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Cisco Bug: CSCuq19667 - ATA 187 Unregisters due to low BW link and reboot need to fix

Last Modified

Mar 05, 2018

Products (34)

  • Cisco IP Phone 8800 Series
  • Cisco Unified IP Phone Expansion Module 7914
  • Cisco Unified IP Phone 7945G
  • Cisco Unified IP Phone 7971G-GE
  • Cisco Unified IP Phone 9951
  • Cisco Unified IP Phone 7962G
  • Cisco Unified Wireless IP Phone 7920
  • Cisco Unified Wireless IP Phone 7925G
  • Cisco Unified IP Phone 6941
  • Cisco Unified IP Phone 7961G-GE
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Known Affected Releases


Description (partial)

ATA 187 gets unregsitered from the CUCM randomely and a reboot is required to get it registered back. This is noticed on Low BW links(128/256Kb) where there is tcp fragmentation and retransmission due to the low BW.

Happens only when there is a low BW linkf(128/256Kb) where tcp fragmentation and lot of retransmits are seen
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