[asterisk-users] Newbie question: how to proxy the *real* caller-id on find-me/follow-me

[Philip Prindeville]

Philipp Kempgen wrote:
> Anselm Martin Hoffmeister wrote:
>
>   
>> In most cases it seems to end at
>> the fact that providers "correct" caller-ids they get from the calling
>> party: If you send any number which is assigned to the PRI (or SIP
>> trunk), that is fine; if you send another number, it will be changed to
>> the (first) number of the PRI/trunk.
>>
>> Few providers allow for "foreign" caller ids to be sent over their
>> equipment - in some countries this is even illegal.
>>
>> For example, one of my providers (German) allows to set any CALLERID,
>> but their documentation warns to not do stupid tricks, as calls can be
>> tracked and using malicious information will be prosecuted. This feature
>> is to be used only for sending _my_ cell phone number etc.
>>     
>
> Do you know of any GSM providers/contracts where "faking
> for a valid reason" is possible?
>
> Regards,
>   Philipp Kempgen
>
>   

I can think of some...  in rural Idaho, cell coverage is sparse.  I 
might check my voice mail of my cell phone via a land line, and want to 
call back with a response originating from my cell number...  Also the 
case if I have my cell set to forward-on-busy to my land line, or if I'm 
hosting an "answering service", etc.

-Philip