Changing Caller ID with off-net routing to cell phones

[bmassey]

Hello,

Is it possible to change the caller ID of an inbound call to static number when forwarding the call off-net to a cell phone? Here's what we have set up:

The caller calls a Toll Free number that is routed to our SM and then is routed to an internal VDN on our core. The VDN is sent to a vector with an auto-attendant with options (press 1 for X, press 2 for Y, etc). Some of the calls are routed off-net to an external cell phone. When this happens, the originating caller ID shows on the cell phones but our management wants to have another static number show as the ID so the cell phone users can program the numbers to identify as business calls (some of these users are after hours reps). We use SIP for trunking and I have not been able to find a solution for this, which is why I'm reaching out today.
We have tried routing the calls to stations with call forwarding active, we have tried routing between VDNs but nothing worked. Any suggestions?
Thank you