this is the ngrep -record when i tried to make a incoming call from PSTN
U 81.21.38.13:57812 -> 81.21.33.35:5060 INVITE sip:22030980@81.21.33.35:5060 SIP/2.0. Via: SIP/2.0/UDP 81.21.38.13:5060. From: sip:22498045@81.21.38.13;tag=78415468-CC3. To: sip:22030980@81.21.33.35. Date: Fri, 15 Sep 2006 09:15:20 GMT. Call-ID: 8BB4320C-43D111DB-9F91880F-F0154510@81.21.38.13. Supported: timer,100rel. Min-SE: 1800. Cisco-Guid: 3763255713-1164120539-2201223171-3126568985. User-Agent: Cisco-SIPGateway/IOS-12.x. Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO. CSeq: 101 INVITE. Max-Forwards: 6. Remote-Party-ID: <sip:22498045@81.21.38.13
;party=calling;screen=yes;privacy=off.
Timestamp: 1158311720. Contact: sip:22498045@81.21.38.13:5060. Expires: 180. Allow-Events: telephone-event. Content-Type: application/sdp. Content-Length: 274. . v=0. o=CiscoSystemsSIP-GW-UserAgent 9485 5123 IN IP4 81.21.38.13. s=SIP Call. c=IN IP4 81.21.38.13. t=0 0. m=audio 17124 RTP/AVP 18 0 8 100. a=rtpmap:18 G729/8000. a=fmtp:18 annexb=no. a=rtpmap:0 PCMU/8000. a=rtpmap:8 PCMA/8000. a=rtpmap:100 X-NSE/8000. a=fmtp:100 192-194.
# U 81.21.33.35:5060 -> 81.21.38.13:5060 SIP/2.0 407 Proxy Authentication Required. Via: SIP/2.0/UDP 81.21.38.13:5060. From: sip:22498045@81.21.38.13;tag=78415468-CC3. To: sip:22030980@81.21.33.35;tag=74961b5b71b6ddce908b9155b956083f.58b5. Call-ID: 8BB4320C-43D111DB-9F91880F-F0154510@81.21.38.13. CSeq: 101 INVITE. Proxy-Authenticate: Digest realm="81.21.33.35", nonce="450a6fac7fc0d4000fd13a85f7f6c55323ed6a5c". Content-Length: 0. Warning: 392 81.21.33.35:5060 "Noisy feedback tells: pid=24505 req_src_ip= 81.21.38.13 req_src_port=57812 in_uri=sip:22030980@81.21.33.35:5060 out_uri= sip:22030980@81.21.33.35:5060 via_cnt==1". .
# U 81.21.38.13:57812 -> 81.21.33.35:5060 ACK sip:22030980@81.21.33.35:5060 SIP/2.0. Via: SIP/2.0/UDP 81.21.38.13:5060. From: sip:22498045@81.21.38.13;tag=78415468-CC3. To: sip:22030980@81.21.33.35;tag=74961b5b71b6ddce908b9155b956083f.58b5. Date: Fri, 15 Sep 2006 09:15:20 GMT. Call-ID: 8BB4320C-43D111DB-9F91880F-F0154510@81.21.38.13. Max-Forwards: 6. Content-Length: 0. CSeq: 101 ACK. .
# U 81.21.38.13:51826 -> 81.21.33.35:5060 INVITE sip:22030980@81.21.33.35:5060 SIP/2.0. Via: SIP/2.0/UDP 81.21.38.13:5060. From: sip:22498045@81.21.38.13;tag=78415970-1FEC. To: sip:22030980@81.21.33.35. Date: Fri, 15 Sep 2006 09:15:22 GMT. Call-ID: 8C78BCF5-43D111DB-9F95880F-F0154510@81.21.38.13. Supported: timer,100rel. Min-SE: 1800. Cisco-Guid: 3776566429-1164120539-2202206211-3126568985. User-Agent: Cisco-SIPGateway/IOS-12.x. Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO. CSeq: 101 INVITE. Max-Forwards: 6. Remote-Party-ID: <sip:22498045@81.21.38.13
;party=calling;screen=yes;privacy=off.
Timestamp: 1158311722. Contact: sip:22498045@81.21.38.13:5060. Expires: 180. Allow-Events: telephone-event. Content-Type: application/sdp. Content-Length: 274. .
And these messages are repeating until the requested time out;-)
Whats wrong here :-
Hope this information can help me
Thanks, Ravi.