🚀 go-pugleaf

>>Can't you instead of blocking have the number be reported as something other
>>than the number you are calling from, like the old blue/black box trick

No, the source of the information is the switch generating the
SS7 commands.  As a subscriber, you cannot directly control the messages.
The days of in band signalling are over.


In article <1992Dec15.152116.26829@newstand.syr.edu>
	lruppert@rodan.acs.syr.edu (Dahr--The Beastmaster) writes:

> I was thinking of something just along those lines the other day.
> All you'd have to do is send a short signal to block/jam the legit one
> sent by the phone company, and then send yours afterwards,
> if the the whole transaction only takes a few tenths of a second

Mr. Louis Ruppert:
have you been reading too many Popular Science magazines?
The caller-id signal is sent between the first and second rings.
The recipient's phone is still on-hook.
How do you propose to send a signal to the recipient when
a) they haven't answered the call yet
b) you don't have an audio path to the recipient until the call is answered.

Depending on the recipient's premesis equipment, it may be possible to
transmit messages to their caller-id box during a conversation
(as long as the caller-id box is still enabled when off-hook).
You cannot delete previously received messages, but you may be able to
add new ones.  The problem is in generating the proper tones:
caller-id uses a 1200 baud FSK encoding that's not made by normal
modems (I think it's Bell 202 instead of Bell 212).

> Since your phone can transmit to the other line before the phone is
> picked up, it should be quite easy to implement this.

On what equipment is this allowed?  Certainly no ESS or crossbar that's
commonly used around here.

-- Jeffrey Jonas
jeffj@panix.com
-- 
Jeffrey Jonas

jeffj@panix.com