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Cisco Bug: CSCsg38927 - Unknown RTP payload type occurred when negoshiate in G729b.

Last Modified

Feb 09, 2017

Products (1)

  • Cisco 3800 Series Integrated Services Routers

Known Affected Releases

12.4(11.2)T 12.4(3.9)T 12.4(4)T 12.4(6)T 12.4(9)T

Description (partial)


This symptom observed when forwarding call from IP Phone(G711) to IP Phone(G729) during talk with PSTN Phone via MGCP gw.
The following messages are observed in the MGCP GW.

= debug voip rtp packet=
RTP(1111): fs tx d=XXX.XXX.XXX.XXX(22222), pt=99, ts=YYYYYYYY, ssrc=ZZZZZZZZ


Cisco IOS Release 12.4(3.9)T or later.
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