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Cisco Bug: CSCus78772 - 3905 intermittently sends RTP packets with silence.

Last Modified

Mar 03, 2018

Products (4)

  • Cisco Unified IP Phone 6900 Series
  • Cisco Unified IP Phone 6961
  • Cisco Unified IP Phone 6941
  • Cisco Unified IP Phone 6921

Known Affected Releases


Description (partial)

3905 sends  RTP packets to gateway with silence inside .

Call flow:

When 3905 receives too many calls from PSTN through gateway, it starts sending silence in RTP packets.
Noticed in phone firmware 9.4(1)SR1-3.
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