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Posted by Rich Piehl on September 18, 2007, 10:07 pm
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> On Sep 17, 2:26 pm, Rich Piehl
>> seedofconspiracy wrote:
>>> Or is it typically up to the customer? Just wondering. Thanks.
>> I've seen it both ways. In what kind of application?
>>
>> Take care,
>> Rich
>>
>> God bless the USA
>>
>> --
>> I reject your reality
>> and substitute my own.
>>
>> -----Adam Savage
>
> Thanks. We're using Global Crossing as our IXC. They interface with
> our LEC (ILEC) AT&T. The application is voice/PBX. Currently, our
> smartjacks are in our server room with a ~7ft ethernet cable going
> directly to our PBX (no CSU in the middle). It's a very short
> distance and as far as I'm reading, somewhat abnormal in the fact that
> the smartjack is in the same room as the PBX. We've been having
> chronic d-channel failures in the past few months (4 times so far,
> length of outage varies, on both PRIs, none of which happened before
> we moved from XO Communications to Global Crossing). No one can
> figure out what is causing the problem.
>
> In any case, I was just making a case to add a couple CSU's to the
> budget (it may or may not fix the problem mentioned above). As far as
> I see, they may not be necessary, but it's somewhat highly
> recommended. Similar to placing a UPS in between your server and the
> wall for power conditioning.
>
Another aspect of the CSU is if there is a large distance between the
smart jack and the equipment some CSU's can provide a degree of
amplification. Similarly if the signal is too hot a CSU can be set to
attenuate it.
Take care,
Rich
God bless the USA
--
I reject your reality
and substitute my own.
-----Adam Savage
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