Server initialization, recovery, and resets
Link Recovery
Maintenance Procedures
131
December 2003
H.248 server-to-gateway Link Recovery
The H.248 link between an Avaya server running Avaya Communication Manager Software and the
Avaya Media Gateway provides the signaling protocol for:
•
Call setup
•
Call control (user actions such as Hold, Conference, or Transfer) while the call is in progress
•
Call tear-down
If the link goes down, Link Recovery preserves any existing calls and attempts to re-establish the original
link. If the gateway cannot reconnect to the original server, then Link Recovery automatically attempts to
connect with another server or Local Spare Processor (LSP). Link Recovery does not diagnose or repair
the network failure that caused the link outage.
The main Link Recovery topics are:
•
Applicable hardware and adjuncts
•
Conditions that trigger Link Recovery
•
•
•
•
•
•
Administering the server timer
•
Administering the Media Gateway
Applicable hardware and adjuncts
H.248 Link Recovery is compatible with:
•
Avaya Communication Manager Release 1.3 and higher
•
Avaya S8300/S8500/S8700 Media Servers with Avaya
G700 Media Gateway and Avaya
Media
Modules and all applicable endpoints.
NOTE:
The software and firmware versions on the server and the gateway must match (Release
1.3). If they do not match, the intent of Link Recovery is circumvented because the
gateway resets (drops calls) as soon as the link loss is detected.
Conditions that trigger Link Recovery
Link Recovery begins with detection of either:
•
A TCP socket failure on the H.248 link
or
•
Loss of the H.248 link within 40-60 seconds
Summary of Contents for CMC1
Page 1: ...Maintenance Procedures 555 245 103 Issue 1 1 December 2003 ...
Page 14: ...Contents 14 Maintenance Procedures December 2003 ...
Page 416: ...Additional maintenance procedures IP Telephones 416 Maintenance Procedures December 2003 ...
Page 426: ...Index X 426 Maintenance Procedures December 2003 ...