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Cisco Bug: CSCsz02803 - SIP Inspect fails when CFA or SNR

Last Modified

Feb 22, 2014

Products (32)

  • Cisco IOS
  • Cisco 888W Integrated Services Router
  • Cisco 881SRSTW Integrated Services Router
  • Cisco AS5400XM Universal Gateway
  • Cisco 881W Integrated Services Router
  • Cisco AS5350XM Universal Gateway
  • Cisco Unified Communications 520 for Small Business (UC520)
  • Cisco 881SRST Integrated Services Router
  • Cisco IAD2430 Integrated Access Device
  • Cisco IAD888W Integrated Access Device
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Known Affected Releases


Description (partial)

call flow:
PSTN -- SIP trunk -- CME -- IP phone

a call between PSTN and IP phone, inbound and outbound calls, works fine.

If IP phone is set to CFA or SNR, there is no way audio.

CME version : 7.1
ip inspect sip enabled
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Bug Details Include

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