Re: M13 muxes

When I was at one comm we had over a thousand of them.  Failure rate  
was normal for the age when compared to other hardware

Alex


Sent from my iPhone

On Feb 4, 2010, at 21:11, Jon Lewis <[email protected]> wrote:

> I wanted to ask this on nanog, but I don't know that it's really on- 
> topic
> there.
>
> Are any of you using Widebank28 M13 muxes?  Are we doing something  
> wrong,
> or do the voltage regulators on your controller cards burn out every  
> few
> years?  We have enough of these in service that it seems like every  
> few
> months (sometimes more frequently) we're having to drive to some  
> remote
> POP to swap out controller cards.
>
> Back when Carrier Access was still doing the repairs in-house, they  
> told
> me the cards were dying due to capacitors going bad, and that the
> capacitors had an expected service life of 5 years.  Based on a visual
> examination of bad cards and refurbished ones, I think it's actually  
> the
> voltage regulators on the front edge of the card...that the heatsink
> they're attached to is probably insufficient, or that we should have
> sprung for the optional front covers with fans in them.
>
> I know Adtran makes a similar mux, and we bought a couple of them,  
> but due
> to differences in the layout of the amphenol connectors for the T1s  
> and
> the DC power jacks on the Widebanks and the Adtrans, swapping one  
> brand
> for the other is non-trivial.
>
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>  Jon Lewis                   |  I route
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Eat sushi frequently. - Avi
[email protected] is the human contact address.
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