Path: utzoo!utgpu!watserv1!maytag!xenitec!zswamp!root
From: root@zswamp.fidonet.org (Geoffrey Welsh)
Newsgroups: comp.dcom.modems
Subject: Re: Why do they insist on power cubes???
Message-ID: <6597.2788009C@zswamp.fidonet.org>
Date: Sun, 06 Jan 91 16:22:39 EST
Organization: Izot's Swamp BBS - Kitchener, Ontario

Larry Lippman (larry@kitty.UUCP ) wrote:

 >In article <191@raysnec.UUCP>, shwake@raysnec.UUCP (Ray 
 >Shwake) writes:
>       What began as an annoyance has become a logistic mess. Some years
> ago, manufacturers of external modems like Hayes moved their power supplies
> to external power cubes which fit directly into the power line.

 >        There is a rather attractive design reason for going 
 >to external
 >power cubes - it vastly simplifies obtaining UL, CSA and VDE 
 >approval on
 >the modem since there is no AC power line voltage in the 
 >modem enclosure.

   I'm sure it makes it much easier to engineer a reliable modem.  Many moons 
ago, I owned a Prometheus Promodem 1200G (don't laugh - it was state of the art 
at the time!) and I was very pleased with the modem except that it had an 
internal power supply and tended to overheat and malfunction if left on all the 
time.
 

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