[cisco-voip] Connecting to third party CUCM via ICT trunk

[Damian Turburville]

I am probably being thick here but will the phones not try and establish an RTP 
connection between themselves which could be on a wide range of ports? 

Damian





________________________________
From: Ryan Ratliff <rratliff at cisco.com>
To: Paul <asobihoudai at yahoo.com>
Cc: Damian Turburville <d_turburville at yahoo.com>; "cisco-voip at puck.nether.net" 
<cisco-voip at puck.nether.net>
Sent: Tue, May 31, 2011 9:35:37 PM
Subject: Re: [cisco-voip] Connecting to third party CUCM via ICT trunk

IME is quite the complex solution for sites that are already connected.  Using 
an ICT will be the way to go. 
If firewalls traversal is required then TRPs or MTPs should be sufficient.  ICTs 
use H.323 as far as firewalls are concerned.


-Ryan 

On May 31, 2011, at 10:59 AM, Paul wrote:

I would suggest you upgrade and use IME which was created for this exact 
purpose...but that's obviously not the answer you were looking for. . .


________________________________
From: Damian Turburville <d_turburville at yahoo.com>
To: cisco-voip at puck.nether.net
Sent: Tuesday, May 31, 2011 7:30 AM
Subject: [cisco-voip] Connecting to third party CUCM via ICT trunk


Hi,
I am looking for some advice. I have a CUCM 6.1 system at one of my sites and we 
have a third-party who is on our WAN (but controls their own LAN and servers 
etc) who also has a Call Manager (not sure what revision) and they would like to 
make calls between the two sites. I was thinking it would probably be fairly 
easy to setup an ICT trunk between the two systems but I am sure our security 
team would have some issues with that. Is there any way of making the trunk more 
secure? Locking down ports on the firewall etc, maybe some kind of VPN 
connection? Is there anyone out there that has done this that could share their 
experiences?
Many thanks,
Damian

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