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RE: PMD Compromise

At the reaches we are talking, dispersion issues far outweigh the problems
of jitter. Unlike most data links, the complexity / cost of the xmtr will
probably exceed that of the rcvr, because of the need to use exotic
external modulation for chirp control.

Unlike SONET, we can simply regenerate signals, since Ethernet lacks the
complex Stratum clocking of the PSTN. The PSTN is optimized to the
requirements of muxing digitized voice signals. Do we really want to create
a matching topology for  datacentric networking?