Setup State; Registered State; Teardown - Avaya G450 Manual

Configuring Standard Local Survivability (SLS)

Setup state

In this transitional state, SLS performs the following activities:
1. Checks for proper provisioning data. If there is insufficient provisioning, the registration
request is denied, and SLS returns to the Unregistered state.
2. Initializes SLS components, such as gatekeeper data (for example, IP endpoint's E.164
addresses and passwords), dial plan, and ARS routing.
3. Registers with the media gateway.
4. Creates the H.323 Gatekeeper socket after successful registration.
When Setup is complete, SLS transitions to the Registered state.

Registered state

SLS can only process calls while it is in the Registered state in which it performs the following:
1. Constructs endpoint objects based on board insertion and IP registration.
2. Tears down endpoint objects based on board removal and IP unregistration.
3. Handles registration requests from H.323 endpoints that properly authenticate by using
their extension number as a 'terminal alias', and the password as the registration
encryption key.
4. Handles stimuli from all interfaces to establish and remove calls.
SLS remains in the Registered state as long as the socket to SLS is open.

Teardown

SLS transitions to the Teardown state whenever the following occur:
The G450 administrator uses the set sls disable command from the G450 CLI or
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manual MIB browser using the SNMP read/write attribute avSurvAdminState.
The G450 closes the SLS socket after maintenance determines that it has completed an
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H.248 registration with the primary MGC.
SLS determines that it needs to unregister with the G450 due to internal error conditions.
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Teardown state activities
1. Tears down endpoint objects.
2. Sends unregistration requests to IP endpoints that are not on active calls. IP endpoints
lose registration with SLS and display the discovered IP address during re-registration with
an MGC.
3. Closes the H.323 Gatekeeper socket.
124 Administration for the Avaya G450 Media Gateway