________________________________________
From: [email protected] 
[[email protected]] On Behalf Of Siga 
[[email protected]]

I am encountering some strange problem, I am sending RTP packets from my
Client and when I try to analyze the packets using Wireshark, I can see that
my Wireshark shows *RTP PT:ITU-T G.711 PCMU*, even though I am furnishing
the value of PT = 8 in my RTP Header which is for PCMA (since I am using
Linear2Alaw conversion).

Can anybody let me know what causes this scenario.
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One thing to check for is whether there is any SDP that Wireshark might be 
interpreting.  Contrary to common belief, one can reassign the fixed payload 
types (although it is not recommended), and possibly the SDP says PCMU rather 
than PCMA.  It is also possible that the data is actually PCMU and somehow 
Wireshark is discovering that by looking at the data.  Given the flexibility of 
Wireshark, there is probably a configuration option by which you can instruct 
Wireshark the correct interpretation of payload type 8.

Dale

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