Re: (ASCEND) Ascend Max T1 and FR backup

["Tim Brown" <tim@sumter.net>]

I have been using Maxen sin '96 and  know about the lack of CPU horsepower
in the 4xxx's as well as the potential power supply problems. I have one Max
that is used for analog dial-up only--it has 6 12-mod cards and 3 CT1's with
no throughput problem. I have another at a remote pop with with 2 CT1's and
FR running off the WAN port (external CSU/DSU) backhauling the traffic to
our main pop, again no thoughput problems. My experience has been with
analog dial-up and I have not seen any throughput problems. I am sure a box
with 3 or 4 PRI's doing mostly digital calls would be a different story.
Tim

-----Original Message-----
From: Peter Lalor <plalor@infoasis.com>
To: ascend-users@max.bungi.com <ascend-users@max.bungi.com>
Date: Monday, May 01, 2000 1:29 PM
Subject: Re: (ASCEND) Ascend Max T1 and FR backup


>>From: Randy Martin <ascend@austintx.net>
>>
>>At 12:18 PM 4/30/2000 -0700, you wrote:
>>>>I use a pipeline 130 with both a T1 and a BRI to feed my max4004
>>>>That way I not only have the automatic switchover to BRI for
>>>>backup up but also  have all 4 t1/pri's on the 4004 available
>>>>for incoming analog and ISDN dialback.
>>>
>>>That is simpler and more reliable as far as the backup goes. However, the
>>>general consensus on the list seems to be that 40xxs are too
>>>processor-limited to handle all four T1/PRIs at once without performance
>>>suffering. Of course, Pipeline 130s aren't exactly held in high regard
>>>either, but I like 'em okay.
>>
>>What you're saying about 40xxs is not entirely true. It's been my
>>experience over the last five years that you can put four PRIs on a 4000
>>without any problems IF YOU FOLLOW A FEW SIMPLE GUIDELINES.
>>
>>- - You will definitely have a problem if you try to run all the PRIs as
>>dialup MODEM PRIs. The power supplies in the MAX won't handle it. You will
>>also run into a cooling problem.
>>
>>- - You can, however, run four PRIs on a 4000 if you run two of them for
>>dialup/dedicated ISDN ONLY and the other two for dialup modems.
>>
>>We've run 4000s this way for years without a single death due to
>>overheating or burnt up power supplies. This only works with the
>>later-model 4000s that have the 20A 5V supply, not the 10A 5V supply.
>
>This is definitely good advice for improving the longevity of a 40xx.
>
>However, what I'm referring to is that people have repeatedly stated
>on this list over the years that 40xxs slow down measurably with all
>four T1 ports in use. I have never used all four ports on a 4000 much
>less attempted to measure any performance hit, but I thought Tim
>might want to know what people were saying before he leaps in. With
>any luck, someone who actually knows the facts on this first-hand
>will leap in shortly and bang us on the head with the gory details.
>--
>
>Peter Lalor           Infoasis
>plalor@infoasis.com   http://www.infoasis.com/
>
>"Where's my burrito?" -- Homer
>++ Ascend Users Mailing List ++
>To unsubscribe: send unsubscribe to ascend-users-request@bungi.com
>To get FAQ'd: <http://www.nealis.net/ascend/faq>

++ Ascend Users Mailing List ++
To unsubscribe:	send unsubscribe to ascend-users-request@bungi.com
To get FAQ'd:	<http://www.nealis.net/ascend/faq>