[asterisk-users] Obtaining callerid on a PRI for billing purposes (with non toll-free numbers)

[Alfred Monticello]

I'm thinking of starting a partyline, where people call in and talk to other people. For record keeping and billing purposes, I'd like to go by the callers telephone number. 

This method works fine as long as the caller doesn't have callerid blocked, but what are my options if they do block their number? I know there must be a way to report it, because there is a service provider here in my area that if I call and block my number, they are still able to obtain it. I know that when dialing a toll-free number, that the number is reported regardless. But what about regular non-toll free numbers?

Does anybody have any ideas how I can do this? Are there any providers out there that offer this service over PRI or some other method?

Thank you in advance.


      
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