Re: (ASCEND) MAX 4000 + 56K modem cards = fire

To: Karl Denninger <karl@Mcs.Net>
Subject: Re: (ASCEND) MAX 4000 + 56K modem cards = fire
From: Phillip Vandry <vandry@Mlink.NET>
Date: Tue, 9 Sep 1997 14:53:23 -0400 (EDT)
cc: ascend-users@bungi.com, pascal@Mlink.NET
In-reply-to: Your message of "Tue, 09 Sep 1997 11:08:11 EDT." <19970909110811.61412@Jupiter.Mcs.Net>
Sender: owner-ascend-users@max.bungi.com

> 	If you MUST build hardware which requires forced-air cooling to
> 	operate without damage (I fully understand that density and
> 	dissipation requirements sometimes require this) then you have
> 	an *OBLIGATION* to include temperature monitoring facilities in
> 	your harware which generate reportable status -- as well as an
> 	automated overtemp shutdown.
>
> 	Anything less should, IMHO, VOID your UL/CSA certification.
>
> 	CISCO does this in their larger router products (which will
> 	definitely croak if the fans fail or air intake is obstructed).
> 	ASCEND, at least in the MAX, does not (I don't know about the
> 	TNT).  But they should.  How much does a thermocouple and a
> 	small board to shut off the power supply cost?  $10?  C'mon
> 	folks.

But you can't beat the GRF though!

A temperature monitor with auto shutdown, *PLUS* tachometers on each fan
to make sure they are spinning nice and fast :-)

-Phil
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Re: (ASCEND) MAX 4000 + 56K modem cards = fire

From: Karl Denninger <karl@Mcs.Net>

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