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Cisco Bug: CSCuq09895 - 78XX series phones fail to stay registered in SRST

Last Modified

Feb 21, 2018

Products (4)

  • Cisco IP Phone 7800 Series
  • Cisco IP Phone 7841
  • Cisco IP Phone 7821
  • Cisco IP Phone 7861

Known Affected Releases


Description (partial)

78XX series phones running firmware sip78xx.10-1-1SR1-4 will register with an SRST reference (during a failover event) however will unregister a short time later (roughly 10 seconds).

The phone sends a register message with the expires timer of '0'.

When using a 78XX series phone with SRST.

IOS version c2900-universalk9-mz.SPA.152-4.M6
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