RE: MOH on Cisco phone 7941

Tortle,

        You hear tone on hold vs music on hold in this case. There can be
many issues that lead to this, including the mismatch between the MOH codec
and its region codec, location based CAC that prevents MOH stream and sends
TOH instead, etc.

        I think you have a configuration issue, for which the lab was
specifically crafted.

        I am not familiar with these labs and couldn't provide you any lab
specific valuable input. The INE folks might help you in this case - most
likely they already know what you did wrong.

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: Wednesday, April 07, 2010 6:20 AM
To: adel_at_netmasterclass.net; ccielab_at_groupstudy.com
Subject: RE: MOH on Cisco phone 7941

Hi Adel

   Your infomation is very useful.

   It is multicast.

   Actually, I was doing internetwork voice lab1, the phones are in the same
site HQ. When I run debug on the R1 and press the hold button, I only can
hear
" du du............du du.............." on 7941,I didn't see any pkts.
Howerver I can hear the music on 7960, but still not mutlicast pkts come
through R1. I also tested on different site, same result.

I checked the pim config, it is ok.

How can I hear the music on 7960, but not multicast pkts on R1 ? I have to
sort it out.

debug ip packet 110
access-list 110 permit tcp any host 239.1.1.1 eq 16384
access-list 110 permit tcp any host 239.1.1.2 eq 16384

Thanks,

> From: adel_at_netmasterclass.net
> To: ccielab_at_groupstudy.com
> Subject: RE: MOH on Cisco phone 7941
> Date: Tue, 6 Apr 2010 19:45:35 -0700
>
> 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 Wed Apr 07 2010 - 09:17:56 ART