Ascend Archive
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Re: (ASCEND) MAX 4000 + 56K modem cards = fire
At 09:25 AM 9/9/97 -0400, you wrote:
>
>
>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.
In an uncooled room, my maxes run about 85F to 90F - warm to the touch... I
do wish they'd run off of a 70watt lightbulb (as do the pm3s).
Chris King - IPA.NET (cking@ipa.net)
Network Engineer (501)785.0300
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