Here is the Help entry from Callcentric:
How do I verify my non Callcentric caller ID?
Verifying your non Callcentric caller ID is simple. You will need to follow the instructions below:
Please place a call, with your caller ID unblocked, from each of the lines/numbers you would like to use as an outbound caller ID to 1-866-346-0222. You will hear an error message then hang up.
Open a Trouble Ticket on your Callcentric account asking to get your number(s) verified.
Include within the trouble ticket the numbers you would like added on your account, and the approximate date, time, and time zone you placed the verification calls to the Toll Free number listed above. Once we verify that we have received your calls for the listed numbers we will add those numbers as verified numbers on your account and update your ticket.
Once we have properly verified your numbers and updated you you can then begin using these caller IDs by setting your desired caller ID in your preferences, or by sending them out selectively.
Thanks caseydoug!! I guess the ball is now in VOIPo's court to let us know their thoughts on it and if they have/can include the feature in their roadmap.
Bookmarks