Avaya 555-245-600 manual Modem dial-up backup, S8300/G700/G350 configuration

Survivability for branch office media gateways

In the event of a WAN failure, any IP telephone or media gateway that cannot reach the primary controlling server can register with an LSP controller in survivable mode. In the S8700/G700/ G350 configuration, up to 50 LSPs are available and ready for the fail-over process. The LSP, an S8300 or S8500 Server running Avaya Communication Manager software, is always ready to acknowledge service requests from IP telephones and gateways that can no longer communicate with their main controller. Once the phones and the gateway are registered, end users at the remote site have full feature functionality. This failover process usually takes less than 5 minutes. After failover, the remote system is stable and autonomous.

S8300/G700/G350 configuration

In this configuration, the connectivity path between the G700 or G350 Media Gateway and the

S8300 Server is:

Endpoint <=> IP Network <=> S8300 Server

The link failure discovery and recovery process is the same as above, except there are no C-LAN addresses in the alternate gatekeeper list. In the S8300/G700/G350 configuration, up to 10 LSPs can back up the media gateways that are controlled by the S8300 Server.

Modem dial-up backup

Modem Dial-up Backup feature provides an alternative backup path to the Enterprise headquarters, in order to maintain the control channel between the remote site and the Avaya Communication Manager in the event of main WAN failure. This feature is defined as backup interface for the primary interface for the WAN connectivity. During the switch over calls will not drop.

This feature is supported in G250, G250-BRI and in G350 H.248 Media Gateways. The dial-up back up feature and the remote router can be configured to re-establish connectivity to the main Communication Manager before the gateway or the IP phones switch over to the LSP. This feature supports dial-up to an ISP, in which case requires use of IPSec-VPN tunnel to the main site.

Auto fallback to primary Communication Manager for H.248 media gateways

This feature allows an H.248 media gateway being served by a Local Survivable Processor (LSP) to automatically return to its primary gatekeeper. This feature is connection preserving; that is, stable bearer connections will not drop during this process.

Issue 6 January 2008 273