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 - 23:20:02 ART