Re: (ASCEND) Ascend Max T1 and FR backup

[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.

Regards,
Randy


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