[Asterisk-Users] Spoofing CallerID on Demand

[Andrew Kroh]

I have an outgoing line that allows me to set my caller id.  I want to be able to change the caller id when ever I place a call using this line.  I would like my user to press 7, then be prompted for their 10 digit caller id number, then be promted for the number they would like to call in the form 1NXXNXXXXXX.
 
How can I accomplish this???
 
Right now I am using this script that users have to dial _71NXXNXXXXXXXXXXXXXXXX , where the first 12 digits are the number to be called and the last 10 are the caller id.
 
My dialplan:
 
exten => _71NXXNXXXXXXXXXXXXXXXX,1,SetCallerID(${EXTEN:12})
exten => _71NXXNXXXXXXXXXXXXXXXX,2,StripLSD(10)
exten => _71NXXNXXXXXX,3,Dial(~~~,${EXTEN:1})
 
exten => h,1,Hangup
exten => i,1,Hangup
exten => t,1,Hangup