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From: Miguel_Cruz@ub.cc.umich.edu
Newsgroups: comp.dcom.telecom
Subject: Signalling Methods With Caller ID
Message-ID: <telecom-v09i0441m03@vector.dallas.tx.us>
Date: 11 Oct 89 19:04:34 GMT
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X-TELECOM-Digest: volume 9, issue 441, message 3 of 4

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