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Re: exchange point media (was: Re: MAE-EAST Moving? ...)
From: Alex Bligh <amb () gxn net>
Date: Thu, 15 Jun 2000 15:04:17 +0100


i have been suggesting a DACS for many years.  then all one needs is one
channelized oc48 and it's fat city.

As passive DWDM becomes dirt cheap, having a loop carrying to a
redundant optical (wavelength) cross-connect has advantages, like
you can bilaterally upgrade your peering line cards without having
to bother to inform / be bothered by the exchange point (remember
MAE-ATM). I can't see why people would want to put in less than
an OC-3. n x OC-3 + passive DWDM is (I believe) cheaper than OC-48
channelized (per bit per second) for many values of n (i.e. spreading
the DWDM cost across many OC-x's.) - & this will last until 
n x parallel OC-192 is insufficient for bilateral cross connect. By
the time anyone listens to your (good) DACS idea, 2.4Gbps (total)
won't be enough.

-- 
Alex Bligh
VP Core Network, Concentric Network Corporation
(formerly GX Networks, Xara Networks)





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