Xref: utzoo comp.dcom.modems:2173 comp.mail.uucp:1535
Path: utzoo!attcan!uunet!ispi!jbayer
From: jbayer@ispi.UUCP (id for use with uunet/usenet)
Newsgroups: comp.dcom.modems,comp.mail.uucp
Subject: Re: Catatonic TrailBlazer Pluses
Summary: Trailblazer + & power supply
Message-ID: <151@ispi.UUCP>
Date: 1 Aug 88 14:31:49 GMT
References: <1461@pyrnj.uucp> <22499@amdcad.AMD.COM> <407@n3dmc.UU.NET>
Distribution: comp
Organization: Intelligent Software Products, Inc.
Lines: 25

In article <407@n3dmc.UU.NET>, johnl@n3dmc.UU.NET (John Limpert) writes:

> Probably not a coincidence.  I've had the same thing happen to my TB+
> with the 4.0 ROM's.  The TB+ appears to have a problem with power supply
> output sequencing/reset.  Short power hits from thunderstorms will put
> the modem in zombie mode.  I just cycle the power and that fixes it.  I
> have had similar problems with other equipment.  If the power supply was
> designed properly, the modem would keep on running or reset itself,
> dependent on the severity of the power hit.  I'm not an engineer, but


While I would agree with the possibility of the power supply, I would never
run a un*x system without a standby power supply.  The SPS should
maintain the voltage within certain levels, and ideally should do a switch-over
within 4-8 milliseconds.   For those people who are really paranoid you can
get an uninterruptable power supply for about twice the money.  Using either a
UPS or an SPS should solve any and all problems related to the ac line.

Jonathan Bayer
Intelligent Software Products, Inc.
19 Virginia Ave.
Rockville Centre, NY   11570
uunet!ispi!jbayer