Hi when i ran b2bua_simple.py like this python b2bua_simple.py -f -l 172.18.2.187 -p 99999 -n 172.18.2.187 b2bua_simple.py is running 172.18.2.187 and port for this is 99999 and scscf is also running 172.18.2.187:6060 and forward my INVITE message from scscf to b2bua_simple then b2bua got this INVITE message but when b2bua again forward to scscf then we getting 600 bussy every where and call has been terminated. folllowing message i have attache along this mail. can any one let me know what i have to do for successfull call using b2bua_simple.py. python b2bua_simple.py -f -l 172.18.2.187 -p 99999 -n 172.18.2.187 08 Jan 15:26:22/GLOBAL/b2bua: RECEIVED message from 172.18.2.187:6060: INVITE sip:alice@info-spectrum.com SIP/2.0 Record-Route: <sip:mo@scscf.info-spectrum.com:6060;lr> Route: <sip:172.18.2.187:99999;lr>, <sip:iscmark@scscf.info-spectrum.com:6060;lr;s=1;h=0;d=0;a=7369703a626f6240696e666f2d737065637472756d2e636f6d> Record-Route: <sip:mo@pcscf.info-spectrum.com:4060;lr> Via: SIP/2.0/UDP 172.18.2.187:6060;branch=z9hG4bK2ede.b679b107.0 Via: SIP/2.0/UDP 172.18.2.187:4060;branch=z9hG4bK2ede.baaf9433.0 Via: SIP/2.0/UDP 172.18.2.74:2423;rport=2423;branch=z9hG4bK32209 From: <sip:bob@info-spectrum.com>;tag=9791 To: <sip:alice@info-spectrum.com> Call-ID: 1231260517025(a)172.18.2.74 CSeq: 201 INVITE Max-Forwards: 15 Allow: INVITE,ACK,CANCEL,BYE,MESSAGE,OPTIONS,UPDATE,NOTIFY,PRACK Contact: <sip:bob@172.18.2.74:2423;transport=udp>;expires=1000 User-Agent: Mercuro IMS Client Beta (4.0.1011.0) Supported: sdp-anat Content-Type: application/sdp P-Access-Network-Info: 3GPP-UTRAN-TDD;utran-cell-id-3gpp=00000000 Privacy: none Content-Length: 468 P-Asserted-Identity: <sip:bob@info-spectrum.com> P-Charging-Vector: icid-value="P-CSCFabcd4965cdc6000000ea";icid-generated-at=172.18.2.187;orig-ioi="info-spectrum.com" Timestamp: 1231408582 v=0 o=- 3344 3344 IN IP4 172.18.2.74 s=Mercuro IMS Client Session t=0 0 m=audio 30904 RTP/AVP 0 8 101 c=IN IP4 172.18.2.74 a=rtpmap:0 PCMU/8000/1 a=rtpmap:8 PCMA/8000/1 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 m=video 30080 RTP/AVP 111 34 31 c=IN IP4 172.18.2.74 a=rtpmap:111 H263-1998/90000 a=fmtp:111 CIF=2;QCIF=2/MaxBR=2400 a=rtpmap:34 H263/90000 a=fmtp:34 CIF=2;QCIF=2/MaxBR=2400 a=rtpmap:31 H261/90000 a=fmtp:31 CIF=2;QCIF=2/MaxBR=2400 08 Jan 15:26:22/GLOBAL/b2bua: SENDING message to 172.18.2.187:6060: SIP/2.0 100 Trying Via: SIP/2.0/UDP 172.18.2.187:6060;branch=z9hG4bK2ede.b679b107.0 Via: SIP/2.0/UDP 172.18.2.187:4060;branch=z9hG4bK2ede.baaf9433.0 Via: SIP/2.0/UDP 172.18.2.74:2423;rport=2423;branch=z9hG4bK32209 Record-Route: <sip:mo@scscf.info-spectrum.com:6060;lr> Record-Route: <sip:mo@pcscf.info-spectrum.com:4060;lr> From: <sip:bob@info-spectrum.com>;tag=9791 To: <sip:alice@info-spectrum.com> Call-ID: 1231260517025(a)172.18.2.74 CSeq: 201 INVITE Server: Sippy B2BUA (Simple) 08 Jan 15:26:22/GLOBAL/b2bua: SENDING message to 172.18.2.187:5060: INVITE sip:alice@172.18.2.187:5060 SIP/2.0 Via: SIP/2.0/UDP 172.18.2.187:99999;branch=z9hG4bK8801d0c21346d39cb48f86a2abbedc18;rport Max-Forwards: 70 From: <sip:bob@172.18.2.187>;tag=7cb0f980e37d8198e1c1dfeb4af2e531 To: <sip:alice@172.18.2.187> Call-ID: 1231260517025(a)172.18.2.74 CSeq: 200 INVITE Contact: Anonymous <sip:bob@172.18.2.187:99999> Expires: 300 User-Agent: Sippy B2BUA (Simple) cisco-GUID: 288073477-2250398923-1693218158-3417804826 h323-conf-id: 288073477-2250398923-1693218158-3417804826 Content-Length: 468 Content-Type: application/sdp v=0 o=- 3344 3344 IN IP4 172.18.2.74 s=Mercuro IMS Client Session t=0 0 m=audio 30904 RTP/AVP 0 8 101 c=IN IP4 172.18.2.74 a=rtpmap:0 PCMU/8000/1 a=rtpmap:8 PCMA/8000/1 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 m=video 30080 RTP/AVP 111 34 31 c=IN IP4 172.18.2.74 a=rtpmap:111 H263-1998/90000 a=fmtp:111 CIF=2;QCIF=2/MaxBR=2400 a=rtpmap:34 H263/90000 a=fmtp:34 CIF=2;QCIF=2/MaxBR=2400 a=rtpmap:31 H261/90000 a=fmtp:31 CIF=2;QCIF=2/MaxBR=2400 08 Jan 15:26:23/GLOBAL/b2bua: RECEIVED message from 172.18.2.187:5060: SIP/2.0 100 trying -- your call is important to us Via: SIP/2.0/UDP 172.18.2.187:99999;branch=z9hG4bK8801d0c21346d39cb48f86a2abbedc18;rport=34463 From: <sip:bob@172.18.2.187>;tag=7cb0f980e37d8198e1c1dfeb4af2e531 To: <sip:alice@172.18.2.187> Call-ID: 1231260517025(a)172.18.2.74 CSeq: 200 INVITE Server: Sip EXpress router (2.1.0-dev1 OpenIMSCore (i386/linux)) Content-Length: 0 Timestamp: 1231408582 Warning: 392 172.18.2.187:5060 "Noisy feedback tells: pid=3661 req_src_ip=172.18.2.187 req_src_port=34463 in_uri=sip:alice@172.18.2.187:5060 out_uri=sip:alice@172.18.2.187:5060 via_cnt==1" 08 Jan 15:26:33/GLOBAL/b2bua: RECEIVED message from 172.18.2.187:5060: SIP/2.0 600 Busy everywhere - Forwarding to S-CSCF failed Via: SIP/2.0/UDP 172.18.2.187:99999;branch=z9hG4bK8801d0c21346d39cb48f86a2abbedc18;rport=34463 From: <sip:bob@172.18.2.187>;tag=7cb0f980e37d8198e1c1dfeb4af2e531 To: <sip:alice@172.18.2.187>;tag=0fb5d9176cb7d6a1cb577893687b8ec9-47d1 Call-ID: 1231260517025(a)172.18.2.74 CSeq: 200 INVITE Server: Sip EXpress router (2.1.0-dev1 OpenIMSCore (i386/linux)) Content-Length: 0 Timestamp: 1231408593 Warning: 392 172.18.2.187:5060 "Noisy feedback tells: pid=3664 req_src_ip=172.18.2.187 req_src_port=5060 in_uri=sip:alice@172.18.2.187:5060 out_uri=sip:alice@172.18.2.187:5060 via_cnt==0" 08 Jan 15:26:33/GLOBAL/b2bua: SENDING message to 172.18.2.187:5060: ACK sip:alice@172.18.2.187:5060 SIP/2.0 Via: SIP/2.0/UDP 172.18.2.187:99999;rport;branch=z9hG4bK8801d0c21346d39cb48f86a2abbedc18 Max-Forwards: 70 From: <sip:bob@172.18.2.187>;tag=7cb0f980e37d8198e1c1dfeb4af2e531 To: <sip:alice@172.18.2.187>;tag=0fb5d9176cb7d6a1cb577893687b8ec9-47d1 Call-ID: 1231260517025(a)172.18.2.74 CSeq: 200 ACK Expires: 300 User-Agent: Sippy B2BUA (Simple) 08 Jan 15:26:33/GLOBAL/b2bua: SENDING message to 172.18.2.187:6060: SIP/2.0 600 Busy everywhere - Forwarding to S-CSCF failed Via: SIP/2.0/UDP 172.18.2.187:6060;branch=z9hG4bK2ede.b679b107.0 Via: SIP/2.0/UDP 172.18.2.187:4060;branch=z9hG4bK2ede.baaf9433.0 Via: SIP/2.0/UDP 172.18.2.74:2423;rport=2423;branch=z9hG4bK32209 Record-Route: <sip:mo@scscf.info-spectrum.com:6060;lr> Record-Route: <sip:mo@pcscf.info-spectrum.com:4060;lr> From: <sip:bob@info-spectrum.com>;tag=9791 To: <sip:alice@info-spectrum.com>;tag=2ac46b4f62d11be3189628535aa7b381 Call-ID: 1231260517025(a)172.18.2.74 CSeq: 201 INVITE Server: Sippy B2BUA (Simple) 08 Jan 15:26:33/GLOBAL/b2bua: RECEIVED message from 172.18.2.187:6060: ACK sip:alice@info-spectrum.com SIP/2.0 Via: SIP/2.0/UDP 172.18.2.187:6060;branch=z9hG4bK2ede.b679b107.0 From: <sip:bob@info-spectrum.com>;tag=9791 Call-ID: 1231260517025(a)172.18.2.74 To: <sip:alice@info-spectrum.com>;tag=2ac46b4f62d11be3189628535aa7b381 CSeq: 201 ACK Route: <sip:orig@scscf.info-spectrum.com:6060;lr> User-Agent: Sip EXpress router(2.1.0-dev1 OpenIMSCore (i386/linux)) Content-Length: 0