On 10/16/2011 19:40, Patrick Elliott wrote:
> this *is* possible, ironically, is because they decided to design the system
> with such a flaw,

You're talking about ANI vs CID. CID is intentionally spoofable so you can 
program your PBX to provide the number the person should actually call back 
(e.g., the 800-number customer service) rather than the number of the desk 
phone of the one guy who you happen to be talking to in a cubicle farm.

ANI is automatic number identification, which is what you get when (for 
example) someone calls you on your 800 number. It's what the billing is 
based on.

CID is whatever the system decides it is, and some people can get permission 
to provide that. You don't have to cause any sort of "failure" or 
"injection". It's an intentional feature being misused.

-- 
Darren New, San Diego CA, USA (PST)
   How come I never get only one kudo?

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