Failover for 9600 SIP, J100 series, and Avaya H175 Video Collaboration Station endpoints

Last Updated : Jun 04, 2018 |
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When 9600 SIP, J100 series, and Avaya H175 Video Collaboration Station endpoints lose connectivity, they can failover to another SIP controller. While the endpoints are failing over, they display survivability warning. The failover process is usually completed within two minutes.
During failover:
  • No new calls can be made or received.
  • Held calls are lost.
  • Transfers are lost.
The following table lists key failover scenarios and the types of messages that you might see on each endpoint.
Failover messages
Scenario
Message on 9600 series SIP endpoints
Message on Avaya H175 Video Collaboration Station endpoints
Message on J100 series phones
Extension is idle
The endpoint displays the message Link recovery. Limited phone service. Calls may be lost.
The endpoint displays the message Lost Connection to SIP Server...
The J100 series phone displays Acquiring service during failover when extension is idle.
A call is in progress
Both endpoints display survivability warning with the message Limited phone service. The only call control feature available is End Call. The phone fails over after the call ends.
The J100 series phone will display Limited phone service with Link Recovery. Call may be lost. Users can end call. When call ends, phone will go to Acquiring service and failover.
The endpoint cannot detect an available controller
The endpoint displays the message Acquiring Service... Failover cannot occur until an available SIP controller is detected.
The endpoint displays the message Lost Connection to SIP Server... Failover cannot occur until an available SIP controller is detected.
The J100 series phone displays Acquiring service during failover when all SIP proxy servers are detected to be unreachable.
Related links
Redundancy and high availability configuration