17 Dec
2018
17 Dec
'18
2:02 a.m.
Hi list,
I'm trying to play an announcement for my users when my PSTN gateway responds with a
404 Not Found (Reason: Q.850;cause=3), indicating a wrong number. I'm a bit lost and
would appreciate any advice.
What I am seeing is two parallel SIP invites, one to my announcement server (hooray!) and
one to the PSTN gateway again (which I don't want). How do I stop the original branch
from starting again?
I've tried changing the order of rewritehostport and append_branch without any
difference. I've also tried to use t_relay() instead of the RELAY route.
I'm using Kamailio 5.1 and have modified the deafult kamailio.cfg
Thanks!
Boden
I think this is the relevant parts of the config:
# PSTN GW routing
route[PSTN] {
[PSTN regex logic omitted]
# classify as an outbound call
set_dlg_profile("outbound_calls");
# select a PSTN gateway from the dispatcher
if (!ds_select_dst("66", "8")) {
send_reply("404", "No destination");
exit;
}
# failover if the selected PSTN gateway is down
t_on_failure("RTF_DISPATCH");
route(RELAY);
exit;
}
# Try next destinations in failure route
failure_route[RTF_DISPATCH] {
xlog("inside RTF_DISPATCH");
if (t_is_canceled()) {
exit;
}
# wrong number from PSTN
if (t_check_status("404")) {
append_branch();
append_hf("X-Application: announcement\r\n");
append_hf("X-Announcement-Playback: wrong-number\r\n");
route(TO_ANNOUNCEMENT);
exit;
}
# next DST - only for 500 or local timeout
if (t_check_status("500") or (t_branch_timeout() and !t_branch_replied())) {
xlog("selecting next destination");
if (ds_next_dst()) {
t_on_failure("RTF_DISPATCH");
route(RELAY);
exit;
}
}
}
# Routing to announcement server
route[TO_ANNOUNCEMENT] {
if (!is_method("INVITE")) {
return;
}
rewritehostport('ANNOUNCEMENT_SERVER:5060');
route(RELAY);
exit;
}