[SR-Users] [mohqueue] MOH service / A case with MOH queue

[Issam Hambouz]

Hello!

I am exploring mohqueue module and have few questions:

- Could it be used to provide MOH service for SIP endpoints? I am aware
that its main functionality is to queue calls (along playing a MOH for
queued calls) and provides a mechanism to retrieve calls (FIFO), but I had
the impression, reading several emails in this group, that it can be used
in a way to provide MOH whenever a call is put on-hold
-- I tried to use it with the re-INVITE received when a call is put
on-hold, but got a log message stating that it works with initial INVITEs
only (something like that)

- On a test setup (Kamailio 4.2.3 / 2.0.0), I was able to reach the queue /
listen to the MOH but encountered a strange case where the call gets
automatically removed from the queue after 4-5 seconds (can be seen removed
from kamailio.mohqcalls as well)

Jun 12 22:58:30 - DEBUG: mohqueue [mohq_funcs.c:2369]: mohq_debug():
mohq_process: Processing INVITE, queue (demo)
Jun 12 22:58:30 - DEBUG: mohqueue [mohq_funcs.c:2369]: mohq_debug():
create_call: Added call
(<sip:6010 at 10.110.3.57>;tag=c97a6b26-2bfe-4271-9db1-cee38ea96c47)
to queue (demo)
Jun 12 22:58:30 - DEBUG: mohqueue [mohq_funcs.c:2369]: mohq_debug():
first_invite_msg: Making offer for RTP link for call (<sip:6010 at 10.110.3.57
>;tag=c97a6b26-2bfe-4271-9db1-cee38ea96c47)
Jun 12 22:58:30 - DEBUG: mohqueue [mohq_funcs.c:2369]: mohq_debug():
first_invite_msg: Sent RINGING for call (<sip:6010 at 10.110.3.57
>;tag=c97a6b26-2bfe-4271-9db1-cee38ea96c47)
Jun 12 22:58:30 - DEBUG: mohqueue [mohq_funcs.c:2369]: mohq_debug():
send_rtp_answer: Answering RTP link for call (<sip:6010 at 10.110.3.57
>;tag=c97a6b26-2bfe-4271-9db1-cee38ea96c47)
Jun 12 22:58:30 - DEBUG: mohqueue [mohq_funcs.c:2369]: mohq_debug():
start_stream: Starting RTP link for call (<sip:6010 at 10.110.3.57
>;tag=c97a6b26-2bfe-4271-9db1-cee38ea96c47)
Jun 12 22:58:30 - DEBUG: mohqueue [mohq_funcs.c:2369]: mohq_debug():
send_rtp_answer: Responded to INVITE with RTP for call (<
sip:6010 at 10.110.3.57>;tag=c97a6b26-2bfe-4271-9db1-cee38ea96c47)
Jun 12 22:58:35 ERROR: mohqueue [mohq_funcs.c:1243]: invite_cb():
invite_cb: INVITE failed for call (<sip:6010 at 10.110.3.57
>;tag=c97a6b26-2bfe-4271-9db1-cee38ea96c47)!
Jun 12 22:58:35 DEBUG: mohqueue [mohq_funcs.c:2369]: mohq_debug():
delete_call: Deleting call
(<sip:6010 at 10.110.3.57>;tag=c97a6b26-2bfe-4271-9db1-cee38ea96c47)
from queue (demo)

-- route[MOH] is called first at the beginning of request_route()
route[MOH] {
  if (has_totag()) return;
  if (mohq_process ()) {
    xlog ("mohqueue: mohq_process");
    exit;
  }
}

-- Looking at the SIP trace, all seems ok, except receiving a 404 response
after BYE (that's me hanging up after few seconds from getting the above
error message)

Your comments and hints are appreciated!

Thank you
Issam
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