RE: MOH on Cisco phone 7941

Is your MOH multicast or unicast?

                If it is multicast, could you check if you gave (S,G) entry
in the multicast routing table?

                In both cases, unicast or multicast, when you connect your
browser to the phone and see Stream Information, do you see byte counters
increasing proportionally with the time?

                Do you hear tone on hold by any chance?

                What is the situation - how many regions you have and how
are phones and MOH servers dislocated in these regions? Any restrictions
between these regions that could come into play? It seems that your phones
are in different sites. If you swap the phones between sites, put them into
each other VLANs, which will also swap their device pools, does it change
anything?

                If it is your pod, could you monitor the traffic towards the
phone and see if RTP is streaming into it? If not - interface counters might
help to determine the number of bytes per period of time sent to the phone.
Voice will increase them consistently with constant speed, and the number
will depend on the codec.

                If you are using MTP or a transcoder - are they properly
registered?

                These are shortly a few steps that I would take to
troubleshoot the MOH. They do not guarantee to find the issue as more closer
look to the configuration and running few other more specifically targeted
tests might be necessary.

Cheers,

Adel Abouchaev, CCIE# 12037, CISSP, MCSE

Technical Support Engineer

Netmasterclass LLC, Cisco Learning Partner

RFC821: adel_at_netmasterclass.net

E.164: +18886772669

HTTP: www.netmasterclass.net

From: Tortle Tang [mailto:tortletang_at_hotmail.com]
Sent: Tuesday, April 06, 2010 5:12 PM
To: adel_at_netmasterclass.net; ccielab_at_groupstudy.com
Subject: RE: MOH on Cisco phone 7941

Hi Adel

    Thanks your reply.
    My phones are SIP phones. And the Audio source is the default one
"SampleAudioSource" which should support g.711u and g.729.
    The receiver 7961 can hear the MOH stream when I press the button on
7941 or 7961. If the receiver is 7941, it couldn't hear the MOH.
     I am still thinking maybe something to do with the configuration on the
CCM or transcoder on the voice gateway, not sure.

Many Thanks,
Tortle

> From: adel_at_netmasterclass.net
> To: tortletang_at_hotmail.com; ccielab_at_groupstudy.com
> Subject: RE: MOH on Cisco phone 7941
> Date: Tue, 6 Apr 2010 11:47:12 -0700
>
> MOH is generated by the media resources, not by the phone, so it seems
that
> 7941 is not playing it and 7961 is playing it well. What is the codec that
> is used to generate MOH stream? When you place 7961 on hold and hear the
> MOH, hit ?? and see what the codec is. 7941 will only support g.711u and
> g.729.
>
> The other issue might be a multicast routing, and there is not enough
> information to calculate the answer.
>
> Also, is it a SCCP or a SIP phone (7941) ? The SIP load will not support
> G.729 annex B. For that a hardware transcoder is required to support G.729
> annex B out the H.323 trunk.
>
> Cheers,
>
> Adel Abouchaev, CCIE# 12037, CISSP, MCSE
>
> Technical Support Engineer
> Netmasterclass LLC, Cisco Learning Partner
> RFC821: adel_at_netmasterclass.net
> E.164: +18886772669
> HTTP: www.netmasterclass.net
>
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Tortle Tang
> Sent: Tuesday, April 06, 2010 6:03 AM
> To: ccielab_at_groupstudy.com
> Subject: MOH on Cisco phone 7941
>
> Hi Guys
>
>
>
> I was configuring the lab for media resources at CUCM 7. One thing make
> me
> frustrating is MOH didn't work at Cisco7941,but did work at Cisco7960.
>
> When I press "hold" button, MOH on 7941->7960 was working, 7941->7941
> not
> working, 7961->7941 not working, 7961->7961 was working. Device pool and
> MGRL
> are the same. Any idea ?
>
>
>
>
>
> Many Thanks,
>
> Tortle
>
>
>
>
>
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Received on Tue Apr 06 2010 - 19:45:35 ART