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

[Robert Boisvert]

Issam,

mohqueue was designed to provide a way for unanswered calls to a call
center or answer group to be dropped into a holding queue until it could be
processed.  While in queue an audio recording would be played for the
caller and when a line was open to receive calls it could be directed out
of the FIFO queue.  It was not designed to put a call on hold, although
that could be a future enhancement.

With regard to the error you identified, it appears that the INVITE did not
complete.  You might want to do a SIP trace and look at requests and
responses to try to identify why the call failed.

Hope this helps,
Bob

On Mon, Jun 12, 2017 at 4:25 PM, Issam Hambouz <ihambouz at gmail.com> wrote:

> 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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