I am using the sample configuration file called "features-callfwd.5.0.cfg" with some modification. UA dials a 8 digits number and if it is not in the location table, prefix('9') will be appended in the number and route to the PSTN gateway. According to the configuration below, route 6 is responsible for call forward. With appropriate records in usr_preferences, openser can perform direct forward and forward on busy. However, in foward on no answer, one of the party can't hear any voice from the other party. I think the flow is something like this. UA1 openser UA5 UA6 ------INVITE----> --------INVITE------------> ... <-------time out/no answer- ------------------INVITE------------------> ... <--------------RTP established----------------------------------> result: UA6 can hear UA1, but UA1 can't get any sound from UA6 Anyone can help if there is any mistable in my configuration file to fix the above problem. Thanks! ------------start configuration------------- # $Id: features-callfwd.cfg 15 2005-09-15 17:37:10Z /CN=Greger V. Teigre/emailAddress=greger(a)onsip.org $ debug=3 fork=yes log_stderror=no listen=203.193.16.226 # INSERT YOUR IP ADDRESS HERE port=5060 children=4 dns=yes rev_dns=no fifo="/tmp/openser_fifo" fifo_db_url="mysql://openser:openserrw@localhost/openser" #fifo_mode=0666 #fifo permissions can be changed here log_facility=LOG_LOCAL0 alias=01.ol.com loadmodule "/usr/local/lib/openser/modules/mysql.so" loadmodule "/usr/local/lib/openser/modules/sl.so" loadmodule "/usr/local/lib/openser/modules/tm.so" loadmodule "/usr/local/lib/openser/modules/rr.so" loadmodule "/usr/local/lib/openser/modules/maxfwd.so" loadmodule "/usr/local/lib/openser/modules/usrloc.so" loadmodule "/usr/local/lib/openser/modules/registrar.so" loadmodule "/usr/local/lib/openser/modules/auth.so" loadmodule "/usr/local/lib/openser/modules/auth_db.so" loadmodule "/usr/local/lib/openser/modules/uri.so" loadmodule "/usr/local/lib/openser/modules/uri_db.so" loadmodule "/usr/local/lib/openser/modules/mediaproxy.so" loadmodule "/usr/local/lib/openser/modules/nathelper.so" loadmodule "/usr/local/lib/openser/modules/textops.so" loadmodule "/usr/local/lib/openser/modules/avpops.so" loadmodule "/usr/local/lib/openser/modules/domain.so" loadmodule "/usr/local/lib/openser/modules/permissions.so" loadmodule "/usr/local/lib/openser/modules/acc.so" loadmodule "/usr/local/lib/openser/modules/xlog.so" loadmodule "/usr/local/lib/openser/modules/uac.so" loadmodule "/usr/local/lib/openser/modules/group.so" modparam("auth_db|permissions|uri_db|usrloc|acc|group", "db_url", "mysql://openser:openserrw@localhost/openser") 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/local/etc/ser/sip-clients") modparam("mediaproxy","rtp_asymmetrics","/usr/local/etc/ser/rtp-clients") modparam("usrloc", "db_mode", 2) #minimize write back window - default is 60 seconds modparam("usrloc", "timer_interval", 10) #use deomain information for user #modparam("usrloc", "use_domain", 1) modparam("registrar", "nat_flag", 6) #The maximum expires value of a Contact modparam("registrar", "max_expires", 120) #all contacts will be ordered in descending modification time order modparam("registrar", "desc_time_order", 1) #modparam("registrar", "use_domain", 1) modparam("rr", "enable_full_lr", 1) #Timer which hits if no final reply for an INVITE modparam("tm", "fr_inv_timer", 27) modparam("tm", "fr_inv_timer_avp", "inv_timeout") modparam("permissions", "db_mode", 1) modparam("permissions", "trusted_table", "trusted") modparam("avpops", "avp_url", "mysql://openser:openserrw@localhost/openser") modparam("avpops", "avp_table", "usr_preferences") modparam("acc", "log_level", 1) modparam("acc", "log_flag", 1) modparam("acc", "db_flag", 1) modparam("uac", "from_restore_mode", "auto") route { xlog("L_INFO","---[$fU-MR]---\n"); # ----------------------------------------------------------------- # Sanity Check Section # ----------------------------------------------------------------- if (!mf_process_maxfwd_header("10")) { xlog("L_INFO","---[$fU-main(91)]: 483 Too Many Hops---\n"); sl_send_reply("483", "Too Many Hops"); return; }; if (msg:len > max_len) { xlog("L_INFO","---[$fU-main(97)]: 483 Message Overflow---\n"); sl_send_reply("513", "Message Overflow"); return; }; #----------------------------------------------------------------- # detect the anonymous incoming call and add anonymous to the uri #----------------------------------------------------------------- if (!has_totag() && (method=="INVITE"||method=="ACK"||method=="CANCEL"||method=="BYE")) { route(7); } #------------------------------------------------------------------ # Accoutnng Section #------------------------------------------------------------------ setflag(1); #t_relay(); # ----------------------------------------------------------------- # Record Route Section # ----------------------------------------------------------------- if (method=="INVITE" && client_nat_test("3")) { # INSERT YOUR IP ADDRESS HERE record_route_preset("203.193.16.226:5060;nat=yes"); } else if (method!="REGISTER") { record_route(); }; # ----------------------------------------------------------------- # Call Tear Down Section # ----------------------------------------------------------------- if (method=="BYE" || method=="CANCEL") { end_media_session(); }; # ----------------------------------------------------------------- # Loose Route Section # ----------------------------------------------------------------- if (loose_route()) { xlog("L_INFO","---[$fU-main(137)]: loose_route()---\n"); if (has_totag() && (method=="INVITE" || method=="ACK")) { if (client_nat_test("3")||search("^Route:.*;nat=yes")){ setflag(6); use_media_proxy(); }; }; route(1); return; }; # ----------------------------------------------------------------- # Call Type Processing Section # ----------------------------------------------------------------- #domian module if (!is_uri_host_local()) { if (is_from_local() || allow_trusted()) { route(4); route(1); } else { xlog("L_INFO","---[$fU-main(159)]: 403 Forbidden---\n"); sl_send_reply("403", "Forbidden"); }; return; }; if (method=="CANCEL") { route(1); return; } else if (method=="INVITE") { route(3); return; } else if (method=="REGISTER") { route(2); return; } else if (method=="ACK") { route(1); return; }; lookup("aliases"); #xlog("L_INFO","SIP line 191: [$fu] to [$tu]\n"); if (uri!=myself) { route(4); route(1); return; }; if (!lookup("location")) { xlog("L_INFO","---[$fU-main(188)]: 404 User Not Found---\n"); sl_send_reply("404", "User Not Found"); return; }; route(1); } route[1] { xlog("L_INFO","---[$fU-R1]---\n"); # ----------------------------------------------------------------- # Default Message Handler # ----------------------------------------------------------------- t_on_reply("1"); if (!t_relay()) { if (method=="INVITE" || method=="ACK") { end_media_session(); }; sl_reply_error(); }; #xlog("L_INFO","SIP Request line 220: [$rm] from [$fu] to [$tu]\n"); } route[2] { xlog("L_INFO","---[$fU-R2]---\n"); # ----------------------------------------------------------------- # REGISTER Message Handler # ----------------------------------------------------------------- sl_send_reply("100", "Trying"); if (!search("^Contact:[ ]*\*") && client_nat_test("7")) { setflag(6); fix_nated_register(); force_rport(); }; if (!www_authorize("","subscriber")) { www_challenge("","0"); return; }; if (!check_to()) { xlog("L_INFO","---[$fU-route2(237)]: 401 Unauthorized---\n"); sl_send_reply("401", "Unauthorized"); return; }; #------------check if the account is activated ---------- if (!is_user_in("From", "active")) { xlog("L_INFO","---[$fU-route2(244)]: 402 Payment Required---\n"); sl_send_reply("402", "Payment Required"); #append_hf("P-hint: PAYMANT REQUIRED\r\n"); return; }; consume_credentials(); if (!save("location")) { sl_reply_error(); }; } route[3] { xlog("L_INFO","---[$fU-R3]---\n"); # ----------------------------------------------------------------- # INVITE Message Handler # ----------------------------------------------------------------- #if (!allow_trusted()) { #if (!proxy_authorize("","subscriber")) { #proxy_challenge("","0"); #return; #} else if (!check_from()) { #sl_send_reply("403", "Use From=ID"); #return; #}; #consume_credentials(); #}; if (client_nat_test("3")) { setflag(7); force_rport(); fix_nated_contact(); }; #if (uri=~"^sip:1[0-9]{10}@") { #strip(1); #}; lookup("aliases"); #xlog("L_INFO","SIP line 292: [$fu] to [$tu]\n"); if (uri!=myself) { route(4); route(1); return; }; #if (uri=~"^sip:011[0-9]*@") { #route(4); #route(5); #return; #}; if (avp_db_load("$ruri/username", "s:callfwd")) { xlog("L_INFO","---[$fU-route3(305)]: destination uri: [$ru]---\n"); setflag(22); avp_pushto("$ruri", "s:callfwd"); xlog("L_INFO","---[$fU-route3(308)]: destination uri: [$ru]---\n"); route(6); return; }; if (!lookup("location")) { xlog("L_INFO","---[$fU]-(route3:315) destination uri: [$du]---\n"); if (uri=~"^sip:[0-9]*@") { xlog("L_INFO","---[$fU-route3(317)]: sip:(0-9*@)---\n"); prefix("9"); route(4); route(5); return; }; xlog("L_INFO","---[$fU-route3(324)]: 404 User Not Found---\n"); sl_send_reply("404", "User Not Found"); return; }; if (avp_db_load("$ruri/username", "s:fwdbusy")) { if (!avp_check("s:fwdbusy", "eq/$ruri/i")) { xlog("L_INFO","---[$fU-route3(331)]: setflag(26)---\n"); setflag(26); }; }; if (avp_db_load("$ruri/username", "s:fwdnoanswer")) { if (!avp_check("s:fwdnoanswer", "eq/$ruri/i")) { xlog("L_INFO","---[$fU-route3(338)]: setflag(27)---\n"); setflag(27); }; }; t_on_failure("1"); route(4); route(1); } route[4] { xlog("L_INFO","---[$fU-R4]---\n"); # ----------------------------------------------------------------- # NAT Traversal Section # ----------------------------------------------------------------- if (isflagset(6) || isflagset(7)) { xlog("L_INFO","---[$fU-route4(357)]: $ru---\n"); if (!isflagset(8)) { xlog("L_INFO","---[$fU-route4(359)]: $ru---\n"); setflag(8); use_media_proxy(); }; }; } route[5] { xlog("L_INFO","---[$fU-R5]---\n"); # ----------------------------------------------------------------- # PSTN Handler # ----------------------------------------------------------------- rewritehost("203.193.16.242"); # INSERT YOUR PSTN GATEWAY IP ADDRESS avp_write("i:45", "inv_timeout"); t_on_failure("1"); route(4); route(1); } route[6] { xlog("L_INFO","---[$fU-R6]---\n"); # ------------------------------------------------------------------------ # Call Forwarding Reply Route Handler # # This must be done as a route block because sl_send_reply() cannot be # called from the failure_route block # ------------------------------------------------------------------------ #if (uri=~"^sip:1[0-9]{10}@") { #strip(1); #}; lookup("aliases"); if (!isflagset(22)) { append_branch(); }; if (uri!=myself) { xlog("L_INFO","---[$fU-route6(405)]: (uri!=myyself)---\n"); route(4); route(1); return; }; #if (uri=~"^sip:011[0-9]*@") { } #if (uri=~"^sip:[0-9]*@") { #xlog("L_INFO","---[$fU-route6(415)]: (app prefix(9))---\n"); #prefix("9"); #route(4); #route(5); #return; #}; if (!lookup("location")) { if (uri=~"^sip:[0-9]*@") { xlog("L_INFO","---[$fU-route6(425)]: (sip:(0-9*@)---\n"); route(4); route(1); return; }; xlog("L_INFO","---[$fU-route6(432)]: 404 User Not Found---\n"); sl_send_reply("404", "User Not Found"); }; route(4); route(1); } route[7] { xlog("L_INFO","---[$fU-R7]---\n"); #if (method=="INVITE"||method=="ACK"||method=="CANCEL"||method=="BYE") { #if (is_user_in("from","")) { #xlog("L_INFO","SIP is_user_in=true\n"); #uac_replace_from("anonymous","sip:anonymous@s01.ol.com"); #} #} if (avp_db_load("$from/username","s:alias")) { xlog("L_INFO","---[$fU-route7(450)]: have alias from aliases- [$avp(s:alias)]---\n"); #uac_replace_from("$avp(s:alias)","sip:$avp(s:alias)@$si"); #uac_replace_from("$avp(s:alias) " ,""); } else { xlog("L_INFO","---[$fU-route7(454)]: no alias from aliases---\n"); }; } onreply_route[1] { xlog("L_INFO","---[$fU-OR1]---\n"); if ((isflagset(6) || isflagset(7)) && (status=~"(180)|(183)|2[0-9][0-9]")) { if (!search("^Content-Length:[ ]*0")) { use_media_proxy(); }; }; if (client_nat_test("1")) { fix_nated_contact(); }; } failure_route[1] { xlog("L_INFO","---[$fU-FR1]---\n"); if (t_check_status("487")) { return; }; if (isflagset(26) && t_check_status("486")) { if (avp_pushto("$ruri", "s:fwdbusy")) { xlog("L_INFO","---[$fU-failure_route1(505)]: fwdbusy---\n"); avp_delete("s:fwdbusy"); resetflag(26); route(6); return; }; }; if (isflagset(27) && t_check_status("408")) { if (avp_pushto("$ruri", "s:fwdnoanswer")) { xlog("L_INFO","---[$fU-failure_route1(515)]: fwdnoanswer---\n"); avp_delete("s:fwdnoanswer"); resetflag(27); route(6); return; }; }; end_media_session(); } -----------end of configuration----------------