Hello All. This may not be a ser issue. Anyhow, here is a snippet of a SIP conversation from my UTstarcomm iAN-02EX ATA to the PSTN. Once the PSTN gateway sends a re-INVITE message the ATA replies with a 401. Has anyone ever seen this before? Regards, Paul IP Legend --------------- PSTN Gateway - 200.99.100.177 SER Proxy - 67.93.120.33 UTstarcom ATA - 68.84.240.12 U 2004/11/25 21:07:02.138482 200.99.100.177:5060 -> 67.93.120.33:5060 INVITE sip:9990021001@68.84.240.12:60324 SIP/2.0. Via: SIP/2.0/UDP 200.99.100.177:5060;branch=z9hG4bK1fb47bafa1a-f9d0f16. Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bKe5004985c3705e02. To: "UTStarcom" <sip:9990021001@200.99.100.177;bgid=100009995;bgt=private>;tag=4159092737. From: sip:4075551212@sip.mycompany.com;tag=0be7a9eb. Call-ID: 824690162(a)172.16.1.43. CSeq: 27980 INVITE. Max-Forwards: 69. Contact: sip:4075551212@216.229.118.76:4060. Record-Route: <sip:200.99.100.177:5060;lr>. Route: <sip:67.93.120.33:5060;ftag=4159092737;lr=on>. Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO. Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay. Supported: timer. Content-Disposition: session;handling=required. Content-Type: application/sdp. Session-Expires: 240;refresher=uac. Content-Length: 228. . v=0. o=Sonus_UAC 10391 17026 IN IP4 216.229.118.76. s=SIP Media Capabilities. c=IN IP4 216.229.118.101. t=0 0. m=audio 15414 RTP/AVP 18 101. a=rtpmap:18 G729/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=sendrecv. # U 2004/11/25 21:07:02.139790 67.93.120.33:5060 -> 200.99.100.177:5060 SIP/2.0 100 trying -- your call is important to us. Via: SIP/2.0/UDP 200.99.100.177:5060;branch=z9hG4bK1fb47bafa1a-f9d0f16. Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bKe5004985c3705e02. To: "UTStarcom" <sip:9990021001@200.99.100.177;bgid=100009995;bgt=private>;tag=4159092737. From: sip:4075551212@sip.mycompany.com;tag=0be7a9eb. Call-ID: 824690162(a)172.16.1.43. CSeq: 27980 INVITE. Server: mycompany SIP Router (0.8.99-dev19 (i386/linux)). Content-Length: 0. Warning: 392 67.93.120.33:5060 "Noisy feedback tells: pid=13383 req_src_ip=200.99.100.177 req_src_port=5060 in_uri=sip:9990021001@68.84.240.12:60324 out_uri=sip:9990021001@68.84.240.12:60324 via_cnt==2". . # U 2004/11/25 21:07:02.140268 67.93.120.33:5060 -> 68.84.240.12:60324 INVITE sip:9990021001@68.84.240.12:60324 SIP/2.0. Record-Route: <sip:67.93.120.33;ftag=0be7a9eb;lr=on>. Via: SIP/2.0/UDP 67.93.120.33;branch=z9hG4bKf19b.7cb468b4.0. Via: SIP/2.0/UDP 200.99.100.177:5060;branch=z9hG4bK1fb47bafa1a-f9d0f16. Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bKe5004985c3705e02. To: "UTStarcom" <sip:9990021001@200.99.100.177;bgid=100009995;bgt=private>;tag=4159092737. From: sip:4075551212@sip.mycompany.com;tag=0be7a9eb. Call-ID: 824690162(a)172.16.1.43. CSeq: 27980 INVITE. Max-Forwards: 16. Contact: sip:4075551212@216.229.118.76:4060. Record-Route: <sip:200.99.100.177:5060;lr>. Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO. Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay. Supported: timer. Content-Disposition: session;handling=required. Content-Type: application/sdp. Session-Expires: 240;refresher=uac. Content-Length: 228. . v=0. o=Sonus_UAC 10391 17026 IN IP4 216.229.118.76. s=SIP Media Capabilities. c=IN IP4 216.229.118.101. t=0 0. m=audio 15414 RTP/AVP 18 101. a=rtpmap:18 G729/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=sendrecv. # U 2004/11/25 21:07:02.436224 68.84.240.12:60324 -> 67.93.120.33:5060 SIP/2.0 401 Unauthorized. Via: SIP/2.0/UDP 67.93.120.33;branch=z9hG4bKf19b.7cb468b4.0. Via: SIP/2.0/UDP 200.99.100.177:5060;branch=z9hG4bK1fb47bafa1a-f9d0f16. Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bKe5004985c3705e02. From: <sip:4075551212@sip.mycompany.com>;tag=0be7a9eb. To: "UTStarcom" <sip:9990021001@200.99.100.177;bgid=100009995;bgt=private>;tag=4159092737. Call-ID: 824690162(a)172.16.1.43. CSeq: 27980 INVITE. WWW-Authenticate: Digest realm="sip.mycompany.com", nonce="e1ee2e70d502f470c9fd35ce2bd2fdcc", opaque="6183bcbc6a0c54d44f910e532e96896d". Content-Length: 0. . __________________________________ Do you Yahoo!? Meet the all-new My Yahoo! - Try it today! http://my.yahoo.com