Aastra 9000i Series Administrator's Manual page 234

SIP Outbound Enabled and
backup proxy and backup registrar
configured,
backup proxy, backup registrar, and
backup outbound proxy configured,
Note:
This configuration assumes that the outbound
proxy is maintaining its own outbound
connections to the proxy/registrar.
backup outbound proxy configured only,
41-001343-01 Rev 02, Release 3.2.2
• Establishes flow to the primary proxy and registrar.
• If the flow to the primary registrar fails, the phone:
– establishes flow to the backup registrar.
– registers to the backup registrar.
– attempts to reestablish flow to the primary registrar in the back-
ground.
– When the primary registrar comes back up, the phone unregisters
from the backup and registers with the primary.
• If the flow to the primary proxy fails, the phone:
– establishes flow to the backup proxy.
– registers the new AOR with the active registrar.
– moves subscriptions to the backup proxy.
– attempts to reestablish the flow to the primary proxy in the back-
ground.
• When the flow to the primary proxy is reestablished, the phone:
– registers the primary AOR to the active registrar.
– moves subscriptions to the primary proxy.
– unregisters/unsubscribes from the backup proxy/registrar.
• Establishes a flow to the primary outbound proxy.
• If the flow fails, the phone:
– establishes the flow to the backup proxy.
– registers the backup AOR to the backup registrar.
– moves subscriptions to the backup proxy.
– attempts to reestablish connection to the primary outbound proxy
in the background.
• When the flow to the primary proxy is reestablished, the phone:
– registers the primary AOR to the primary registrar.
– moves the subscriptions to the primary proxy.
– unregisters/unsubscribes from the backup proxy/registrar.
• Establishes a flow to the primary outbound proxy.
• If the flow fails, the phone:
– establishes the flow to the backup proxy.
– registers the backup AOR to the backup registrar.
– moves subscriptions to the backup proxy.
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