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Cisco Bug: CSCun87098 - 8831 RFC 2833 DTMF RTP Event not formatted the the same as other phones

Last Modified

Apr 03, 2016

Products (35)

  • Cisco IP Phone 8800 Series
  • Cisco Unified IP Phone Expansion Module 7914
  • Cisco Unified Wireless IP Phone 7920
  • Cisco Unified IP Phone 7962G
  • Cisco Unified IP Phone 7945G
  • Cisco Unified IP Phone 9951
  • Cisco Unified IP Phone 7971G-GE
  • Cisco Unified IP Phone 7911G
  • Cisco Unified IP Phone 6941
  • Cisco Unified Wireless IP Phone 7925G
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Known Affected Releases


Description (partial)

The first RFC DTMF RTP Event duration is 80ms where other phones use a duration of the initial event with a duration of 0ms.

1) Place call from 8831 to any phone or trunk
2) Review initial DTMF RTP Event for a given digit in sniffer

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