IP Phone Release Notes 1.4.1
New Features in 1.4.1
Backup Proxy/Registrar Support
The IP phones now support a backup SIP proxy and backup SIP registrar feature. If the primary server is unavailable, the phone automatically switches to the backup server allowing the user's phone to remain in service.
How it Works
All SIP registration messages are sent to the primary registrar first. If the server is unavailable, then a new registration request is sent to the backup registrar. This also applies to registration renewal messages, which try the primary server before the backup.
Similarly, any outgoing calls attempt to use the primary proxy first, then the backup if necessary. In addition, subscriptions for BLF, BLA, and explicit MWI can also use the backup proxy when the primary fails. Outgoing calls and the previously mentioned subscriptions behave the same as registrations, where the primary proxy is tried before the backup.
You can configure the backup SIP proxy on a global or
Configuring via the Configuration Files
You can configure the following parameters for a backup SIP proxy and backup SIP registrar.
Global parameters
Parameter – | Aastra Web UI | Advanced |
sip backup proxy ip |
| Basic SIP Network Settings |
Backup Proxy Server | Configuration Files | aastra.cfg, <mac>.cfg |
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(in Web UI) |
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Description | The IP address of the backup SIP proxy server for which the IP phone | |
| uses when the primary SIP proxy is unavailable. | |
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Format | IP address or fully qualified Domain Name | |
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Default Value | 0.0.0.0 |
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Range | Not Applicable |
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Example | sip backup proxy ip: 192.168.0.102 | |
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