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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
- Date: Thu, 19 Nov 1992 06:41:37 GMT
- From: gordon@sneaky.lonestar.org (Gordon Burditt)
- Newsgroups: comp.dcom.telecom
- Subject: Re: Advice Needed on Telephone Security Systems
- Message-ID: <telecom12.861.9@eecs.nwu.edu>
- Organization: Gordon Burditt
- Sender: Telecom@eecs.nwu.edu
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 12, Issue 861, Message 9 of 9
- Lines: 31
-
- Has anyone considered a telephone line alarm? This thing would go
- between your house wiring and the phone company's demarcation point.
- It sounds an alarm (although you probably wouldn't want this to
- directly call the police) when:
-
- (1) The line is disconnected (loss of battery). Might misfire during CO
- cutovers -- or maybe you wanted to detect them.
-
- (2) The line is shorted. Might also detect a flooded CO.
-
- (3) If the line goes off-hook from OUTSIDE your house, but not inside.
- This may signal a lineman or phone service thief connecting a butt
- set into your line to make free phone calls, or a neighbor who found
- this extra live pair run into his house, or an incompetent cop
- or private detective installing a wiretap.
-
- Naturally, the alarm has to tolerate incoming and outgoing calls
- without false alarms.
-
- An optional function when the alarm detected (3) would be to jam the
- line by going off hook and sending a test tone to jam dialing. (What
- would happen if you jammed pulse dialing by sending a sequence of 15
- pulses, timed just like dialing "0" but more of them? Would
- technicians at the central office get mad?) This you would need to
- turn off if you reported trouble and expected tests and/or repairs
- done on your line.
-
-
- Gordon L. Burditt sneaky.lonestar.org!gordon
-
-