Aastra Telecom 41-001343-02 manual Configuring a Backup Outbound Proxy, SIP Outbound Enabled

Global SIP Settings

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 background.
	– 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 background.
	• 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 back- ground.

•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.

Configuring a Backup Outbound Proxy

To configure this feature an Administrator can set the following parameters in the configuration files or the Aastra Web UI:

Parameter	Aastra Web UI Configuration	Configuration File Configuration
sip outbound support	-	✔
sip symmetric udp signaling	-	✔
sip transport protocol	✔	✔
Global Parameters
sip backup outbound proxy	✔	✔
sip backup outbound proxy port	✔	✔
Per-Line Parameters
sip lineN backup outbound proxy	✔	✔
sip lineN backup outbound proxy port	✔	✔

Note:

The “sip outbound support”, “sip symmetric udp signaling”, and “sip transport protocol” parameters are existing parameters on the phone. For more information about these parameters, see Appendix A “SIP Outbound Support”, “Symmetric UDP Signaling Setting”, and “Advanced SIP Settings”.

4-60 41-001343-02 REV04 – 05.2014