Hi All,

I'm having some issues trying to properly send a '302 Moved Temporarily' reply to the calling UAC (UAC1) when the remote UAC (UAC2) returns a 486 status (Do Not Disturb). The goal is to redirect UAC1 to a voicemail server when UAC2 is in DND.

Here are the pertinent parts of my config:

route {
# drop some things right away
route(DROP);

# perform sanity check
route(SANITYCHECK);

# handle registrations
if(is_method("REGISTER")) {
route(REGISTRATION);
exit;
}

# handle invites
if(is_method("INVITE")) {
route("INVITE");
exit;
}

route(RELAY);
}

route[INVITE] {
# add this proxy to the record-route so it stays in the loop
record_route();

# if we can find this user in the location DB...
if(lookup("location")) {
# relay the invite to the new dURI
t_on_failure("FOURDIGITFAIL");
t_on_reply("FOURDIGITREPLY");
route(RELAY);
# go back to the main route
return;
}

onreply_route[FOURDIGITREPLY] {
if(t_check_status("4[0-9]{2}")) {

t_reply("302", "Moved Temporarily");
}
}

I'm having issues with the t_reply in the onreply_route. It successfully sends the reply, but I can't seem to set the Contact header properly. I'm trying to set it to the location of the user's mailbox on the voicemail sever (ie sip:1000@vmpbx.domain.com), but nothing I try works. I've tried:

remove_hf("Contact");
insert_hf("Contact: sip:1000@vmpbx.domain.com");

t_reply("302", "Moved Temporarily");

But as I understand it, that just changes the header in the reply from UAC2, not the reply I'm sending to UAC1

Then I tried:

append_to_reply("Contact: sip:1000@vmpbx.domain.com" );

t_reply("302", "Moved Temporarily");

But I can't use append_to_reply in an onreply block.

How can I change the Contact header in the reply that's sent? Am I just going about this the wrong way? Any help would be appreciated. Thanks