Hi, I have a problem with loose routing and strict routing. - I have a proxy-registrar SER 0.8.12, it says that Iptel is compliant RFC 3261 - I have a CISCO ATA with code 3.1.0 and its work. - I have a CISCO ATA with code 3.1.1 and when the ACK is send to Iptel the request line is ACK : 0156395148(a)80.118.128.1 And 80.118.128.1 is my gateway Cisco AS5300 to the PSTN, - With the ATA 3.1.0, the ACK is : 0156395148(a)80.118.128.5. And 80.118.128.5 is IPTEL ser. In Cisco Web pages, he says that the new version on ATA 3.1.1 is compliant RFC 3261with loose routing. http://www.cisco.com/en/US/products/hw/gatecont/ps514/prod_release_note09186 a0080238c0a.html Is someone can explain what is not good? Thanks in advance for your help. NICOLAS RUIZ VIVVACTION FRANCE, PARIS THAT'S my conf of SER: # main routing logic route{ # initial sanity checks -- messages with # max_forwards==0, or excessively long requests if (!mf_process_maxfwd_header("10")) { sl_send_reply("483","Too Many Hops"); break; }; if ( msg:len > max_len ) { sl_send_reply("513", "Message too big"); break; }; # we record-route all messages -- to make sure that # subsequent messages will go through our proxy; that's # particularly good if upstream and downstream entities # use different transport protocol record_route(); loose-route processing if (loose_route()) { t_relay(); break; }; /* grant Route routing if route headers present */ if (loose_route()) { t_relay(); break; }; /* record-route INVITEs -- all subsequent requests must visit us */ if (method=="INVITE") { record_route(); }; # now check if it really is a PSTN destination which should be handled # by our gateway; if not, and the request is an invitation, drop it -- # we cannot terminate it in PSTN; relay non-INVITE requests -- it may # be for example BYEs sent by gateway to call originator if (uri=~"sip.vivaction.net"){ if (method=="REGISTER") { # Uncomment this if you want to use digest authentication if (!www_authorize("sip.vivaction.net", "subscriber")) { www_challenge("sip.vivaction.net", "0"); break; }; save("location"); break; }; # native SIP destinations are handled using our USRLOC DB if (!lookup("location")) { if (!proxy_authorize("sip.vivaction.net", "subscriber")) { proxy_challenge("sip.vivaction.net", "1"); break; }; rewritehostport("80.118.128.6:5060"); }; # forward the request now if (!t_relay()) { sl_reply_error(); break; }; }; }