AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 234)

41-001343-01 Rev 03, Release 3.2.2 4-71
SIP Outbound Enabled and
backup proxy and backup registrar
configured, • 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.
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.
• 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.
backup outbound proxy configured only, • 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.