[cisco-voip] CME to CM 4.1 SCCP Call info - more questions

[Kevin Thorngren]

Hi Bob,

I haven't tried this, don't have it setup at the moment, but will try 
to walk through what happens.

CCM IP Phone (Phone A) conferences two CME IP Phones (Phone B and Phone 
C):
- Phone A and Phone B are connected
RTP Stream: Phone A------CME (MTP)-----Phone B
- Phone A hits Confrn and connects Phone C
RTP Stream: Phone A------CME (MTP)     Phone B
                                +-------Phone C
- Phone A hits Confrn again to connect B
RTP Stream: Phone A---CFB---CME (MTP)-----Phone B
                        +----CME (MTP)-----Phone C
For this case the CME will still be used as an MTP and will send 
individual streams to the CCM CFB.  From a CCM perspective the CFB 
needs to stream to each endpoint in the conference and CME is signaling 
the endpoint address as the MTP for each CME phone.

CME Phone B conferences Phone A and Phone C
- Phone A and Phone B are connected
RTP Stream: Phone A------CME (MTP)-----Phone B
- Phone B hits Confrn and connects Phone C
RTP Stream: Phone A      CME (MTP)     Phone B
                                           |
                                        Phone C
- Phone B hits Confrn again to connect Phone A
RTP Stream: Phone A------CME (CFB)-----Phone B
                                +-------Phone C
In this case the two CME phones will stream to the CME CFB (on UDP port 
2000 I believe).  The CME CFB will mix the streams and send one stream 
to the CCM phone.

Again, I don't have this setup to confirm but believe this is the way 
it will work.  You can web into the phones (http://<phone IP Address>) 
and look at the Stream 1 statistics to see where the phones are 
streaming to at any point in the call.

Please let me if you find anything different or have any questions.

Kevin
On Dec 1, 2005, at 12:56 AM, Bob A. Bowie wrote:

> If I initiate a conference from the Call Manager IP Phones to a two 
> phones on the CME system,
> does this result in two streams to the CME router or a single stream 
> to the MTP?
>  
> Also, what if the conference is generated from the CME phone and 
> conference phones on CME and the Call Manager
> are there multiple streams?
>  
> Thanks
>  
>> ----- Original Message -----
>> From: Kevin Thorngren
>> To: Bob A. Bowie
>> Cc: cisco-voip at puck.nether.net
>> Sent: Wednesday, November 30, 2005 11:01 AM
>> Subject: Re: [cisco-voip] CME to CM 4.1 SCCP Call info
>>
>> Hi Bob,
>>
>> Yes, that is the expected behavior. A call between two phones on the 
>> same CME will have RTP streams directly between the two phones. If 
>> the call is to another destination through the CME then the CME is 
>> used as an MTP device for the call.
>>
>> Kevin
>> On Nov 30, 2005, at 12:51 AM, Bob A. Bowie wrote:
>>
>>> Hello, I have a remote site with CME 3.3 and my Call Manager Cluster 
>>> 4.1.3 configured as H323 trunk
>>> through the WAN.  I have a question about call setup, as I am 
>>> viewing the CME side with a packet analyzer,
>>> I see the CM IP phone stream to the CME router, and the CME router 
>>> to the CME IP  Phone.
>>> QUestion: since these are both sccp phones on a WAN, I thought the 
>>> media stream should be direct, once
>>> call setup is completed?  Is what I am seeing correct?
>>>  
>>> Tx
>>>  _______________________________________________
>>> cisco-voip mailing list
>>> cisco-voip at puck.nether.net
>>> https://puck.nether.net/mailman/listinfo/cisco-voip
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: text/enriched
Size: 3443 bytes
Desc: not available
Url : https://puck.nether.net/pipermail/cisco-voip/attachments/20051201/de9b648a/attachment.bin