[comp.dcom.telecom] Signalling Methods With Caller ID

Miguel_Cruz@ub.cc.umich.edu (10/12/89)

Just wondered... There's been a lot of discussion on the methods used
for signalling with the new Caller ID systems; naturally it all went
in one ear and out the other.

My question is this: would it be possible (not that I have any idea
why I'd want to) to make a device which could mimic the signals sent
from the CO such that when I called someone with a Caller ID box,
once they answered, I could make numbers appear on their little
screen?

Or does the box ignore signals once a phone is off-hook?  Or are the
signals out of the bandwidth that would make it from my phone to
their phone?

Miguel_Cruz@ub.cc.umich.edu