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Cisco Bug: CSCur11717 - Phones stuck in SRST when TFTP is Stressed

Last Modified

Nov 20, 2019

Products (36)

  • Cisco Unified IP Phone 7900 Series
  • Cisco Unified IP Phone 7945G
  • Cisco Unified IP Phone 7962G
  • Cisco Unified IP Phone 9951
  • Cisco Unified IP Phone 7971G-GE
  • Cisco Unified Wireless IP Phone 7920
  • Cisco Unified IP Phone Expansion Module 7914
  • Cisco Unified IP Phone 7911G
  • Cisco Unified IP Phone 7941G
  • Cisco Unified IP Phone 6901
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Known Affected Releases


Description (partial)

CUCM version

SCCP Phone version 7962/7965 will get hung in SRST mode when attempting to contact primary CUCM after network outage.

SCCP Phone version 7962/7965 during a network outage will register to their SRST gateway.  However, after network connectivity is restored to CUCM, some of the phones will remain in SRST mode or will hang while attempting to re-register to it's primary CUCM.

Phone load is 9.3(1)ES13
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