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New Member

Partial PRI config

If you have a partial PRI coming into a gateway from the telco how should you configure the pri-group? For example I know that with a full PRI using MGCP you would use the command:

pri-group timeslots 1-24 service mgcp

On one of my gateways this command has been configured yet it only connects to a partial PRI circuit. (ie: We pay for 12 channels as opposed to the full complement of 23)

I had thought the command would be configured something like this...

pri-group timeslots 1-12 service mgcp

or possibly

pri-group timslots 12-23 service mgcp

depending on the ascending or descending selection. I'm guessing it does not make any difference since the telco presumably determine which channels are allowed to come up on the PRI even if I have the pri-group configured to use all 23 channels? Hoping someone can confirm if this is correct? TIA

Hall of Fame Super Gold

Re: Partial PRI config


Partial PRIs are always provisioned from the lowest channel. So timeslots 1-12 would be the right command. But since you are using MGCP, who decides the channels to use, is ultimately the CCM, so you can find that also a "full PRI" config at gateway level works if the CCM is configured right.

Hope this helps, please rate post if it does

New Member

Re: Partial PRI config

I see what you're saying ref mgcp. Makes sense... thanks!