udougc@ecsvax.UUCP (05/02/84)
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Sorry if this is the wrong group but part of the subject was raised
here.
Please does anyone have experience with BSR home controllers and
cordless telephones and/or intercoms. I have been informed that they are
incompatible,... would like to know, they look good for a bedridden
relative (confined to a bed that is!!!!!).
Doug. C.msc@qubix.UUCP (Mark Callow) (05/05/84)
> Sorry if this is the wrong group but part of the subject was > raised here. > > Please does anyone have experience with BSR home controllers > and cordless telephones and/or intercoms. I have been informed > that they are incompatible,... would like to know, they look > good for a bedridden relative (confined to a bed that > is!!!!!). > Doug. C. I think you are confusing cordless 'phones, which use radio communication between the handset and the base unit & 'phone network, and wireless intercoms, which use use the power wiring like the BSR units. There is no incompatibility between cordless 'phones and BSR home controllers. There may be incompatibility between wireless intercoms and BSR units depending upon the carrier frequencies used over the power wiring. -- From the TARDIS of Mark Callow msc@qubix.UUCP, decwrl!qubix!msc@Berkeley.ARPA ...{decvax,ucbvax,ihnp4}!decwrl!qubix!msc, ...{ittvax,amd70}!qubix!msc "I'm a citizen of the Universe, and a gentleman to boot!"
jeff@heurikon.UUCP (05/21/84)
> >> MOST cordless phones use the AC line to communicate to the handset. > How do they manage that piece of magic? The handset doesn't plug into a > wall socket. Do you mean they use the AC line as an antenna? Even that is > a little bizarre. Many clock-radios use an additional wire in the AC cord > as an antenna but they do not use the AC wiring. Most of the cordless > phones that I have seen in the stores have telescopic rod antennas. They use two frequencies and two paths. The base unit transmits to the remote handset by injecting a signal into the AC power lines of the house. The base picks this up via a loopstick antenna *inside* the handset. The AC lines radiate the signal all around the house. The remote transmits a signal to the base using the telescopic antenna which the base picks it up via a telescopic antenna of its own. The handset is rigged so that the antenna need not be up to work; there is a large metal plate inside the case which is used if the antenna is retracted, so the transmitter is still loaded. (This is based on the Phone-Mate which I use. I took the thing apart. The hard part was finding the hidden screws which hold the case together.) -- /"""\ Jeffrey Mattox, Heurikon Corp, Madison, WI |O.O| {harpo, hao, philabs}!seismo!uwvax!heurikon!jeff (news & mail) \_=_/ ihnp4!heurikon!jeff (mail - fast)