved.
Established calls
terminated (restart)
Intra-EPN calls possible
2-7
c
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