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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
- Date: Fri, 25 Dec 1992 15:05:22 GMT
- From: mike%jim.uucp@wupost.wustl.edu (Mike S.)
- Newsgroups: comp.dcom.telecom
- Subject: Re: Stray Thought ... IRcordless? (was Cordless Phones)
- Message-ID: <telecom12.919.13@eecs.nwu.edu>
- Organization: BITS, St. Louis, MO
- 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 919, Message 13 of 14
- Lines: 24
-
- syd@dsi.com (Syd Weinstein) writes:
-
- > Quick, tell me where ... I've yet to find cordless headsets that
- > aren't RF. The Plantronics and 'Hello Direct' ones are RF. (900MHz)
-
- > [Moderator's Note: Well Syd, I *thought* I saw one in the "Hello Direct"
- > catalog (a great thing to read by the way, call them at 1-800-HI-HELLO).
- > But if you say they were RF at 900 megs, then I must have been in
- > error. What about what's-his-name -- that other catalog guy, Drew Kaplan
- > or the other one, Sharper Image? I'm sure I saw one somewhere. :( PAT]
-
- I believe the model listed in the "Hello Direct" catalog is one-way
- infrared. In other words, the headset is transmit-only; the remote
- party is heard through a speaker on the base.
-
- Collisions are a big problem with two-way infrared communication. It
- would probably be necessary to digitize the signal to sort everything
- out. If I am not mistaken, even the IR LANs only transmit in one
- direction at a time, switching at a rapid rate.
-
-
- Mike mike%jim.uucp@wupost.wustl.edu
-
-