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To: simonds who wrote (650)	6/10/1998 6:23:00 PM
From: George Dawson	Read Replies (1) \| Respond to of 4808

+simonds, I'm not sure I understand your question. My understanding of the question of protocol independence is that some DWDM devices (like CIEN) regenerate the signal from the incoming optical data. In that scenario they are physical limitations on the transmission rate, but protocol independence because you can retransmit any protocol you want over the WAN. The second scenario is to map the protocol coming in to the DWDM device onto a standard protocol like SONET and send this out over the WAN. The limitation of protocol 1 would seem to be needing a device that can decode specific incoming physical and protocol data (e.g. a different module specific to each protocol.) The limitation of the second scenario would be an edge device that could map the incoming protocol at "wire speed" to the outgoing protocol frames. George D.