Outbound Fax - Caller ID (Can it be changed?)

We just moved to a new office. After the move we learned our fax number could not be moved however there is a forwarder that works just fine. When we send faxes, the recipeint sees the number assigned to the line the fax uses. It won't display our actual number. Is there a configuration setting that we can define the Caller ID? Xerox ColorQube 9202

-W