[cisco-voip] Music On Hold Problem

[Chris Ward]

Hi Wilson,

I see you have both dial-peers and some MGCP commands on the GW. Is this
H323 or MGCP?

I have seen some talk in the thread about the IP PIM commands already but
let me just run through the steps we normally use to fix 90% of these
issues:

1) Ensure the hop count in CCM for the MOH server is enough to cross all the
L3 barriers between the CUCM and this GW.

2) Ensure you have "ip multicast routing" enabled on all the routers this
MMOH stream is going to cross

3) Ensure you have "ip pim sparse-dense-mode" on the ingress and egress
interfaces this stream is going to cross going through the L3 hops.

For troubleshooting, call in from the PSTN and have the IP phone place the
call on hold. Then, use the "show ip mroute" command to see the if the
multicast stream is being properly routed. The output will include the
source and destination IP of the multicast stream, so ensure you are looking
at the entry with your CUCM's IP and the proper multicast dest address. Some
entries will not have any source IP info, these are not your MMOH stream.
The command also shows the interfaces that the stream is being received and
sent out on so if you see an ingress interface and no egress, that router is
most likely the issue.

HTH

Chris Ward 

> From: Timothy Smith <timotsmith at gmail.com>
> Date: Mon, 8 Dec 2008 20:18:26 +0300
> To: Chris Ward <chrward at cisco.com>
> Cc: <cisco-voip at puck.nether.net>
> Subject: Re: [cisco-voip] Music On Hold Problem
> 
> Hi Chris,
> 
> Thanks for your reply. This is not a dupe.
> 
> The previous emails have helped me overcome the tone on hold only for
> some internal calls (calls within the call manager to local
> extensions). My main problem now is PSTN Calls. they hear total
> silence! Attached is my current config.
> 
> Please advise.
> 
> Thanks,
> Wilson
> 
> On Mon, Dec 8, 2008 at 8:10 PM, Chris Ward <chrward at cisco.com> wrote:
>> Hi Timothy,
>> 
>> Troubleshooting MOH can get a little involved, but your description provides
>> a good clue. When you say you are receiving Tone on Hold rather than MOH,
>> that means that CUCM is failing to even allocate a MOH resource. This could
>> be a MRGL or a region/codec mismatch.
>> 
>> If you were receiving silence, that would mean the MOH server was allocated,
>> but the stream is either blank or not reaching the destination.
>> 
>> Also, when allocating an MOH stream, there are two big pieces, the source
>> file and the MOH server. Here is how they are chosen. The device initiating
>> the hold selects the Audio Source ID and the device that is being held uses
>> its MRGL to find an MOH server to use for the selected Audio Source ID.
>> 
>> I saw a lot of other emails on this subject so I apologize if this is a
>> dupe.
>> 
>> Chris Ward
>> 
>>> From: Timothy Smith <timotsmith at gmail.com>
>>> Date: Sat, 6 Dec 2008 20:32:16 +0300
>>> To: <cisco-voip at puck.nether.net>
>>> Subject: [cisco-voip] Music On Hold Problem
>>> 
>>> Hi,
>>> 
>>> I have a IPT setup comprising of a cisco call manager 5.1 and using a
>>> cisco 2821 router as an h323 gateway to the PSTN over an E1 line.
>>> Everything works well save for Music on hold! I have Tone on hold
>>> instead both internal and external calls. Could someone please point
>>> me any directions or  some tutorial/guides that can help me overcome
>>> this problem?
>>> 
>>> I have tried whatever I can but no success.  Attached are some of the
>>> screen shots on what I think is important for MOH to work.
>>> 
>>> Thanks!
>>> TS
>>> _______________________________________________
>>> cisco-voip mailing list
>>> cisco-voip at puck.nether.net
>>> https://puck.nether.net/mailman/listinfo/cisco-voip
>> 
>>