I haven't looked into this in over a year, but when I looked into it - It was made pretty clear this wasn't possible. The data is sent from the CO. You might be able to send your own, but unless someone at the phone company screwed up - you won't be able to forge it so it gets through.
Now there is stuff like aniII and the fcc made changes to the way private payphones report their lines and stuff.
There might be some new loopholes, but I just don't see any us phone companies letting this happen.
|