Hello,

Hi team I have a kamailio SIP server for call Routing,my call flow is like 

VoipDialer--->Kamailio-Routing Server-->Softswitch-->Telco/PSTN Mobile
caller----------------------------------------------------------------------->calle
                                 
Now Am facing an issue for a call from voip to telco after answering the call
i tried to disconnect.but call is not disconneting..what will i do in kamailio.cfg
pls help me to re-write the script am using tls also


#!KAMAILIO
#!define WITH_MYSQL
#!define WITH_AUTH
#!define WITH_USRLOCDB
#!define WITH_NAT
#!define WITH_TLS

####### Defined Values #########

# *** Value defines - IDs used later in config
# - database URL - used to connect to database server by modules such
#       as: auth_db, acc, usrloc, a.s.o.
#!define FLT_ACC 1
#!define FLT_ACCMISSED 2
#!define FLT_ACCFAILED 3
#!define FLT_NATS 5
#!define FLT_DLG 9

#!define FLB_NATB 10
#!define FLB_NATSIPPING 7

####### Global Parameters #########
### LOG Levels: 3=DBG, 2=INFO, 1=NOTICE, 0=WARN, -1=ERR
#!ifdef WITH_DEBUG
debug=3
log_stderror=yes
#!else
debug=2
log_stderror=no
#!endif

memdbg=5
memlog=5

log_facility=LOG_LOCAL0

fork=yes
children=4

/* uncomment the next line to disable TCP (default on) */
#disable_tcp=yes

/* uncomment the next line to disable the auto discovery of local aliases
   based on reverse DNS on IPs (default on) */
#auto_aliases=no

/* add local domain aliases */
#alias="sip.mydomain.com"

/* uncomment and configure the following line if you want Kamailio to
   bind on a specific interface/port/proto (default bind on all available) */
#listen=udp:10.0.0.10:5060

/* port to listen to
 * - can be specified more than once if needed to listen on many ports */
port=5060
server_signature=yes
server_header="Server: MediaController"
user_agent_header="User-Agent: Vp Dialer 11"
auto_aliases=yes
#listen=udp:xxx.xxx.xxx.xx:5060
listen=udp:xxx.xxx.xxx.xx:5060
listen=tls:xxx.xxx.xxx.xx:443
alias="xxx.xxxx.xxx:443"
alias="xxx.xxx.xxx:5060"

disable_tcp=no
tcp_children=32
tcp_keepalive=no
tcp_max_connections=25000
tcp_send_timeout=3
tcp_connection_lifetime=960
tcp_connect_timeout=5
tcp_no_connect=yes

open_files_limit=1024000

#!ifdef WITH_TLS
enable_tls=yes
#!endif

# life time of TCP connection when there is no traffic
# - a bit higher than registration expires to cope with UA behind NAT
tcp_connection_lifetime=3605

####### Custom Parameters #########

# These parameters can be modified runtime via RPC interface
# - see the documentation of 'cfg_rpc' module.
#
# Format: group.id = value 'desc' description
# Access: $sel(cfg_get.group.id) or @cfg_get.group.id
#

#!ifdef WITH_PSTN
# PSTN GW Routing
#
# - pstn.gw_ip: valid IP or hostname as string value, example:
# pstn.gw_ip = "10.0.0.101" desc "My PSTN GW Address"
#
# - by default is empty to avoid misrouting
pstn.gw_ip = "" desc "PSTN GW Address"
pstn.gw_port = "" desc "PSTN GW Port"
#!endif

#!ifdef WITH_VOICEMAIL
# VoiceMail Routing on offline, busy or no answer
#
# - by default Voicemail server IP is empty to avoid misrouting
voicemail.srv_ip = "" desc "VoiceMail IP Address"
voicemail.srv_port = "5060" desc "VoiceMail Port"
#!endif

####### Modules Section ########

# set paths to location of modules (to sources or installation folders)
#!ifdef WITH_SRCPATH
mpath="modules/"
#!else
mpath="/usr/local/kamailio-4.3/lib64/kamailio/modules/"
#!endif

#!ifdef WITH_MYSQL
loadmodule "db_mysql.so"
#!endif

loadmodule "mi_fifo.so"
loadmodule "kex.so"
loadmodule "corex.so"
loadmodule "tm.so"
loadmodule "tmx.so"
loadmodule "sl.so"
loadmodule "rr.so"
loadmodule "pv.so"
loadmodule "maxfwd.so"
loadmodule "usrloc.so"
loadmodule "registrar.so"
loadmodule "textops.so"
loadmodule "siputils.so"
loadmodule "xlog.so"
loadmodule "sanity.so"
loadmodule "ctl.so"
loadmodule "cfg_rpc.so"
loadmodule "mi_rpc.so"
loadmodule "acc.so"

loadmodule "dialog.so"
loadmodule "dialplan.so"
loadmodule "avpops.so"

#!ifdef WITH_AUTH
loadmodule "auth.so"
loadmodule "auth_db.so"
#!ifdef WITH_IPAUTH
loadmodule "permissions.so"
#!endif
#!endif

#!ifdef WITH_ALIASDB
loadmodule "alias_db.so"
#!endif

#!ifdef WITH_SPEEDDIAL
loadmodule "speeddial.so"
#!endif

#!ifdef WITH_MULTIDOMAIN
loadmodule "domain.so"
#!endif

#!ifdef WITH_PRESENCE
loadmodule "presence.so"
loadmodule "presence_xml.so"
#!endif

#!ifdef WITH_NAT
loadmodule "nathelper.so"
loadmodule "rtpproxy.so"
#!endif

#!ifdef WITH_TLS
loadmodule "tls.so"
#!endif

#!ifdef WITH_ANTIFLOOD
loadmodule "htable.so"
loadmodule "pike.so"
#!endif

#!ifdef WITH_XMLRPC
loadmodule "xmlrpc.so"
#!endif

#!ifdef WITH_DEBUG
loadmodule "debugger.so"
#!endif

# ----------------- setting module-specific parameters ---------------

# ----- mi_fifo params -----
modparam("mi_fifo", "fifo_name", "/var/run/kamailio/kamailio_fifo")
#modparam("mi_fifo", "fifo_name", "/tmp/kamailio_fifo")
#modparam("mi_fifo", "fifo_mode", "0666")
modparam("mi_fifo", "fifo_mode", 0666)

# ----- ctl params -----
#modparam("ctl", "binrpc", "unix:/var/run/kamailio/kamailio_ctl")

# ----- tm params -----
# auto-discard branches from previous serial forking leg
modparam("tm", "failure_reply_mode", 3)
# default retransmission timeout: 30sec
modparam("tm", "fr_timer", 50000)
# default invite retransmission timeout after 1xx: 120sec
modparam("tm", "fr_inv_timer", 120000)
modparam("tm", "restart_fr_on_each_reply", 0)

# ----- rr params -----
# set next param to 1 to add value to ;lr param (helps with some UAs)
#modparam("rr", "enable_full_lr", 1)
# do not append from tag to the RR (no need for this script)
modparam("rr", "append_fromtag", 1)
modparam("rr", "enable_double_rr", 1)

# ----- registrar params -----
#modparam("registrar", "flow_timer", 25)
#modparam("registrar", "method_filtering", 1)
#uncomment the next line to disable parallel forking via location */
# modparam("registrar", "append_branches", 0)
#* uncomment the next line not to allow more than 10 contacts per AOR */
#modparam("registrar", "tcp_persistent_flag", 7)
modparam("registrar", "flow_timer",25)
modparam("registrar", "outbound_mode", 2)
modparam("registrar", "max_contacts", 10)
# max value for expires of registrations
#odparam("registrar", "max_expires", 3600)
# set it to 1 to enable GRUU
#odparam("registrar", "gruu_enabled", 0)

modparam("avpops","db_url","mysql://root:root@127.0.0.1/kamailio")
modparam("avpops","avp_table","GW_Routing")

modparam("dialplan", "db_url", "mysql://root:root@127.0.0.1:3306/kamailio")

modparam("dialog", "dlg_flag",0)
modparam("dialog", "dlg_match_mode",2)
modparam("dialog", "default_timeout", 7200)  # 2 hours timeout
modparam("dialog", "db_mode", 0)


# ----- acc params -----
#/* what special events should be accounted ? */
modparam("acc", "early_media", 0)
#modparam("acc", "report_ack", 0)
modparam("acc", "report_cancels", 0)
#/* by default ww do not adjust the direct of the sequential requests.
 #  if you enable this parameter, be sure the enable "append_fromtag"
  # in "rr" module */
modparam("acc", "detect_direction", 0)
#/* account triggers (flags) */
#modparam("acc", "log_flag", FLT_ACC)
#modparam("acc", "log_missed_flag", FLT_ACCMISSED)
#modparam("acc", "log_extra",
#       "src_user=$fU;src_domain=$fd;src_ip=$si;"
#       "dst_ouser=$tU;dst_user=$rU;dst_domain=$rd")
modparam("acc", "failed_transaction_flag", FLT_ACCFAILED)
#/* enhanced DB accounting */
#!ifdef WITH_ACCDB
#modparam("acc", "db_flag", FLT_ACC)
#modparam("acc", "db_missed_flag", FLT_ACCMISSED)
#modparam("acc", "db_url", DBURL)
#modparam("acc", "db_extra",
#       "src_user=$fU;src_domain=$fd;src_ip=$si;"
#       "dst_ouser=$tU;dst_user=$rU;dst_domain=$rd")
#!endif


# ----- usrloc params -----
#/* enable DB persistency for location entries */
#!ifdef WITH_USRLOCDB
#modparam("usrloc", "db_url", DBURL)
#modparam("usrloc", "db_mode", 2)
#modparam("usrloc", "use_domain", MULTIDOMAIN)
#!endif


# ----- auth_db params -----
#!ifdef WITH_AUTH
modparam("auth_db", "db_url", "mysql://root:root@127.0.0.1:3306/kamailio")
modparam("auth_db", "calculate_ha1", yes)
modparam("auth_db", "password_column", "password")
modparam("auth_db", "load_credentials", "")
#modparam("auth_db", "use_domain", MULTIDOMAIN)

# ----- permissions params -----
#!ifdef WITH_IPAUTH
#modparam("permissions", "db_url", DBURL)
#modparam("permissions", "db_mode", 1)
#!endif

#!endif


# ----- alias_db params -----
#!ifdef WITH_ALIASDB
modparam("alias_db", "db_url", "mysql://root:root@127.0.0.1:3306/kamailio")
#modparam("alias_db", "use_domain", MULTIDOMAIN)
#!endif


# ----- speeddial params -----
#!ifdef WITH_SPEEDDIAL
modparam("speeddial", "db_url", DBURL)
modparam("speeddial", "use_domain", MULTIDOMAIN)
#!endif


# ----- domain params -----
#!ifdef WITH_MULTIDOMAIN
modparam("domain", "db_url", DBURL)
# register callback to match myself condition with domains list
modparam("domain", "register_myself", 1)
#!endif


#!ifdef WITH_PRESENCE
# ----- presence params -----
modparam("presence", "db_url", DBURL)

# ----- presence_xml params -----
modparam("presence_xml", "db_url", DBURL)
modparam("presence_xml", "force_active", 1)
#!endif


#!ifdef WITH_NAT
# ----- rtpproxy params -----
modparam("rtpproxy", "rtpproxy_sock","udp:127.0.0.1:2221")
#modparam("rtpproxy", "rtpproxy_sock","2 == udp:127.0.0.1:2223")
#modparam("rtpproxy", "rtpproxy_sock", "unix:/var/run/rtpproxy/rtpproxy.sock")
#modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:2221")
#modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:2222")
modparam("rtpproxy", "rtpproxy_tout", 2)
modparam("rtpproxy", "rtpproxy_retr", 3)
modparam("rtpproxy", "nortpproxy_str", "")
#modparam("rtpproxy", "timeout_socket", "tcp:127.0.0.1:2221 tcp:127.0.0.1:2222 tcp:127.0.0.1:2223")
# ----- nathelper params -----
modparam("nathelper", "natping_interval",3600)
#modparam("nathelper", "ping_nated_only", 1)
#modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)
#modparam("nathelper", "sipping_from", "sip:pinger@kamailio.org")

# params needed for NAT traversal in other modules
modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)")
modparam("usrloc", "nat_bflag", FLB_NATB)
#!endif


#!ifdef WITH_TLS
# ----- tls params -----

modparam("tls", "config", "/usr/local/kamailio-4.3/etc/kamailio/tls.cfg")
#!endif

#!ifdef WITH_ANTIFLOOD
# ----- pike params -----
modparam("pike", "sampling_time_unit", 2)
modparam("pike", "reqs_density_per_unit", 16)
modparam("pike", "remove_latency", 4)

# ----- htable params -----
# ip ban htable with autoexpire after 5 minutes
modparam("htable", "htable", "ipban=>size=8;autoexpire=300;")
#!endif

#!ifdef WITH_XMLRPC
# ----- xmlrpc params -----
modparam("xmlrpc", "route", "XMLRPC");
modparam("xmlrpc", "url_match", "^/RPC")
#!endif

#!ifdef WITH_DEBUG
# ----- debugger params -----
modparam("debugger", "cfgtrace", 1)
modparam("debugger", "log_level_name", "exec")
#!endif

####### Routing Logic ########


# Main SIP request routing logic
# - processing of any incoming SIP request starts with this route
# - note: this is the same as route { ... }
route {


xlog("DialogRoutes starte'$fd,$avp(i:101)");
avp_db_query("select enabled from Dest_GW_Routing where ingress_domain='$fd'","$avp(i:101)");

if ($avp(i:101)=="1") {

xlog("DialogRoutes started==$DLG_status=======has_totag()\n");
        avp_db_query("select egress_ruri, Secure_IP, Secure_Port from GW_Routing where ingress_domain='$fd'","$avp(i:102);$avp(i:106);$avp(i:107)");
        $var(UAS_URI)= $avp(i:102);
        remove_hf("Record-Route");
        remove_hf("Contact");
        append_hf("Contact: <sip:$fU@$avp(i:106):$avp(i:107)>\r\n");
        remove_hf("User-Agent");
        append_hf("User-Agent: Vp Dialer 11\r\n");
        if (!mf_process_maxfwd_header("10")) {
                sl_send_reply("483","Too Many Hops");
                exit;
        }
        if (has_totag()) {
        xlog("===STAG==1====$DLG_status");
        loose_route();
                         xlog("DialogPrintooo: BLOGS");
                        if(is_known_dlg()) {
                                xlog("DialogPrintSTATUUUo: $DLG_status");
                                 xlog("Dialog NULL");
                                record_route();

                        if (is_method("BYE")) {
                         xlog("DialogPrintooo: BYE");
                                remove_hf("User-Agent");
                                t_relay();
                        }
                        else if (is_method("INVITE")) {
                         xlog("DialogPrintooo: INVITE");
                                record_route();
                                route(RELAY);
                        }
                        else {
                         xlog("DialogPrintooo: LEVEL");
                                route(RELAY);
                        }
                }
                else {
                        if ( is_method("ACK")) {
                                remove_hf("Route");
                                if ( t_check_trans() ) {
                                        t_relay();
                                        exit;
                                }
                                else {
                                        exit;
                                }
                        }
                        sl_send_reply("404","Not here");
                }
                exit;
        }
        xlog("===STAG==2====$DLG_status");
        if (is_method("BYE") && $DLG_status < 3) {
                sl_send_reply("501", "Method Not Supported Here");
        }

        if (is_method("CANCEL")) {
                if (t_check_trans()) {
                        t_relay();
                }
                exit;
        }

        t_check_trans();

        if (!(is_method("REGISTER"))) {
                record_route();
                route(RELAY);
        }
        if (loose_route()) {
                if (!is_method("ACK"))
                        sl_send_reply("403","Preload Route denied");
                        exit;
        }
        #&
        if (is_method("INVITE")) {
                #if ( !create_dialog("B") ) {
                 #       send_reply("500","Internal Server Error");
                 #       exit;
               # }

           if(!is_known_dlg()) {
                        xlog("Request $rm from $ci is in-dialog\n");
                        send_reply("500","Internal Server Error");
                }
        }
        if (is_method("PUBLISH|SUBSCRIBE|MESSAGE"))
        {
                sl_send_reply("503","Method Not Allowed");
                exit;
        }
        if (is_method("REGISTER"))
        {
                route(RELAY);
#               save("location");
                exit;
        }
        if ($rU==$null) {
                sl_send_reply("484","Address Incomplete");
                exit;
        }
        route(RELAY);
}
 else {
        sl_send_reply("503","Access Denied");
        exit;
 }
}

        # per request initial checks
#       route(REQINIT);

        # NAT detection
#       route(NATDETECT);

        # CANCEL processing
        #if (is_method("CANCEL")) {
        #       if (t_check_trans()) {
        #               route(RELAY);
        #       }
        #       exit;
        #}

        # handle requests within SIP dialogs
        #route(WITHINDLG);

        ### only initial requests (no To tag)

        # handle retransmissions
        #if(t_precheck_trans()) {
        #       t_check_trans();
        #       exit;
        #}
        #t_check_trans();

        # authentication
#       route(AUTH);

        # record routing for dialog forming requests (in case they are routed)
        # - remove preloaded route headers
#       remove_hf("Route");
#       if (is_method("INVITE|SUBSCRIBE"))
#               record_route();

        # account only INVITEs
#       if (is_method("INVITE")) {
#               setflag(FLT_ACC); # do accounting
#       }

        # dispatch requests to foreign domains
#       route(SIPOUT);

        ### requests for my local domains

        # handle presence related requests
#       route(PRESENCE);

        # handle registrations
#       route(REGISTRAR);

#       if ($rU==$null) {
                # request with no Username in RURI
#               sl_send_reply("484","Address Incomplete");
#               exit;
#       }

        # dispatch destinations to PSTN
#       route(PSTN);

        # user location service
#       route(LOCATION);
#}

# Wrapper for relaying requests
route[RELAY] {

        remove_hf("Route");
        $var(UAS_URI)= $avp(i:102);
        $du = $var(UAS_URI);
        if (is_method("INVITE")) {
                if($rm=="INVITE") {
                        avp_db_query("select track_status from IP_Tracker where track_username='$fU'","$avp(i:121)");
#                        if($avp(i:121)==1) {
#                                avp_db_query("insert into IP_Track_CDR (caller,called,source_ip) values ('$fU','$tU','$si')");

                        avp_db_query("select active, license from Dest_GW_Routing where ingress_domain='$fd'","$avp(active);$avp(i:116)");
                        if($avp(active)>=$avp(i:116)) {
                                xlog("Active Calls Limit Reached for $fd, Dropping Call");
                                sl_send_reply("503", "Max call limit reached");
                                exit;
                        }
                        if($rU=~"\+[0-9]") {
                                strip(1);
                                if(!has_totag()) {
                                        remove_hf("To");
                                        append_hf("To:<sip:$rU@$fd>\r\n");
                                }
                        }
                }
                remove_hf("User-Agent");
                remove_hf("Route");
#                fix_nated_contact();
                force_rport();
                t_on_reply("NAT_HANDLE");
                t_on_failure("MANAGE_FAILURE");
                if (has_body("application/sdp")) {
                        replace_body("s=.*", "s= Vp Dialer\r");
                        replace_body_all("a=rtcp.*\n", "");
#                       codec_delete("speex");
#                       codec_delete("opus");
#                       codec_delete("telephone-event","16000");
#                       codec_delete("telephone-event","48000");
#                       codec_delete("pcmu");
#                       codec_delete("pcma");
                        rtpproxy_offer("coz20");
                }
        }
        if (is_method("BYE") || is_method("CANCEL")) {
                #rtpproxy_unforce();
                unforce_rtp_proxy();
        }
        if (!t_relay()) {
                send_reply("500","Server Internal Error");
        };
        exit;
}

route[RELAY_2] {
        $var(UAS_URI)= $avp(i:102);
        if (!is_method("INVITE")) {
                return;
        }
        if ($rU=~"^\*") {
                $du = $var(UAS_URI);
                route(RELAY);
         }
}

onreply_route[NAT_HANDLE] {
  avp_db_query("select Secure_Domain, ingress_sig_port, ingress_transport from Dest_GW_Routing where ingress_domain='$fd'","$avp(i:103);$avp(i:104);$avp(i:105)");
        $var(NAS_Domain)= $avp(i:103);
        $var(NAS_Port)= $avp(i:104);
        $var(NAS_Transport)= $avp(i:105);
        force_rport();
#        fix_nated_contact();
#        record_route();
        remove_hf("Record-Route");
        remove_hf("Contact");
        append_hf("Contact: <sip:$fU@$var(NAS_Domain):$var(NAS_Port);transport=$var(NAS_Transport)>\r\n");
        if (is_method("REGISTER")) {
        remove_hf("Contact");
        append_hf("Contact: <sip:$fU@$var(NAS_Domain):$var(NAS_Port);transport=$var(NAS_Transport);expires=300>\r\n");
        }
        if (t_check_status("200") && has_body("application/sdp")) {
                rtpproxy_answer("z100");
                if(search_body("a=ptime:.*") && !search_body("a=ptime:100")) {
                        replace_body("a=ptime:.*", "a=ptime:100\r");
                }
                else if(!search_body("a=ptime:.*")) {
                        search_append_body("a=fmtp:18.*", "\na=ptime:100\r");
                }
                if(search_body("a=maxptime:.*")) {
                        replace_body("a=maxptime:.*", "a=maxptime:100\r");
                }
        }

        if (is_method("BYE") || is_method("CANCEL")) {
                #rtpproxy_unforce();
                unforce_rtp_proxy();
        }
        if (t_check_status("183") && has_body("application/sdp")) {
                if(search_body("a=ptime:.*") && !search_body("a=ptime:100")) {
                        replace_body("a=ptime:.*", "a=ptime:100\r");
                }
                else if(!search_body("a=ptime:.*")) {
                        search_append_body("a=fmtp:18.*", "\na=ptime:100\r");
                }
                if(search_body("a=maxptime:.*")) {
                        replace_body("a=maxptime:.*", "a=maxptime:100\r");
                }
                rtpproxy_offer("coz100");
        }
        if (t_check_status("180") && has_body("application/sdp")) {
                if(search_body("a=ptime:.*") && !search_body("a=ptime:100")) {
                        replace_body("a=ptime:.*", "a=ptime:100\r");
                }
                else if(!search_body("a=ptime:.*")) {
                        search_append_body("a=fmtp:18.*", "\na=ptime:100\r");
                }
                if(search_body("a=maxptime:.*")) {
                        replace_body("a=maxptime:.*", "a=maxptime:100\r");
                }
                rtpproxy_offer("coz100");
        }
}






        # enable additional event routes for forwarded requests
        # - serial forking, RTP relaying handling, a.s.o.
        #if (is_method("INVITE|BYE|SUBSCRIBE|UPDATE")) {
        #       if(!t_is_set("branch_route")) t_on_branch("MANAGE_BRANCH");
        #}
        #if (is_method("INVITE|SUBSCRIBE|UPDATE")) {
        #       if(!t_is_set("onreply_route")) t_on_reply("MANAGE_REPLY");
        #}
        #if (is_method("INVITE")) {
        #       if(!t_is_set("failure_route")) t_on_failure("MANAGE_FAILURE");
        #}

        #if (!t_relay()) {
        #       sl_reply_error();
        #}
        #exit;
#}

# Per SIP request initial checks
route[REQINIT] {
#!ifdef WITH_ANTIFLOOD
        # flood detection from same IP and traffic ban for a while
        # be sure you exclude checking trusted peers, such as pstn gateways
        # - local host excluded (e.g., loop to self)
        if(src_ip!=myself) {
                if($sht(ipban=>$si)!=$null) {
                        # ip is already blocked
                        xdbg("request from blocked IP - $rm from $fu (IP:$si:$sp)\n");
                        exit;
                }
                if (!pike_check_req()) {
                        xlog("L_ALERT","ALERT: pike blocking $rm from $fu (IP:$si:$sp)\n");
                        $sht(ipban=>$si) = 1;
                        exit;
                }
        }
        if($ua =~ "friendly-scanner") {
                sl_send_reply("200", "OK");
                exit;
        }
#!endif

        if (!mf_process_maxfwd_header("10")) {
                sl_send_reply("483","Too Many Hops");
                exit;
        }

        if(is_method("OPTIONS") && uri==myself && $rU==$null) {
                sl_send_reply("200","Keepalive");
                exit;
        }

        if(!sanity_check("1511", "7")) {
                xlog("Malformed SIP message from $si:$sp\n");
                exit;
        }
}

# Handle requests within SIP dialogs
route[WITHINDLG] {
         xlog("===STAG==111=$DLG_status");
        if (!has_totag()) return;

         xlog("===STAG==112=$DLG_status");
        # sequential request withing a dialog should
        # take the path determined by record-routing
        if (loose_route()) {
         xlog("===STAG==113=$DLG_status");
                route(DLGURI);
                if (is_method("BYE")) {
                        setflag(FLT_ACC); # do accounting ...
                        setflag(FLT_ACCFAILED); # ... even if the transaction fails
                }
                else if ( is_method("ACK") ) {
                        # ACK is forwarded statelessy
                        route(NATMANAGE);
                }
                else if ( is_method("NOTIFY") ) {
                        # Add Record-Route for in-dialog NOTIFY as per RFC 6665.
                        record_route();
                }
                route(RELAY);
                exit;
        }

        if (is_method("SUBSCRIBE") && uri == myself) {
                # in-dialog subscribe requests
                route(PRESENCE);
                exit;
        }
        if ( is_method("ACK") ) {
                if ( t_check_trans() ) {
                        # no loose-route, but stateful ACK;
                        # must be an ACK after a 487
                        # or e.g. 404 from upstream server
                        route(RELAY);
                        exit;
                } else {
                        # ACK without matching transaction ... ignore and discard
                        exit;
                }
        }
        sl_send_reply("404","Not here");
        exit;
}

# Handle SIP registrations
route[REGISTRAR] {
        if (!is_method("REGISTER")) return;

        if(isflagset(FLT_NATS)) {
                setbflag(FLB_NATB);
#!ifdef WITH_NATSIPPING
                # do SIP NAT pinging
                setbflag(FLB_NATSIPPING);
#!endif
        }
        if (!save("location"))
                sl_reply_error();
        exit;
}

# User location service
route[LOCATION] {

#!ifdef WITH_SPEEDDIAL
        # search for short dialing - 2-digit extension
        if($rU=~"^[0-9][0-9]$")
                if(sd_lookup("speed_dial"))
                        route(SIPOUT);
#!endif

#!ifdef WITH_ALIASDB
        # search in DB-based aliases
        if(alias_db_lookup("dbaliases"))
                route(SIPOUT);
#!endif

        $avp(oexten) = $rU;
        if (!lookup("location")) {
                $var(rc) = $rc;
                route(TOVOICEMAIL);
                t_newtran();
                switch ($var(rc)) {
                        case -1:
                        case -3:
                                send_reply("404", "Not Found");
                                exit;
                        case -2:
                                send_reply("405", "Method Not Allowed");
                                exit;
                }
        }

        # when routing via usrloc, log the missed calls also
        if (is_method("INVITE")) {
                setflag(FLT_ACCMISSED);
        }

        route(RELAY);
        exit;
}

# Presence server processing
route[PRESENCE] {
        if(!is_method("PUBLISH|SUBSCRIBE"))
                return;

        if(is_method("SUBSCRIBE") && $hdr(Event)=="message-summary") {
                route(TOVOICEMAIL);
                # returns here if no voicemail server is configured
                sl_send_reply("404", "No voicemail service");
                exit;
        }

#!ifdef WITH_PRESENCE
        if (!t_newtran()) {
                sl_reply_error();
                exit;
        }

        if(is_method("PUBLISH")) {
                handle_publish();
                t_release();
        } else if(is_method("SUBSCRIBE")) {
                handle_subscribe();
                t_release();
        }
        exit;
#!endif

        # if presence enabled, this part will not be executed
        if (is_method("PUBLISH") || $rU==$null) {
                sl_send_reply("404", "Not here");
                exit;
        }
        return;
}

# IP authorization and user authentication
route[AUTH] {
#!ifdef WITH_AUTH

#!ifdef WITH_IPAUTH
        if((!is_method("REGISTER")) && allow_source_address()) {
                # source IP allowed
                return;
        }
#!endif

        if (is_method("REGISTER") || from_uri==myself)
        {
                # authenticate requests
                if (!auth_check("$fd", "subscriber", "1")) {
                        auth_challenge("$fd", "0");
                        exit;
                }
                # user authenticated - remove auth header
                if(!is_method("REGISTER|PUBLISH"))
                        consume_credentials();
        }
        # if caller is not local subscriber, then check if it calls
        # a local destination, otherwise deny, not an open relay here
        if (from_uri!=myself && uri!=myself) {
                sl_send_reply("403","Not relaying");
                exit;
        }

#!endif
        return;
}

# Caller NAT detection
route[NATDETECT] {
#!ifdef WITH_NAT
        force_rport();
        if (nat_uac_test("19")) {
                if (is_method("REGISTER")) {
                        fix_nated_register();
                } else {
                        if(is_first_hop())
                                set_contact_alias();
                }
                setflag(FLT_NATS);
        }
#!endif
        return;
}

# RTPProxy control and signaling updates for NAT traversal
route[NATMANAGE] {
#!ifdef WITH_NAT
        if (is_request()) {
                if(has_totag()) {
                        if(check_route_param("nat=yes")) {
                                setbflag(FLB_NATB);
                        }
                }
        }
        if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB)))
                return;

        if(nat_uac_test("8")) {
                rtpproxy_manage("co");
        } else {
                rtpproxy_manage("cor");
        }

        if (is_request()) {
                if (!has_totag()) {
                        if(t_is_branch_route()) {
                                add_rr_param(";nat=yes");
                        }
                }
        }
        if (is_reply()) {
                if(isbflagset(FLB_NATB)) {
                        if(is_first_hop())
                                set_contact_alias();
                }
        }
#!endif
        return;
}

# URI update for dialog requests
route[DLGURI] {
#!ifdef WITH_NAT
        if(!isdsturiset()) {
                handle_ruri_alias();
        }
#!endif
        return;
}

# Routing to foreign domains
route[SIPOUT] {
        if (uri==myself) return;

        append_hf("P-hint: outbound\r\n");
        route(RELAY);
        exit;
}

# PSTN GW routing
route[PSTN] {
#!ifdef WITH_PSTN
        # check if PSTN GW IP is defined
        if (strempty($sel(cfg_get.pstn.gw_ip))) {
                xlog("SCRIPT: PSTN routing enabled but pstn.gw_ip not defined\n");
                return;
        }

        # route to PSTN dialed numbers starting with '+' or '00'
        #     (international format)
        # - update the condition to match your dialing rules for PSTN routing
        if(!($rU=~"^(\+|00)[1-9][0-9]{3,20}$"))
                return;

        # only local users allowed to call
        if(from_uri!=myself) {
                sl_send_reply("403", "Not Allowed");
                exit;
        }

        if (strempty($sel(cfg_get.pstn.gw_port))) {
                $ru = "sip:" + $rU + "@" + $sel(cfg_get.pstn.gw_ip);
        } else {
                $ru = "sip:" + $rU + "@" + $sel(cfg_get.pstn.gw_ip) + ":"
                                        + $sel(cfg_get.pstn.gw_port);
        }

        route(RELAY);
        exit;
#!endif

        return;
}

# XMLRPC routing
#!ifdef WITH_XMLRPC
route[XMLRPC] {
        # allow XMLRPC from localhost
        if ((method=="POST" || method=="GET")
                        && (src_ip==127.0.0.1)) {
                # close connection only for xmlrpclib user agents (there is a bug in
                # xmlrpclib: it waits for EOF before interpreting the response).
                if ($hdr(User-Agent) =~ "xmlrpclib")
                        set_reply_close();
                set_reply_no_connect();
                dispatch_rpc();
                exit;
        }
        send_reply("403", "Forbidden");
        exit;
}
#!endif

# Routing to voicemail server
route[TOVOICEMAIL] {
#!ifdef WITH_VOICEMAIL
        if(!is_method("INVITE|SUBSCRIBE"))
                return;

        # check if VoiceMail server IP is defined
        if (strempty($sel(cfg_get.voicemail.srv_ip))) {
                xlog("SCRIPT: VoiceMail routing enabled but IP not defined\n");
                return;
        }
        if(is_method("INVITE")) {
                if($avp(oexten)==$null)
                        return;
                $ru = "sip:" + $avp(oexten) + "@" + $sel(cfg_get.voicemail.srv_ip)
                                + ":" + $sel(cfg_get.voicemail.srv_port);
        } else {
                if($rU==$null)
                        return;
                $ru = "sip:" + $rU + "@" + $sel(cfg_get.voicemail.srv_ip)
                                + ":" + $sel(cfg_get.voicemail.srv_port);
        }
        route(RELAY);
        exit;
#!endif

        return;
}

# Manage outgoing branches
branch_route[MANAGE_BRANCH] {
        xdbg("new branch [$T_branch_idx] to $ru\n");
        route(NATMANAGE);
}

# Manage incoming replies
#onreply_route[MANAGE_REPLY] {
#       xdbg("incoming reply\n");
#       if(status=~"[12][0-9][0-9]")
#               route(NATMANAGE);
#}

# Manage failure routing cases

# Manage failure routing cases
failure_route[MANAGE_FAILURE] {
        route(NATMANAGE);

        if (t_is_canceled()) {
                exit;
        }

#!ifdef WITH_BLOCK3XX
        # block call redirect based on 3xx replies.
        if (t_check_status("486")) {
                #t_reply("404","Not found");
                send_reply("486","Destination Number is busy, Please try again later.");
                exit;
        }
#!endif

#!ifdef WITH_VOICEMAIL
        # serial forking
        # - route to voicemail on busy or no answer (timeout)
        if (t_check_status("487|408")) {
                #route(TOVOICEMAIL);
                send_reply("487","Destination Number is Temporarly Unavailable, Please try again later.");
                exit;
        }
#!endif
}
#local_route {
 #       if (is_method("BYE") && $DLG_dir=="UPSTREAM") {
  #      }
#}


Regards
AmanIdo