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To: Sig who wrote (13441)	12/1/2004 1:27:44 AM
From: D.B. Cooper	Respond to of 13815

((Is there no lag whatever between the two events.?)) I am not sure if anyone that reads this board can respond to your question. VBG Don@stillsellingandbanking.com

To: Sig who wrote (13441)	12/2/2004 7:15:52 PM
From: R2O	Read Replies (1) \| Respond to of 13815

I am not to able to see how they do it, attain such speeds Tbps is a measure of oscillations per second. It has nothing to do with speed/velocity of transport. Speed/velocity of transport is always limited (as far as we know) by the speed of light. The speed of 'light' in a wire is really the speed/velocity of the 'wave' being guided by the wire, and is always less (typically 1/2 or so) than the speed of light in a vacuum --- the gold standard. Tbps signals never use a metal wire. They always use light, usually guided by fiber optic cables. Turns out the light moves in the fiber at roughly 1/2 vacuum light velocity. Electrons 'shoved' into one end of a metal wire don't get very far (absent superconductance) --- they simply push other electrons along. Moving electrons generate magnetic fields and changing magnetic fields generate electric fields, both of which interact with matter, slowing down the whole process. The fields turn around and interact with the electrons. The problems come about when you have to deal with all those Tbps. The only way right now to do that is to convert the light into electrical signals (carried by metal wires) and work on the content with ICs. (Work is being done to do all optically, but I would guess a decade or more away from practice). Typical 'standard' rates are about 10^10 bits per second (10Gbits/sec) for each 'wire'. 20Gbits/second is also available. 40Gb/second is possible, perhaps. 100Gbits/second (100Gbps) is 1Tbps, so you might need minimum 10 ICs (connected to the optics) to handle 1Tbps. Plus a whole bunch more to do any constructive processing, like routing, etc. So it could still take a year (or more likely .1 second or so) to get the first bit of your Tera bit from point A to point B. The rest would follow quickly, however.