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Cisco Bug: CSCtc88714 - uSBC5:RFC2833 not supported for H.323->SIP call with tel-event intwking

Last Modified

Feb 25, 2010

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

Under H.323->SIP Early to Fast  (RFC2833) DTMF scenario, current CUBE-SP call-flows are unoptimized when end-to-end RFC2833 DTMF only is desired.  This results in one extra SIP re-INVITE due to difference in DTMF capabilities advertisement between SIP and H.323.
This scenario occurs when end-to-end RFC-2833 DTMF is desired under H.323->SIP Early to Fast interworking scenario.
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