[SIPForum-discussion] Need Info - UAC behavior

[Gowthaman Desingh]

Hi All,
   I would like to know the expected behavior of the UAC in the below mentioned scenario.

Setup:
         |SIP Phone | -------- |sipp| 
    I have connected a SIP phone back to back with SIPP.

1. I send an INVITE request from the SIP Phone to the sipp with the below mentioned SDP offer.
**********************************
v=0
o=SIPUA 22986 0 IN IP4 9.7.40.253
s=SIP Call
t=0 0
m=audio 19570 RTP/AVP 0 8 18 102 9 101
c=IN IP4 9.7.40.253
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:102 L16/16000
a=rtpmap:9 G722/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
**********************************

2. Accept the call from sipp by sending 200 OK.
   In the 200 OK sent by the sipp, I send the below mentioned SDP answer. The payload number mentioned in the m=line is "12345"(which is invalid). But the payload number mentioned in the attribute is valid (8 - PCMA). 
**********************************
 v=0
 o=user1 53655765 2353687637 IN IP4 9.7.40.50
 s=-
 t=0 0
 a=recvonly
 c=IN IP4 9.7.40.50
 *m=audio 6000 RTP/AVP 12345*
 c=IN IP4 9.7.40.50
 *a=rtpmap:8 PCMA/8000*
 a=sendonly
*********************************** 


My phone is sending 200 OK followed by BYE to terminate the call. Is that a valid behavior. 

Thanks,
Gowthaman D
  


u can reach me on my mobile @ +919886625873
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