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From: schriste@uceng.UC.EDU (Steven V. Christensen)
Newsgroups: sci.electronics
Subject: Telephone device
Message-ID: <6806@uceng.UC.EDU>
Date: 28 Nov 90 19:14:41 GMT
Organization: Univ. of Cincinnati, College of Engg.
Lines: 20

Hi,
	Last month (I think) I saw a project in one of the Radio
Electronic type magazines about a self conrained telephone line
controller. Basically it hooked in parallel with all your phones, and
could be made to prevent numbers beginning with certain prefixes from
being dialed.

	Does anyone know how this is done, since the device is in
parallel with all other phones? How can it prevent me from completing
calls beginning with "1900..."?

	Thanks,

	  Steven

-- 
Steven V. Christensen
U.C. College of Eng.
schriste@uceng.uc.edu
For the adventurous: svc@elf0.uucp