H.323 Link Recovery

Last Updated : Jan 11, 2024 |
The H.323 link between an Avaya Gateway and an H.323-compliant IP endpoint 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 endpoint cannot reconnect to the original Gateway, then H.323 Link Recovery automatically attempts to connect to a Survivable Remote Servers.

H.323 Link Recovery does not diagnose or repair the network failure that caused the link outage, however it:

  • Attempts to overcome any network or hardware failure by re-registering the IP Endpoint with its original Gateway

  • Maintains calls in progress during the re-registration attempt

  • Continues trying to reconnect if the call ends and the IP Endpoint has not yet reconnected to its original Gateway

  • Attempts connecting to and registering with an alternate Gateway if so configured.

Synopsis of recovery outcomes are mentioned below:

  • If no gateway is found, the endpoint is out-of-service until it can find a Gateway.

  • If IP endpoint registers with a new gateway, the call ends and the endpoint is available (full features and buttons) through the new gateway.

  • If original gateway accepts re-registration, the endpoint is available (full features and buttons) through the new Gateway.

  • Call in progress but endpoint cannot re-register, a call in progress remains so. No new calls are accepted. Features and buttons are inoperable