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





On Tue, 9 Sep 1997, Jake Messinger wrote:

> On Mon, 8 Sep 1997, Jason Nealis wrote:
> 
> > 
> > 
> >  Ascend has taken steps to improve the cooling through a box, The older
> > MAX's have only 2 outake fans, (Which are the old sleave bearing fans)
> > they redesigned the box in the latter part of last year and tossed in an
> > additional third outake fan, (also are now using ball bearing type fans
> > now). Also they inverted the power-supply. To stop heat from escaping the
> > box and getting sucked back in by the intake fan. 
> 
> Do the NEW maxes get this hot? Livingston has 1 small fan in the pm 3 and
> there has even been suggestions that it is not necessary.

They don't get as Hot as before, With the additional fan and the improved
engineering of the K56 Modem cards it is an improvement. Do they run as
cool as the PM3? NO. 


> 
> > A MAX 4xxx w/ K56 Cards will run considerbly cooler than a box w/ V.34
> > cards.
> 
> How much is considerable? Is it no longer a fire hazard?

True, Have you ever read the data sheet on a Max 4004? The operating 
temps spec'd out by Ascend? Here they are:

Operating Requirements : Temperature 32-104 F. {0-40C}

Can you imagine having a fully loaded max run in a room w/ 100.F intake
air, I hope you have halon.

Jason Nealis


> ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~
> 	Jake Messinger             	713-772-6690	jake@ams.com
> 	Advanced Medical Systems, Inc.			jake@uh.edu 
> 	8300 Bissonnet  #400
> 	Houston, Texas  77074           http://www.ams.com/~jake
> ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~
> 

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