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Cisco Employee

2 Independant Call Manager 'domains' communicating with each other

Can I have 2 or more seperate Call manager systems (Clusters) that can communicate with each other? Ie: Phoenix Site Cluster and a New York Site Cluster That I could use ie: extensions 5xxxx in Phoenix and 6xxxx in New York and when for example someone in new york dials 5xxxx it routes it to the Phoenix Call manager Cluster to route to the appropriate phone/device/gateway?

Cisco Employee

Re: 2 Independant Call Manager 'domains' communicating with each

Yes. If you add a gateway and choose H.323, you will see an item for H.225 to be used with Cisco H.323 based voice gateways (for example), and and item 'Inter-Cluster Trunk' which is used to route calls between different CallManager clusters.

New Member

Re: 2 Independant Call Manager 'domains' communicating with each


Create a gateway on the Phoenix site as a H323 and select the Device protocol as Inter-Cluster trunk

and give the Device name as the IP address of the New York call manager's IP address. And on the Route Pattern for 6xxx select the Route List/Gateway as

what you just created. Do the same thing on the New York site pointing to the Phoenix Call manager.

It should work fine.

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Thaya N

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