Avaya S8700 Maintenance Manual page 1491

For multi-connect configurations

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EXP-INTF (Expansion Interface Circuit Pack)

Survivable Remote EPN

The Survivable Remote EPN (SREPN) feature allows a S8700 Multi-Connect

EPN (either MCC or SCC) to provide service to the customer when:

Its fiber (or T1/E1 EI link to the S8700 Multi-Connect processor) fails or is

The S8700 Multi-Connect processor or center stage fails.

This feature is viewed as a "disaster recovery operation" capability rather

than as an additional reliability option.

The SREPN allows a remote EPN cabinet to provide processor (SPE) capabilities

to the EPN in the event of a failure. A logic switch circuit pack (TN2301) located in

the SRPPN detects when the link to the S8700 Multi-Connect is down and

switches to a link from the local SRPPN (TN790-based processor). When the

links to the S8700 Multi-Connect are restored and verified to be stable, the logic

switch is manually reset, and the EPN is reconnected to the links from the S8700

Multi-Connect.

The SREPN feature is not available when an ATM-PNC/EI circuit pack is

used to replace the TN570 EI circuit pack in a direct-connect configuration,

or an ATM Switch is providing the Center Stage (PNC) connectivity.

If you suspect a problem with the TN790B-based R6si SRPPN use the R6si

maintenance documentation supplied with the SREPN feature to resolve

any alarms/errors associated with the SRPPN carrier.

Issue 1 May 2002

Troubleshooting