Redundancy with IP phone and Avaya Aura®

Last Updated : Apr 17, 2026 |
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You can configure Avaya IP phones and Avaya Aura® Communication Manager to support redundancy. Configure the phones to register simultaneously with the following:
  • Two Avaya Aura® Session Manager SIP proxies
  • Two Session Manager instances and one Branch Session Manager instance
  • One Session Manager instance and one Branch Session Manager instance
If the phone loses connection to the primary Session Manager, the phone establishes a connection with the second Session Manager. If the second Session Manager is unavailable, the phone establishes a connection with the third Session Manager. The third Session Manager is a Branch Session Manager.
You can use a non-Avaya Aura® proxy as a survivable proxy. When the phone loses connection with Session Manager, the phone registers to the non-Avaya Aura® proxy and continues the service with minimal disruption. You can configure non-Avaya Aura® proxies as the following:
  • One Session Manager instance and one non-Avaya Aura® proxy
  • Two Session Manager instances and one non-Avaya Aura® proxy
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Call preservation

If the phone loses connection with Session Manager during a call, the phone attempts to sustain the audio path between the phones to preserve the call. Preserving a call is a best-effort service because the audio path can be lost. The phone does not support additional call features for a preserved call, for example, conference call, call transfer, and call forward.