Intercluster trunking

[Robert Milanovich]

I have two call managers, one is a 4.0(1) and the other is a 3.2. I also have one 3745 that I can use as a gatekeeper.

What are the steps to setting up these two to talk to each other? I've read teh docs and the setups are slightly different cuz of the two versions.

From what I've read I need to do something as follows:

On 3.2 set up a gatekeeper and point it to my 3745. Set up a H323 gateway of a intercluster trunk type. Route calls to this.

on 4.0(1), set up the gatekeeper, and set up a Trunk.

[Daniel Baum]

Yes.

Follow this document for CallManager 3.2:

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_configuration_example09186a0080169445.shtml

Follow this document for CallManager 4.0:

http://www.cisco.com/en/US/tech/tk652/tk701/technologies_configuration_example09186a0080210cfe.shtml

The configuration of the Gatekeeper is the same regardless of the version of CallManager.

The config will be something as such:

Gatekeeper

zone local Gatekeeper cisco.com

zone subnet CCMv32 cisco.com

zone subnet CCMv32 cisco.com 0.0.0.0/0 enable

zone subnet CCMv40 cisco.com

zone subnet CCMv40 cisco.com 0.0.0.0/0 enable

zone prefix CCMv32 408* (when GK receives 408 it will forward to CCMv32)

zone prefix CCMv40 972* (when GK receives 972 it will forward to CCMv40)

gw-type-prefix 1#* default-technology (only place 1# in the CCM configs)

no shut

Dan