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Technology Stocks : The *NEW* Frank Coluccio Technology Forum
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To: ftth who wrote (966)10/7/2000 12:59:49 AM
From: Frank A. Coluccio  Read Replies (1) of 46821
 
We'll likely begin seeing a departure from straight NRZ on-off, 1 and 0 line coding by those who go after still faster speeds. Once someone takes the already-achieved rates of 3.2 Tb/s or a 7 Tb/s, and begins to introduce 4-bit-per-hertz phase- and/or quadrature- encoding schemes, we'll begin seeing claims of 12 Tb/s and 28 Tb/s, respectively, before long. And then it will be 8 or 16 bits per hertz.

We've seen the beginning already with the manipulation of polarization characteristics earlier this week. It's only a matter of time. In which case, if we revert back to analog modem technologies in the optical idiom, the past once again will become prologue. Twenty-five years ago, when T introduced their first Digital Data Service, this is precisely how they did it over their then-extant coaxial long haul plant: They used QAM modems.
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