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Call route decision in centralised CCM environment

I'm planning to implement centralised IP telephony network with CCM cluster in the center and PSTN getaways in regions and in the center. All PSTN gateways are MGCP gateways.

International calls and local calls for the region will be placed through the nearest regional PSTN gateway. If all PSTN lines on the gateway are busy - international call will be rerouted to the central PSTN gateway. If call destination is PSTN in another region - call must be rerouted via our corporate WAN to the PSTN gateway of the destination region.

May be there are something like "Best practice" for this topic?

And the main question. All this call routing decisions can be performed with Partitions CallingSearchSpaces and Route Lists?


Re: Call route decision in centralised CCM environment

What you are trying to achieve can be performed by using route-list (RL) and route-groups (RG), CSS/Partitions. Basically, you will need to configure route-patterns that point to RL. The RL can be ordered such that there is a preference as far as what gateway to use. For example:

User in San Jose wishes to dial PSTN number in Dallas. So you will need to create a route-pattern with the Dallas PSTN number:

Route-Pattern (RP): 91214.XXXXXXX

Next, this RP will call a (RL) with 2 - RGs. The first RG in the RL will be Dallas, and the second RG will be San Jose. So what will happen is that once the RP above is matched, it will call the RL defined, which will then use the Dallas RG first. If the Dallas RG is not available, then it will use the San Jose RG to route the call as a backup.




Re: Call route decision in centralised CCM environment

One more thing you may want to look into is the AAR feature on callmanager.

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