Hi Akshai,

in the Via header is a parameter "rport". I have never heard something about this 
parameter.

Maybe this is the reason.

Greeting 

Markus

"Giacomo Vacca" <[EMAIL PROTECTED]> schrieb am 14.07.04 14:08:30:
> 
>  
> Akshai,
> I think that analize the 200 OK message isn't enough. You have to look also
> the INVITE message. If the caller doesnt send the ACK, probably it received
> a 200 OK with some miss or bad-specified header. Also compare tags, and try
> changing the position of some important header (like Via).
> Does the caller send a BYE after the called answered with that 200 OK or
> simply ignor it? Also investigate for RTP troubles.
> Giacomo
> 
> -----Messaggio originale-----
> Da: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Per conto di Akshai
> Parthasarathy
> Inviato: luned� 12 luglio 2004 12.36
> A: [EMAIL PROTECTED]
> Oggetto: [Sip-implementors] ACK generation in SIP
> 
> Hi,
> I am a student working on SIP. I was experimenting with 2 clients, and a
> server that I am working on. 
> 
> Do you have any idea why the following ok message does not generate an ack
> at the client who intiated the call?
> The message has reached its destination (ie. the caller) from the logs.
> 
> RECEIVE TIME: 531703718
> RECEIVE << 198.202.188.44:5070
> SIP/2.0 200 Ok
> From: "Shootist" <sip:[EMAIL PROTECTED]>;tag=1738152086
> To: "Shootme" <sip:[EMAIL PROTECTED]:5060>;tag=36158188
> Contact: <sip:[EMAIL PROTECTED]:5060>
> Call-ID: [EMAIL PROTECTED]
> CSeq: 13066 INVITE
> Server: SIPphone release 1103a
> Content-Type: application/sdp
> Via: SIP/2.0/UDP
> 198.202.189.120:5060;rport;branch=z9hG4bK6B476672AB524263B0B0751BB7800A8
> 2
> Content-Length: 259
> 
> v=0
> o=Shootme 261980734 262003156 IN IP4 206.236.134.137 s=SIPphone c=IN IP4
> 206.236.134.137 t=0 0 m=audio 8000 RTP/AVP 0 98 97 101 a=rtpmap:0 pcmu/8000
> a=rtpmap:98 iLBC/8000
> a=rtpmap:97 speex/8000
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-15
> 
> Thank you,
> Akshai
> 
> 
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