Now I'm following up to my own posts. A *polite* hint to manufacturers: 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. We had significant heat dissipation problems with the MAXes when we had them here. In fact, we had to change our racking plan and remove the side panels from both end racks in order to obtain rational flow-through temperature gradients through the chassis. With the end panels in place the operating temperatures of the MAXes were way beyond my comfort level for hardware of this type. IMHO the thermal engineering of the MAX with V.34 modem boards is marginal at best. Using DM12s was better than the original DM8s, but not by a lot. -- -- Karl Denninger (karl@MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin <A HREF="http://www.mcs.net/~karl">http://www.mcs.net/~karl</A> | T1's from $600 monthly to FULL DS-3 Service | NEW! K56Flex modem support is now available Voice: [+1 312 803-MCS1 x219]| 56kbps DIGITAL ISDN DOV on analog lines! Fax: [+1 312 803-4929] | 2 FULL DS-3 Internet links; 400Mbps B/W Internal ++ Ascend Users Mailing List ++ To unsubscribe: send unsubscribe to ascend-users-request@bungi.com To get FAQ'd: <<A HREF="http://www.nealis.net/ascend/faq">http://www.nealis.net/ascend/faq</A>> </PRE> <!--X-MsgBody-End--> <!--X-Follow-Ups--> <HR> <STRONG>Follow-Ups</STRONG>: <UL> <LI><STRONG><A HREF="msg08535.html">Re: (ASCEND) MAX 4000 + 56K modem cards = fire</A></STRONG></LI> <UL> <LI><EM>From</EM>: Jason Nealis <nealis@babylon.erols.com></LI> </UL> <LI><STRONG><A HREF="msg08504.html">Re: (ASCEND) MAX 4000 + 56K modem cards = fire</A></STRONG></LI> <UL> <LI><EM>From</EM>: Phillip Vandry <vandry@Mlink.NET></LI> </UL> </UL> <!--X-Follow-Ups-End--> <!--X-References--> <STRONG>References</STRONG>: <UL> <LI><STRONG><A HREF="msg08486.html">Re: (ASCEND) MAX 4000 + 56K modem cards = fire</A></STRONG></LI> <UL> <LI><EM>From</EM>: ascend@digistar.com</LI> </UL> <LI><STRONG><A HREF="msg08493.html">Re: (ASCEND) MAX 4000 + 56K modem cards = fire</A></STRONG></LI> <UL> <LI><EM>From</EM>: Jake Messinger <jake@ams.com></LI> </UL> <LI><STRONG><A HREF="msg08491.html">Re: (ASCEND) MAX 4000 + 56K modem cards = fire</A></STRONG></LI> <UL> <LI><EM>From</EM>: Karl Denninger <karl@Mcs.Net></LI> </UL> </UL> <!--X-References-End--> <!--X-BotPNI--> <HR> <UL> <LI>Prev by Date: <STRONG><A HREF="msg08497.html">Re: (ASCEND) MAX 4000 + 56K modem cards = fire</A></STRONG> </LI> <LI>Next by Date: <STRONG><A HREF="msg08492.html">AW: (ASCEND) Ascend Patch 5.0ap23?</A></STRONG> </LI> <LI>Prev by thread: <STRONG><A HREF="msg08491.html">Re: (ASCEND) MAX 4000 + 56K modem cards = fire</A></STRONG> </LI> <LI>Next by thread: <STRONG><A HREF="msg08504.html">Re: (ASCEND) MAX 4000 + 56K modem cards = fire</A></STRONG> </LI> <LI>Index(es): <UL> <LI><A HREF="mail16.html#08496"><STRONG>Main</STRONG></A></LI> <LI><A HREF="thrd156.html#08496"><STRONG>Thread</STRONG></A></LI> </UL> </LI> </UL> <!--X-BotPNI-End--> <!--X-User-Footer--> <!--X-User-Footer-End--> </BODY> </HTML>