Overview
S8700 recoverability
Overview for S8700 Media Server 25
November 2003
S8700 recoverability
In addition to the high reliability of the duplicated S8700 Media Servers, the S8300 Media Server in a
Local Survivable Processor (LSP) configuration and a survivable remote EPN can be used to provide
survivability. Additional recovery capability is embedded in the Communication Manager software that
resides on the S8700 Media Server.
8300 Media Server in an LSP mode
The LSP is located in the G700 Media Gateway and provides survivability when the S8700 Media Server
is inaccessible. Each S8700 Media Server can have up to 50 LSPs. The LSP has a copy of the S8700
Media Server customer translations. The translations are updated regularly from the S8700 Media Server
using a virtual link through a IP network. Typically, all LSPs are in idle mode, where the LSP is not
processing any calls. When the Media Gateway’s Processor (MGP) or IP endpoints perceive the Avaya
media server to be unreachable, the MGP or IP endpoints will attempt to register with an LSP. The LSP
does not actively take over when the primary controller becomes unreachable, but waits for MGPs and IP
endpoints to register with it. Switchback from the LSP to the primary Avaya media server is a manual
operation requiring a reset 3 command on the LSP.
Power outages
In most cases an Avaya solution can recover from a power outage or other failure instantly, regardless of
the source of the failure. Each PN includes a set of segmented, parallel buses. If one of the paired
segments fails, the other bus segment continues to handle communications. The UPS units supply power
to the control complex.
High-level capabilities
The S8700 Media Server provides a large-scale solution with a high number of endpoints. Table 1, High-
level capabilities, on page 25 presents a subset of high-level capabilities for the S8700 Media Server. For
more detailed system capacity information refer to the System Capacities Table for Avaya
Communication Manager on Avaya Media Servers. The System Capacities Table for Avaya
Communication Manager on Avaya Media Servers (555-233-605) can be found on the Avaya Support
Web site (http://support.avaya.com
).
Table 1: High-level capabilities 1 of 2
Capability Description
Call processing feature set Avaya Communication Manager, Release 2.0
Reliability options Voice bearer over IP: Duplex and high
Voice bearer over CSS or ATM: Duplex, high, and critical
Port network connectivity Voice bearer over IP: IP
Voice bearer over CSS or ATM: Center Stage Switch
(CSS) or ATM, or direct connect
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