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- Newsgroups: alt.dcom.telecom
- Path: sparky!uunet!utcsri!newsflash.concordia.ca!mizar.cc.umanitoba.ca!silver.cs.umanitoba.ca!ckirby
- From: ckirby@silver.cs.umanitoba.ca (Chris Kirby)
- Subject: Re: How does caller ID work?
- Message-ID: <ckirby.727980782@silver.cs.umanitoba.ca>
- Keywords: caller id
- Sender: news@ccu.umanitoba.ca
- Nntp-Posting-Host: silver.cs.umanitoba.ca
- Organization: University of Manitoba, Winnipeg, Canada
- References: <michaelm.727416353@extro.ucc.su.OZ.AU> <C14wy0.Aqy@hatch.socal.com>
- Date: Mon, 25 Jan 1993 16:53:02 GMT
- Lines: 28
-
- In <C14wy0.Aqy@hatch.socal.com> richg@hatch.socal.com (Rich Greenberg) writes:
-
- >In article <michaelm.727416353@extro.ucc.su.OZ.AU> michaelm@extro.ucc.su.OZ.AU (Mike McCormack) writes:
- >>Does anyone know how caller ID works (ie. from a technical viewpoint)?
- >>I read an article in the paper about it, which told me what it does,
- >>but said nothing more than "it is a little black box you connect to your
- >>phone". Does the exchange send out caller ID info by default or do you
- >>have to ask for it?
-
- >If you subscribe to and pay for the service, the data is sent in ASCII
- >at 1200 baud (but NOT the usual 1200 baud modem tones) between the
- >first and second rings.
-
- So, theoretically, one could modify and old 1200 baud modem to use the
- modified tones (or even just pass the signal through some kind of filter to
- transform the tones to normal 1200 baud tones) and have caller ID for free?
- I've kind a smattering of the concepts here, but I'm not sure if this is
- possible, could someone who knows better fill me in?
-
- BTW, when I say free, I mean in the sense that I wouldn't have to go
- out and by a caller ID phone, since I'd still have to subscribe to get
- the information coming down the line.
-
- --
- Chris Kirby |
- ckirby@silver.cs.umanitoba.ca | APATHY RULES !!!
- University of Manitoba | ( but who cares? )
- Winnipeg, Manitoba |
-