[cisco-voip] Cisco Panasonic Integration

[Fedorov, Konstantin]

Hello David.

 

Question very interesting.

 

If you notice Panasonic send RTP stream to the UDP port number 4000.

Which 1 less than CCM send in the OLC  message, where it opens RTCP stream.

 

This is from standard where RTP port - for example x , RTCP port must be x+1

 

So Panasonic make assumption about RTP , and its seems that it donn't look at the 

OLCack from CCM where it opens real RTP ip address and also port number, and also 

send new RTCP port number, in you trace this values 31788 - RTP ,  31789 - RTCP.

 

So its seems that   we have two bugs here .

 

1. on the CCM side - it change RTCP port numbers inside the same session. 

 

2. Panasonic - donn't look at the OLCack message.

 

 

What can be done to resolve this.

1.IPIPGW with RTP proxy

2. Try check " Media Termination Requied" on the GW configuration page on the CCM.

But actually I donn't  like this.  The better I think 1 option.

 

 

-----------------------
Sincerely Yours,
Konstantin Fedorov

  _____  

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of David Garcia Ternero
Sent: Thursday, September 20, 2007 1:38 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Cisco Panasonic Integration

 

Hi,

 

I am trying to integrate a Cisco Call Manager 5.1 with a Panasonic PBX with a H.323 IP card, using Cisco IP Phones and Panasonic analog phones. To do that, I have configured the Panasonic IP card as an H.323 Gateway in the Call Manager, and I route the calls to the Call Manager in the Panasonic PBX. The call establishment seems to proceed ok, and you can call in both directions. But there is sound only in the Panasonic phone, and not in the Cisco phone, because the voice stream goes from the Panasonic IP card to the Call Manager, instead of going to the IP Phone. I have some traces of the traffic and I see that in the h.245 open logical channel message, the Call Manager includes their own IP address, instead of the IP address of the IP Phone, but in the open logical channel ACK message, the call manager includes the IP address of the IP Phone. 
Is it a bug in the implementation of the protocol? are there any mistake in the configuration? I have a Cisco 2801 CCME that maybe can help in the deployment. 

Thanks

 

David García Ternero

_______________________________________

Ingeniero Especialista Networking

VisaSur Telecomunicaciones, S.L.

 

C/ Fernando Villalón, s/n

Edif. Prado I - Local Trasero

41004 - Sevilla - España

 

Tel:     954 63 11 55

Fax:    954 41 02 50

Móvil:  607 82 92 59 - VPN: 380

e-mail: david.garcia at visasur.com

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