[Serusers] Re-routing to same device in failure_route

Hi Group, Cisco 5300 -----> SER ----> Xten softphone-A ----> Failed call with error code >400 -------> try to route to Xten softphone A(same as previous) I am trying to route calls to softphones in such way that, if call failed by some reason (>400), trying to route second time to the same soft phone using append_brach() and t_relay() like below. But, soft phone is unable process INVITE message for some reason. But, if I forward failed call different soft phone, call was successful. Am I doing any thing wrong in config ??? Thanks for your help in advance. Regards, Karun ########################################################################################## # # $Id: ser.cfg,v 1.21.4.1 2003/11/10 15:35:15 andrei Exp $ # # simple quick-start config script # # ----------- global configuration parameters ------------------------ #debug=9 # debug level (cmd line: -dddddddddd) #fork=yes #log_stderror=no # (cmd line: -E) /* Uncomment these lines to enter debugging mode debug=7 fork=no log_stderror=yes */ check_via=no # (cmd. line: -v) #dns=no # (cmd. line: -r) #rev_dns=no # (cmd. line: -R) dns=no # (cmd. line: -r) rev_dns=no # (cmd. line: -R) #port=5060 #children=4 fifo="/tmp/ser_fifo" #alias=voip.cafe.bevocal.com #alias=66.77.14.238 alias=209.233.189.177 alias=voice.engca.bevocal.com # ------------------ module loading ---------------------------------- # Uncomment this if you want to use SQL database #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/exec.so" loadmodule "/usr/lib/ser/modules/textops.so" #loadmodule "/usr/lib/ser/modules/acc.so" #modparam("acc", "log_level", 2) #modparam("acc", "log_flag", 1) #modparam("acc", "report_cancels", 1) #modparam("acc", "failed_transactions", 1) # Uncomment this if you want digest authentication # mysql.so must be loaded ! #loadmodule "/usr/lib/ser/modules/auth.so" #loadmodule "/usr/lib/ser/modules/auth_db.so" # ----------------- setting module-specific parameters --------------- # -- usrloc params -- modparam("usrloc", "db_mode", 0) # Uncomment this if you want to use SQL database # for persistent storage and comment the previous line #modparam("usrloc", "db_mode", 2) # -- auth params -- # Uncomment if you are using auth module # #modparam("auth_db", "calculate_ha1", yes) # # If you set "calculate_ha1" parameter to yes (which true in this config), # uncomment also the following parameter) # #modparam("auth_db", "password_column", "password") # -- rr params -- # add value to ;lr param to make some broken UAs happy modparam("rr", "enable_full_lr", 1) # ------------------------- request routing logic ------------------- # 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; }; # if the request is for other domain use UsrLoc # (in case, it does not work, use the following command # with proper names and addresses in it) if (uri==myself) { if (method=="REGISTER") { save("location"); break; }; if(method=="INVITE") { log(1,"about lookup in route zero"); if (!lookup("location")) { log(1,"lookup failed :SIP request from config"); sl_send_reply("404", "Not Found"); break; }; t_on_failure("5"); }; }; # forward to current uri now; use stateful forwarding; that # works reliably even if we forward from TCP to UDP if (!t_relay()) { sl_reply_error(); }; } failure_route[5] { log(1,"Inside failure_route five"); revert_uri(); append_branch(); if (!lookup("location")) { log(1,"lookup failed :SIP request from config"); t_reply("404", "Not Found"); break; }; if (!t_relay()) { sl_reply_error(); }; } ######################################################################################