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- Path: sparky!uunet!cs.utexas.edu!uwm.edu!lll-winken!telecom-request
- From: acrosby@uafhp.uark.edu (Albert Crosby)
- Newsgroups: comp.dcom.telecom
- Subject: Re: Apartment Security Stupidity
- Message-ID: <telecom13.37.11@eecs.nwu.edu>
- Date: 22 Jan 93 02:42:03 GMT
- Sender: Telecom@eecs.nwu.edu
- Organization: TELECOM Digest
- Lines: 45
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 13, Issue 37, Message 11 of 15
-
- In several of the recent issues, PAT has mentioned that it is stupid
- to use a plain telephone line for an apartment building security
- system. A poster or two have noted that the system is fairly common,
- and that it is less expensive to use the systems that use POTS.
-
- In SWBT territory, it at least was possible to have a POTS line
- _with_no_1+_long_distance_carrier. I had a good friend who used this
- as a cost control measure. (No teenagers, he and his wife just felt
- less inclined to make long distance calls if they had to dial on a
- card.)
-
- If you blocked 900 numbers, 976 numbers (and I guess in this day and
- age, 800 numbers) plus had no default LD carrier, is there any reason
- such a line wouldn't be suitable for a security system?
-
-
- Albert
-
-
- [Moderator's Note: No, provided the line also had Billed Number
- Screening, meaning collect and/or third number calls could not be
- billed to it, and provided security was not compromised (i.e. calls
- could get through without busy signals -- call waiting on each line --
- and actual phone numbers could not be ascertained by listening to what
- was being dialed, and the door could not be tricked into unlatching by
- means of a pocket tone-decoder blown into the receiver). It might also
- be wise if the phone at the door (a) was non-pub in directory
- listings, (b) had a number not generally known except to people in
- management who need to know it, and (d) was set for one-way service,
- outgoing local calls only in the event someone did learn the phone
- number. To prevent the line from being used for social conversations
- from the lobby to an apartment or excessive units from being charged
- if it is a metered line, you might also consider a timer which would
- disconnect the line after 30 seconds or so of it going off hook. A
- special touchtone pad which went dead after the maximum number of
- digits required would be a good idea as would an armored handset ala
- payphone style to prevent the receiver from being liberated every week
- or two by vandals. Glue the ends of the receiver where they unscrew to
- avoid losing the mouth or earpiece innards to pranksters. Basically,
- making it like a payphone style handset or if possible, a speakerphone
- hidden behind a little slot people would speak into, with only the
- *metal* buttons of the touchtone pad protruding out of the wall would
- be best. Avoid the plastic touchtone pads if possible since people
- like to hold cigarette lighters up to them and melt the buttons, etc. PAT]
-