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Article #583Phone lock - article in Radio Electronics
From: ramcte01
Date: Mon, 19 Jun 1989 15:58
Date: Mon, 19 Jun 1989 15:58
23 lines
1196 bytes
1196 bytes
For those of you interested in phone locking devices to prevent outgoing
long distance calls, you may be interested in looking at Radio-Electronics,
October and November, 1988, for plans for a Digital Telephone Lock.
The lock described prevents all outgoing calls without a 4-digit combination,
but could used as a starting point for a 0/1/976 prefix decoder to lock out
long distance/toll calls.
Rick McTeague
System Programmer
Electrical Engineering Department
Speed Scientific School
University of Louisville
Louisville, KY 40292
(502) 588-7020
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!ULKYVX.BITNET!ramcte01 From: ramcte01@ULKYVX.BITNET Newsgroups: sci.electronics Subject: Phone lock - article in Radio Electronics Message-ID: <17ramcte01@ULKYVX.bitnet> Date: 19 Jun 89 15:58:00 GMT Sender: daemon@ucbvax.BERKELEY.EDU Organization: University of Louisville Lines: 23