Hi, calls from a UA that is on public ip go through the pstn gw and terminate ok. Calls from behind NAT get a 503 error from the GW when the INVITE message is sent from SER.
The invite messages for both cases are the same except from the VIA header which for the latter one contains the private ip of the UA. Contact header is ok. Could that be the reason that im getting calls rejected? Is there a way to rewrite the VIA header?
Im including the configuration file i have and some packet dumps of the calls.Thanks!
debug=3 fork=no log_stderror=yes listen=213.207.***.*** # put your server IP address here port=5060 children=8 dns=no rev_dns=no fifo="/tmp/ser_fifo" fifo_db_url="mysql://ser:********@localhost/ser"
#KM added module loadmodule "/usr/lib/ser/modules/exec.so" loadmodule "/usr/lib/ser/modules/mysql.so" loadmodule "/usr/lib/ser/modules/sl.so" loadmodule "/usr/lib/ser/modules/tm.so" loadmodule "/usr/lib/ser/modules/rr.so" loadmodule "/usr/lib/ser/modules/maxfwd.so" loadmodule "/usr/lib/ser/modules/usrloc.so" loadmodule "/usr/lib/ser/modules/registrar.so" loadmodule "/usr/lib/ser/modules/auth.so" loadmodule "/usr/lib/ser/modules/auth_db.so" loadmodule "/usr/lib/ser/modules/uri.so" loadmodule "/usr/lib/ser/modules/uri_db.so" loadmodule "/usr/lib/ser/modules/mediaproxy.so" loadmodule "/usr/lib/ser/modules/nathelper.so" loadmodule "/usr/lib/ser/modules/textops.so" loadmodule "/usr/lib/ser/modules/avpops.so" loadmodule "/usr/lib/ser/modules/domain.so" loadmodule "/usr/lib/ser/modules/permissions.so"
modparam("auth_db|permissions|uri_db|usrloc", "db_url", "mysql://ser:heslo@localhost/ser") modparam("auth_db", "calculate_ha1", 1) modparam("auth_db", "password_column", "password") modparam("nathelper", "rtpproxy_disable", 1) modparam("nathelper", "natping_interval", 0) modparam("mediaproxy","natping_interval", 30) modparam("mediaproxy","mediaproxy_socket", "/var/run/mediaproxy.sock") modparam("mediaproxy","sip_asymmetrics","/usr/etc/ser/sip-clients") modparam("mediaproxy","rtp_asymmetrics","/usr/etc/ser/rtp-clients") modparam("usrloc", "db_mode", 2) modparam("registrar", "nat_flag", 6) modparam("rr", "enable_full_lr", 1) #pstn part----------------------------------------- modparam("tm", "fr_inv_timer", 27) modparam("tm", "fr_inv_timer_avp", "inv_timeout") modparam("permissions", "db_mode", 1) modparam("permissions", "trusted_table", "trusted")
route { # ----------------------------------------------------------------- # Sanity Check Section # ----------------------------------------------------------------- if (!mf_process_maxfwd_header("10")) { sl_send_reply("483", "Too Many Hops"); break; }; if (msg:len > max_len) { sl_send_reply("513", "Message Overflow"); break; }; # ----------------------------------------------------------------- # Record Route Section # ----------------------------------------------------------------- if (method=="INVITE" && client_nat_test("3")) { # INSERT YOUR IP ADDRESS HERE record_route_preset("213.207.***.***:5060;nat=yes"); } else if (method!="REGISTER") { record_route(); }; # ----------------------------------------------------------------- # Call Tear Down Section # ----------------------------------------------------------------- if (method=="BYE" || method=="CANCEL") { end_media_session(); }; # ----------------------------------------------------------------- # Loose Route Section # ----------------------------------------------------------------- if (loose_route()) { if (has_totag() && (method=="INVITE" || method=="ACK")) { if (client_nat_test("3") || search("^Route:.*;nat=yes")) { setflag(6); use_media_proxy(); #log(1,"route:NATED caller in loose route \n"); }; }; route(1); break; }; # ----------------------------------------------------------------- # Call Type Processing Section # ----------------------------------------------------------------- #Check if the target domain is one that the server is responsible for if (!is_uri_host_local()) { log(1,"Call type processing: Target domain is not in the domain pool \n"); #Check to see if the sender is in our own domain and allow messages from pstn,pgw if (is_from_local() || allow_trusted()) { log(1,"Call type processing: Caller is local or trusted \n"); route(4); route(1); } else { log(1,"Call type processing: 403 error \n"); sl_send_reply("403", "Forbidden"); }; break; }; if (method=="CANCEL") { route(1); break; } else if (method=="INVITE") { route(3); break; } else if (method=="REGISTER") { route(2); break; }; lookup("aliases"); if (uri!=myself) { route(4); route(1); break; }; if (!lookup("location")) { sl_send_reply("404", "User Not Found"); break; }; route(1); } route[1] { # ----------------------------------------------------------------- # Default Message Handler # ----------------------------------------------------------------- t_on_reply("1"); if (!t_relay()) { if (method=="INVITE" || method=="ACK") { end_media_session(); }; sl_reply_error(); }; } route[2] { # ----------------------------------------------------------------- # REGISTER Message Handler # ---------------------------------------------------------------- sl_send_reply("100", "Trying"); if (!search("^Contact:[ ]**") && client_nat_test("7")) { setflag(6); fix_nated_register(); force_rport(); }; if (!www_authorize("","subscriber")) { www_challenge("","0"); break; }; if (!check_to()) { sl_send_reply("401", "Unauthorized"); break; }; consume_credentials(); if (!save("location")) { sl_reply_error(); }; } route[3] { # ----------------------------------------------------------------- # INVITE Message Handler # ----------------------------------------------------------------- log (1,"------------route[3]:INVITE handler \n"); #if (allow_trusted()) {log(1,"------------route[3]:User is trusted\n");} ; #check if NATed caller if (!search("^Contact:[ ]**") && client_nat_test("7")) { log (1,"------------route[3]:fixing NAT info \n"); setflag(6); force_rport(); fix_nated_contact(); }; if (!allow_trusted()) { if (!proxy_authorize("","subscriber")) { #log (1,"route[3]:User did not authorise! \n"); proxy_challenge("","1"); #log (1,"route[3]:Sent error 401"); break; } else if (!check_from()) { log (1,"route[3]: 403 error \n"); sl_send_reply("403", "Use From=ID"); break; }; log (1,"route[3]:Consuming credentials.....\n"); consume_credentials(); }; if (client_nat_test("3")) { setflag(7); force_rport(); }; #Strip prefix 00357 , 357 if (uri=~"^sip:00357[0-9]{8}@") { strip(5); } else if ( uri=~"^sip:357[0-9]{8}@") { strip(3); }; lookup("aliases"); if (uri!=myself) { route(4); route(1); break; }; if (uri=~"^sip:00[1-9]*@") { # International PSTN 00* route(4); route(5); break; }; if (!lookup("location")) { if (uri=~"^sip:[0-9]{8}@") { # Domestic PSTN 2??????? route(4); route(5); break; }; sl_send_reply("404", "User Not Found"); break; }; route(4); route(1); } route[4] { # ----------------------------------------------------------------- # NAT Traversal Section # ----------------------------------------------------------------- if (isflagset(6) || isflagset(7)) { use_media_proxy(); }; } route[5] { # ----------------------------------------------------------------- # PSTN Handler # ----------------------------------------------------------------- #Change the destination so it points to PGW rewritehost("213.207.***.***"); # INSERT YOUR PSTN GATEWAY IP ADDRESS avp_write("i:45", "inv_timeout"); route(4); route(1); }
onreply_route[1] { if ((isflagset(6) || isflagset(7)) && (status=~"(180)|(183)|2[0-9][0-9]")) { if (!search("^Content-Length:[ ]*0")) { use_media_proxy(); }; }; if (client_nat_test("1")) { fix_nated_contact(); }; }
==================================================================================================== Packets for failed call behind NAT: ====================================================================================================
ΤΓ²΅����������??����� ½qC~ΐ �ζ��ζ���ώ-Bΰ�LυE�E�Ψ�D��pΜΥΟ²ΥΟ³ΔΔΔ&INVITE sip:99389683@213.207.141.179 SIP/2.0 Via: SIP/2.0/UDP 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE Max-Forwards: 70 User-Agent: PA168S From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 Contact: sip:22000002@192.168.1.6:5060 Proxy-Authorization: Digest username="22000002", realm="213.207.141.179", nonce="4371b5e37010200b061c47bdd2b9e553e3b7128a1", uri="sip:99389683@213.207.141.179", qop=auth, nc=00000001, cnonce="0a4f113b", response="805a849373492c421c9397d1621239b5" CSeq: 2 INVITE Content-Type: application/sdp Content-Length: 292 v=0 o=22000002 80268421 80523176 IN IP4 192.168.1.6 s=SIP CALL c=IN IP4 192.168.1.6 t=0 0 m=audio 11722 RTP/AVP 18 4 0 8 3 97 a=rtpmap:18 G729/8000 a=rtpmap:4 G723/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:3 GSM/8000 a=rtpmap:97 telephone-event/8000 a=fmtp:97 0-15
½qCw zzLυE�ώ-Bΰ�El�?@�@pγΥΟ³ΥΟ²ΔΔXΙnSIP/2.0 100 trying -- your call is important to us Via: SIP/2.0/UDP 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE;rport=5060;received=213.207.141.178 From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 CSeq: 2 INVITE Server: Sip EXpress router (0.9.3 (i386/linux)) Content-Length: 0 Warning: 392 213.207.141.179:5060 "Noisy feedback tells: pid=8885 req_src_ip=213.207.141.178 req_src_port=5060 in_uri=sip:99389683@213.207.141.179 out_uri=sip:99389683@213.207.144.6 via_cnt==1"
½qCρ �Δ��Δ���ΉR.�ώ-Bΰ�E?�@�@mDΥΟ³ΥΟΔΔΆΝ INVITE sip:99389683@213.207.144.6 SIP/2.0 Record-Route: sip:99389683@213.207.141.179:5060;nat=yes;ftag=vW5KTCrnEpud7yyE;lr=on Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0 Via: SIP/2.0/UDP 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE Max-Forwards: 16 User-Agent: PA168S From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 Contact: sip:22000002@213.207.141.178:5060 CSeq: 2 INVITE Content-Type: application/sdp Content-Length: 316 v=0 o=22000002 80268421 80523176 IN IP4 192.168.1.6 s=SIP CALL c=IN IP4 213.207.141.179213.207.141.179 t=0 0 m=audio 3506435064 RTP/AVP 18 4 0 8 3 97 a=rtpmap:18 G729/8000 a=rtpmap:4 G723/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:3 GSM/8000 a=rtpmap:97 telephone-event/8000 a=fmtp:97 0-15
½qCy1 Δ��Δ���ΉR.�ώ-Bΰ�E?<@@mCΥΟ³ΥΟΔΔΆΝ INVITE sip:99389683@213.207.144.6 SIP/2.0 Record-Route: sip:99389683@213.207.141.179:5060;nat=yes;ftag=vW5KTCrnEpud7yyE;lr=on Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0 Via: SIP/2.0/UDP 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE Max-Forwards: 16 User-Agent: PA168S From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 Contact: sip:22000002@213.207.141.178:5060 CSeq: 2 INVITE Content-Type: application/sdp Content-Length: 316 v=0 o=22000002 80268421 80523176 IN IP4 192.168.1.6 s=SIP CALL c=IN IP4 213.207.141.179213.207.141.179 t=0 0 m=audio 3506435064 RTP/AVP 18 4 0 8 3 97 a=rtpmap:18 G729/8000 a=rtpmap:4 G723/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:3 GSM/8000 a=rtpmap:97 telephone-event/8000 a=fmtp:97 0-15
½qCh ΄��΄���ώ-Bΰ�ΉR.�E�¦f~@�ϋNoΥΟΥΟ³ΔΔ'^ SIP/2.0 100 Trying Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0 Via: SIP/2.0/UDP 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 CSeq: 2 INVITE Content-Length: 0
½qCο��΄��΄���ώ-Bΰ�ΉR.�E�¦f@�ϋNnΥΟΥΟ³ΔΔ'^ SIP/2.0 100 Trying Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0 Via: SIP/2.0/UDP 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 CSeq: 2 INVITE Content-Length: 0
½qCΎΊ�ξ��ξ���ώ-Bΰ�ΉR.�E�ΰf?@ϋN3ΥΟΥΟ³ΔΔΜ"SIP/2.0 503 Service Unavailable Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0 Via: SIP/2.0/UDP 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 CSeq: 2 INVITE Contact: sip:99389683@213.207.144.6:5060 Content-Length: 0
½qCe»""ΉR.�ώ-Bΰ�E.�@�@osΥΟ³ΥΟΔΔqΚΫACK sip:99389683@213.207.144.6 SIP/2.0 Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0 From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 CSeq: 2 ACK User-Agent: Sip EXpress router(0.9.3 (i386/linux)) Content-Length: 0
½qC>»RRLυE�ώ-Bΰ�E @@q«ΥΟ³ΥΟ²ΔΔΘΆSIP/2.0 503 Service Unavailable Via: SIP/2.0/UDP 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 CSeq: 2 INVITE Contact: sip:99389683@213.207.144.6:5060 Content-Length: 0
½qCn�?��?���ώ-Bΰ�LυE�E��E��r ΥΟ²ΥΟ³ΔΔ"ACK sip:99389683@213.207.141.179 SIP/2.0 Via: SIP/2.0/UDP 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE Max-Forwards: 70 User-Agent: PA168S From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 Contact: sip:22000002@192.168.1.6:5060 Proxy-Authorization: Digest username="22000002", realm="213.207.141.179", nonce="4371be370510200b061c47bdd2b9e553e3b7128a1", uri="sip:99389683@213.207.141.179", qop=auth, nc=00000001, cnonce="0a4f113b", response="805a849373492c421c9397d1621239b5" CSeq: 2 ACK Content-Length: 0
½qCΕ8 �RRLυE�ώ-Bΰ�E �@�@q?ΥΟ³ΥΟ²ΔΔΘΆSIP/2.0 503 Service Unavailable Via: SIP/2.0/UDP 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 CSeq: 2 INVITE Contact: sip:99389683@213.207.144.6:5060 Content-Length: 0
½qCγέ �?��?���ώ-Bΰ�LυE�E��F��rΥΟ²ΥΟ³ΔΔ"ACK sip:99389683@213.207.141.179 SIP/2.0 Via: SIP/2.0/UDP 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE Max-Forwards: 70 User-Agent: PA168S From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 Contact: sip:22000002@192.168.1.6:5060 Proxy-Authorization: Digest username="22000002", realm="213.207.141.179", nonce="4371be370105200b061c47bdd2b9e553e3b7128a1", uri="sip:99389683@213.207.141.179", qop=auth, nc=00000001, cnonce="0a4f113b", response="805a849373492c421c9397d1621239b5" CSeq: 2 ACK Content-Length: 0 ½qC3G RRLυE�ώ-Bΰ�E @@q©ΥΟ³ΥΟ²ΔΔΘΆSIP/2.0 503 Service Unavailable Via: SIP/2.0/UDP 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 CSeq: 2 INVITE Contact: sip:99389683@213.207.144.6:5060 Content-Length: 0 ½qC.κ �?��?���ώ-Bΰ�LυE�E��G��rΥΟ²ΥΟ³ΔΔ"ACK sip:99389683@213.207.141.179 SIP/2.0 Via: SIP/2.0/UDP 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE Max-Forwards: 70 User-Agent: PA168S From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 Contact: sip:22000002@192.168.1.6:5060 Proxy-Authorization: Digest username="22000002", realm="213.207.141.179", nonce="4371be370102005b061c47bdd2b9e553e3b7128a1", uri="sip:99389683@213.207.141.179", qop=auth, nc=00000001, cnonce="0a4f113b", response="805a849373492c421c9397d1621239b5" CSeq: 2 ACK Content-Length: 0 ½qCd RRLυE�ώ-Bΰ�E @@q¨ΥΟ³ΥΟ²ΔΔΘΆSIP/2.0 503 Service Unavailable Via: SIP/2.0/UDP 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 CSeq: 2 INVITE Contact: sip:99389683@213.207.144.6:5060 Content-Length: 0 ½qCA�?��?���ώ-Bΰ�LυE�E��H��rΥΟ²ΥΟ³ΔΔ"ACK sip:99389683@213.207.141.179 SIP/2.0 Via: SIP/2.0/UDP 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE Max-Forwards: 70 User-Agent: PA168S From: "22000002" sip:22000002@213.207.141.179;tag=vW5KTCrnEpud7yyE To: "99389683" sip:99389683@213.207.141.179;tag=1367353431 Call-ID: Ra1xPN5naYXRZN67@192.168.1.6 Contact: sip:22000002@192.168.1.6:5060 Proxy-Authorization: Digest username="22000002", realm="213.207.141.179", nonce="4371be370102005b061c47bdd2b9e553e3b7128a1", uri="sip:99389683@213.207.141.179", qop=auth, nc=00000001, cnonce="0a4f113b", response="805a849373492c421c9397d1621239b5" CSeq: 2 ACK Content-Length: 0
==================================================================================================== Packets for successful call from public IP: ==================================================================================================== ΤΓ²΅����������??�����½qCjlΏ��Ώ���ώ-Bΰ�ΪβΗ�Eh±%*ϊΟ΅ΥΟ?ΥΟ³ΔΔίINVITE sip:22372673@213.207.141.179 SIP/2.0
Via: SIP/2.0/UDP 213.207.141.181:5060;branch=z9hG4bK-896914ce
From: Kyriakos sip:22000001@213.207.141.179;tag=2f2e13766c08ee3ao0
To: sip:22372673@213.207.141.179
Call-ID: fa843926-7b99844a@213.207.141.181
CSeq: 102 INVITE
Max-Forwards: 70
Proxy-Authorization: Digest username="22000001",realm="213.207.141.179",nonce="4371be42f095d84938c2b65fb9b1d879749453b6e",uri="sip:22372673@213.207.141.179",algorithm=MD5,response="cf863bab65ffbaf6376746eb76cd127c",qop=auth,nc=00000001,cnonce="32d92d6b"
Contact: Kyriakos sip:22000001@213.207.141.181:5060
Expires: 240
User-Agent: Sipura/SPA841-3.1.1(a)
Content-Length: 403
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
Content-Type: application/sdp
v=0
o=- 8038585 8038585 IN IP4 213.207.141.181
s=-
c=IN IP4 213.207.141.181
t=0 0
m=audio 16460 RTP/AVP 0 2 4 8 18 96 97 98 101
a=rtpmap:0 PCMU/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:4 G723/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729a/8000
a=rtpmap:96 G726-40/8000
a=rtpmap:97 G726-24/8000
a=rtpmap:98 G726-16/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:30
a=sendrecv
½qCoOOΪβΗ�ώ-Bΰ�EA�'@�@qΥΟ³ΥΟ?ΔΔ-ΙFSIP/2.0 100 trying -- your call is important to us
Via: SIP/2.0/UDP 213.207.141.181:5060;branch=z9hG4bK-896914ce
From: Kyriakos sip:22000001@213.207.141.179;tag=2f2e13766c08ee3ao0
To: sip:22372673@213.207.141.179
Call-ID: fa843926-7b99844a@213.207.141.181
CSeq: 102 INVITE
Server: Sip EXpress router (0.9.3 (i386/linux))
Content-Length: 0
Warning: 392 213.207.141.179:5060 "Noisy feedback tells: pid=8885 req_src_ip=213.207.141.181 req_src_port=5060 in_uri=sip:22372673@213.207.141.179 out_uri=sip:22372673@213.207.144.6 via_cnt==1"
½qC[oAAΉR.�ώ-Bΰ�E3�"@�@lΎΥΟ³ΥΟΔΔΝ?INVITE sip:22372673@213.207.144.6 SIP/2.0
Record-Route: sip:213.207.141.179;ftag=2f2e13766c08ee3ao0;lr=on
Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bKc56.673dbf01.0
Via: SIP/2.0/UDP 213.207.141.181:5060;branch=z9hG4bK-896914ce
From: Kyriakos sip:22000001@213.207.141.179;tag=2f2e13766c08ee3ao0
To: sip:22372673@213.207.141.179
Call-ID: fa843926-7b99844a@213.207.141.181
CSeq: 102 INVITE
Max-Forwards: 16
Contact: Kyriakos sip:22000001@213.207.141.181:5060
Expires: 240
User-Agent: Sipura/SPA841-3.1.1(a)
Content-Length: 403
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
Content-Type: application/sdp
v=0
o=- 8038585 8038585 IN IP4 213.207.141.181
s=-
c=IN IP4 213.207.141.181
t=0 0
m=audio 16460 RTP/AVP 0 2 4 8 18 96 97 98 101
a=rtpmap:0 PCMU/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:4 G723/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729a/8000
a=rtpmap:96 G726-40/8000
a=rtpmap:97 G726-24/8000
a=rtpmap:98 G726-16/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:30
a=sendrecv
½qCΏα������ώ-Bΰ�ΉR.�E�zf@�ϋNΥΟΥΟ³ΔΔf"QSIP/2.0 100 Trying
Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bKc56.673dbf01.0
Via: SIP/2.0/UDP 213.207.141.181:5060;branch=z9hG4bK-896914ce
From: Kyriakos sip:22000001@213.207.141.179;tag=2f2e13766c08ee3ao0
To: sip:22372673@213.207.141.179;tag=1367353431
Call-ID: fa843926-7b99844a@213.207.141.181
CSeq: 102 INVITE
Content-Length: 0