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To: Douglas Nordgren who wrote (20633)	2/7/1999 6:30:00 PM
From: nic	Read Replies (1) \| Respond to of 29386

Distance limitations I've always wondered about that. What is it about ATM or SONET that makes them go farther, if not lower transmission rate? Aren't they all bumping up against the same physical limits when it comes down to the fiber? Don't ATM & SONET trunks have signal reconditioners every x miles (and what is x)? If so, is there any reason why FC couldn't be gotten to work over the same kind of hardware? Apologies for the rampant ignorance on display here... - nic

To: Douglas Nordgren who wrote (20633)	2/7/1999 9:07:00 PM
From: Greg Hull	Read Replies (2) \| Respond to of 29386

Douglas, Thanks for all of the help on SAN/MAN/WAN. <<Distance limitations, remember, current max is 10k.>> Isn't this distance only for single-mode fiber? Haven't the DWM folks solved this problem using erbium doped fiber amplifiers? Are the concerns for SANs (vis-a-vis fiber length) different from telco concerns? A change in the physical layer wouldn't upset the whole cart, would it? There are already several physical layers (copper, multi-mode and single-mode), why not just add another layer for longer distance? Any photonics engineers out there? Greg