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- Xref: sparky sci.crypt:6710 alt.radio.scanner:3727
- Newsgroups: sci.crypt,alt.radio.scanner
- Path: sparky!uunet!mnemosyne.cs.du.edu!nyx!rwirthli
- From: rwirthli@nyx.cs.du.edu (Ralph Wirthlin)
- Subject: Re: AT&T news release
- Message-ID: <1993Jan12.173826.2812@mnemosyne.cs.du.edu>
- Sender: usenet@mnemosyne.cs.du.edu (netnews admin account)
- Organization: University of Denver, Dept. of Math & Comp. Sci.
- References: <1993Jan12.155103.16454@cis.ohio-state.edu>
- Distribution: usa
- Date: Tue, 12 Jan 93 17:38:26 GMT
- Lines: 23
-
- bonk@elm.cis.ohio-state.edu (gregory j bonk) writes:
-
- >I was sent this from a broadcast to AT&T employees.
- > Thought you might be interested.....
- >
- > to one mile from the base. The AT&T 9530 uses full digital
- > transmission to encode speech onto a radio signal, much like music
- > is encoded onto a CD, and to provide clearer sound over a longer
- > range than cordless phones operating in the 46/49-MHz frequency.
- > AT&T's spread-spectrum, frequency-hopping architecture, which is
- > patent-pending, actually avoids interference by "hopping" the
-
-
- How do you patent something that has been available for the past 30+
- years?
-
- > and multilevel buildings. The random selection of 50 of 173
- > channels, along with digital speech encoding, makes it nearly
- > impossible to eavesdrop on conversations. The AT&T 9530 was
-
- I'd like to know what the channel-switching rate is
-
- Sounds nice, but nothing that NSA should worry about.
-