Hello. I think there is a problen with your configuration file. You have :

if (method=="INVITE") || (method=="CANCEL") { # Uncomment this if you want to use digest authentication if (!radius_www_authorize("")) { www_challenge("", "0"); break; };

record_route(); rewritehostport("cisco_sip_gw_ip:5060"); if (!t_relay()) { sl_reply_error(); }; break; };

so you're not relaying all the SIP messages, maybe this can work :

if (method=="INVITE") || (method=="CANCEL") { # Uncomment this if you want to use digest authentication if (!radius_www_authorize("")) { www_challenge("", "0"); break; }; };

record_route(); rewritehostport("cisco_sip_gw_ip:5060");

if (!t_relay()) { sl_reply_error(); break; };

Hope this work. Good luck.!!

Ricardo Martinez.-

-----Mensaje original----- De: Todor [mailto:todorakis@gmail.com] Enviado el: Jueves, 10 de Febrero de 2005 8:15 Para: serusers@lists.iptel.org Asunto: [Serusers] bad call flow

Hi All,

I have a serious problem with SIP call flow over SER. My SER don't retransmit ACK first and after that don't retransmit BYE message, too. Can any one advice me? what can be a reason? Here are call flow and ser.cfg.

SIPPHONE------------------------SER--------------------------CISCO SIP GW |-------------INVITE------------>| | |<----------TRying---------------| | | |-----------INVITE-------------->| | |<----------TRying---------------| | |<------------183----------------| |<------------183----------------| |

| |<-------------OK----------------| |---------------ther is two way RTP channel ----------------------| |<-------------OK----------------| | |--------------ACK-------------->| |

| |<-------------OK----------------| |<-------------OK----------------| | |--------------ACK-------------->| | | |<-------------OK----------------| |<-------------OK----------------| | |--------------ACK-------------->| | | |<-------------OK----------------| |<-------------OK----------------| | |--------------ACK-------------->| SER don't retransmit ACK | | | and Cisco timedout after 19sec | | |<-------------BYE---------------| | |<-------------BYE---------------| | |<-------------BYE---------------| | SER don't retransmit BYE |<-------------BYE---------------| | |<-------------BYE---------------|

# # $Id: ser.cfg,v 1.21.4.1 2003/11/10 15:35:15 andrei Exp $ # ----------- global configuration parameters ------------------------

debug=8 fork=yes log_stderror=yes

check_via=no # (cmd. line: -v) dns=no # (cmd. line: -r) rev_dns=no # (cmd. line: -R) port=5060 #children=4 fifo="/tmp/ser_fifo"

# ------------------ module loading ---------------------------------- loadmodule "/usr/local/lib/ser/modules/sl.so" loadmodule "/usr/local/lib/ser/modules/tm.so" loadmodule "/usr/local/lib/ser/modules/rr.so" loadmodule "/usr/local/lib/ser/modules/maxfwd.so" loadmodule "/usr/local/lib/ser/modules/usrloc.so" loadmodule "/usr/local/lib/ser/modules/registrar.so"

loadmodule "/usr/local/lib/ser/modules/auth.so" loadmodule "/usr/local/lib/ser/modules/auth_radius.so"

# ----------------- setting module-specific parameters --------------- modparam("usrloc", "db_mode", 0) modparam("rr", "enable_full_lr", 1) # ------------------------- request routing logic -------------------

route{

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; };

# authenticate register message using radius if (method=="REGISTER") { # Uncomment this if you want to use digest authentication if (!radius_www_authorize("")) { www_challenge("", "0"); break; }; save("location"); break; };

# route (proxy) invite message to gateway if (method=="INVITE") || (method=="CANCEL") { # Uncomment this if you want to use digest authentication if (!radius_www_authorize("")) { www_challenge("", "0"); break; };

record_route(); rewritehostport("cisco_sip_gw_ip:5060"); if (!t_relay()) { sl_reply_error(); }; break; }; }