100BASE-TX to 100BASE-FX would require PMD de/encoding (-TX uses MLT3) and scrambling/unscrambling, but the PCS is the same 4b/5b.
10BASE-T to 10BASE-FL could be directly adapted, Manchester throughout.
Building that yourself is a major project - in addition to the transmission medium, the line codes can be quite different for fiber and copper: You can buy cheap media converters for connecting e.g. With fiber there's no need to compensate EM noise or to remove direct current, so you can just put a data signal on the core. There is no reference to ground.įor 10BASE-T and 100BASE-TX there's a dedicated pair each for transmitting data and receiving data. Put in another way, each wire is a reference for the other. In the simplest example, Transmit+ > Transmit- (higher voltage level) means 1 and Transmit+ < Transmit- (lower voltage level) means 0. Twisted pair uses differential signaling - in a pair, one wire is always the negative/complimentary signal of the other.
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