[Asterisk-Users] outgoing callerid string

[firedude at shorelinuxsolutions.com]

Is there a way for me to set my outgoing callerid string so that all 
callers outside of my pbx see our callerid string as company name main 
company number but callers inside our telephone network see extension 
holders name extension number?  In looking at the references it looks like 
I can do one or the other but not both.  Does anyone know how I might 
accomplish this?
Thanks for any suggestions.
AJ