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- Path: sparky!uunet!news.miami.edu!wupost!darwin.sura.net!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
- Date: Sun, 15 Nov 92 06:32:59 GMT
- From: mje@posix.co.za
- Newsgroups: comp.dcom.telecom
- Subject: Re: Advice Needed on Telephone Security Systems
- Message-ID: <telecom12.845.5@eecs.nwu.edu>
- Organization: Mark's Machine (Working for Olivetti Africa)
- 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 845, Message 5 of 7
- Lines: 50
-
- In <telecom12.838.5@eecs.nwu.edu> petrisko@evax2.engr.arizona.edu
- (William Petrisko) writes:
-
- Here in South Africa there are no cellular services. On my (old)
- house alarm, I had a telephone dialer (with my paging and office
- numbers) and a radio link. There is a transmitter in the roof (loft).
- Almost all alarms in this country are connected in this fasion.
- Connections by phone are more the exception -- do you trust wires?
- Most transmitters are single signal varieties. There are alarm
- 'clearing houses' who receive the signal and then phone/relay the
- signal to your prefered Reaction Unit (which is big buisness in RSA).
- Some Reaction Units do have their own recievers. You pay a small
- installation charge and monthly rental. The cost for alarm and armed
- response was 95 rand a month, about US $35.
-
- Newer transmitters monitor four circuits:
-
- 1) Alarm,
- 2) Forced alarm deactivation (man with gun at you head saying "Switch
- it off"),
- 3) Low Power (Battery, not mains :-),
- 4) Fire detection.
-
- >> d) How can I hide the phone connections at my house or make the
- >> snipping a less than trivial process?
-
- In my new house, I needed more lines. In agreement with Telkom, I
- laid an underground poly-pipe to the distribution poll. All my cables
- are now underground, but the old wires are in the air (unconnected at
- both ends). I'm hoping that any criminal activity will cut the
- obvious overhead wire.
-
- > Honestly, a cheap answer to your problem would be a small board (the
- > manufacturer name escapes me) that monitors the phone line voltage,
- > and connect it to the alarm so it trips the siren.
-
- Are US phone lines _that_ reliable? (Amusing thought of criminal
- element taking out a major phone trunk -- just to see what happens ...)
-
- > Another backup-battery in parallel (or just a bigger aH in it's
- > place) might make you feel more secure too.
-
- Most alarms are 12 volt; got an unused car battery?
-
-
- Olivetti Systems & Networks, Unix Support - Africa
- UUCP: uunet!olsa99!mje (Mark J. Elkins)
- mje@olive.co.za (Postmaster) Tel: +27 11 456 3125
-
-