[cisco-voip] best way to route call between 2 CUCMs

[Brian Meade]

SIP Trunk is the way to go these days especially with 9.x/10.x.  With SIP
inspection opening UDP pinholes, you may be able to get around the MTP
Required.  I try to get rid of MTPs unless absolutely necessary.

On Mon, Feb 9, 2015 at 5:08 PM, Michael Hamann <mail at mhamann.net> wrote:

>  Hello,
>
> we support a company with severel sub organisations. We have a large CUCM
> cluster (Ver 9.1), which provided telephony for most of the users. Now one
> unit is building up a seperate smal CUCM (Ver 10.x). Both units networks
> are seperated through a firewall, no overlapping subnets. The firewall is
> supported by us, so we could add additional firewall rules..
>
> Call between these units should be routed via IP and not via a
> back-to-back ISDN gateway. What would be the best and easiest way to
> configure this ?
>
> - SIP trunk between the two CUCM with "media termination point required"
> set to true ?
> - H323 Intercluster trunk ?
>
> or do we need an ISR with cube to do this ?
>
> thank you for your advice...
>
> kind regards
> Michael
>
>
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