[cisco-voip] Strange intermittent MoH problem

[Ryan Ratliff]

I'll reserve judgement until a sniffer capture is done.   Even if the  
unicast RTP stream from MP somehow made it to the wrong IP phone the  
phone would still have to be listening on that specific RTP port for  
the user to hear it.

-Ryan

On Apr 1, 2008, at 5:18 PM, Erick Bergquist wrote:
Well, The MP is using Unicast for the conference with ports in 5000
range on the MP side and phones are using the normal UDP RTP range.
The Mcast MoH is using the usual RTP port range also.

On Tue, Apr 1, 2008 at 3:35 PM, Tim Reimers  
<treimers at ashevillenc.gov> wrote:
> That's what I was thinking might be happening.. same IP/port conflict
>  for some as-yet undetermined black magic reason....
>
>
>
>  -----Original Message-----
>  From: Ryan Ratliff [mailto:rratliff at cisco.com]
>  Sent: Tuesday, April 01, 2008 4:25 PM
>  To: Erick Bergquist
>  Cc: Tim Reimers; cisco-voip at puck-nether.net
>  Subject: Re: [cisco-voip] Strange intermittent MoH problem
>
>  Does MP use multicast audio for it's RTP streams?   Since each MOH
>  source gets its own multicast IP address/port if MP is sending  
> multicast
>  for a conference (I have no idea if it does this or not) and it  
> ends up
>  sending on the same IP/port the MOH server is using then this could
>  happen.
>
>  I'd work to get a sniffer capture so you can see what the phone is
>  receiving.
>
>  -Ryan
>
>  On Apr 1, 2008, at 4:26 PM, Erick Bergquist wrote:
>  The mcast config is normal, nothing special being done outside the  
> norm.
>  IP phones hear this as well as outside callers on a H323 gateway  
> when on
>  hold sometimes.
>
>  On Tue, Apr 1, 2008 at 3:13 PM, Tim Reimers  
> <treimers at ashevillenc.gov>
>  wrote:
>> Something in the multicast configuration of the involved layer 2
>> devices?
>>
>>
>>
>>  -----Original Message-----
>>  From: cisco-voip-bounces at puck.nether.net
>>  [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Erick
>> Bergquist
>>  Sent: Tuesday, April 01, 2008 4:06 PM
>>  To: Ryan Ratliff
>>  Cc: cisco-voip at puck-nether.net
>>  Subject: Re: [cisco-voip] Strange intermittent MoH problem
>>
>>  Both the music and the MP call, but it is clear and not cutting and
>> out  every second or so.
>>  When I've caught it happening, it seems to be calls where MoH is
>> playing  due to a Network Hold event (parked call, etc). I can't get
>> it to happen  with a user hold.
>>
>>  On Tue, Apr 1, 2008 at 2:32 PM, Ryan Ratliff <rratliff at cisco.com>
>> wrote:
>>> IP phones or PSTN calls?   Sounds like either crosstalk or a random
>>>  two devices using the same receive port for RTP and the stream from
>>> MP reaching the phone somehow.
>>>  Do they hear just the MP audio or both MOH and MP audio alternating
>>>  every second or so?   The former is crosstalk, the latter is both
>>> RTP
>>>  streams reaching the phone on the port the phone is listening on.
>>>
>>>  -Ryan
>>>
>>>
>>>
>>>  On Apr 1, 2008, at 3:07 PM, Erick Bergquist wrote:
>>>  Anyone ever see people on hold with Multicast MoH (Network Hold it
>>> appears to happen with) hear a meetingplace audio conference call
>>> while they are on hold? The CCM and MP are seperate servers with
>>> different conference bridges so I'm puzzled how the person on hold
>>> hears the MP conferences sometimes. It doesn't happen all the time.
>>> Is
>>
>>> real intermittent.
>>>  The Call Manager is version 4.1(3)sr4d and MeetingPlace Enterprise
>>  5.4.
>>>
>>>  Erick
>>>  _______________________________________________
>>>  cisco-voip mailing list
>>>  cisco-voip at puck.nether.net
>>>  https://puck.nether.net/mailman/listinfo/cisco-voip
>>>
>>>
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>>
>>
>
>
>