Your question revolves around two other, but related questions: Zac67 did a great job of answering it, but I'd like to give my own take on it. As Criggie has pointed out, using a modular transceiver (SFP) with a decent switch is preferable to an external media converter. 1000BASE-T to 1000BASE-LX requires complete PCS transcoding (-T uses four-dimensional PAM5 & scrambling -X uses straight 8b/10b).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. It’s good installation practice to keep the cable runs as short as possible and avoid unnecessary excessive cable service loops.Twisted pair uses differential signaling - in a pair, one wire is always the negative/complimentary signal of the other. Anything over this distance will introduce interference and losses on the cable, which will be seen as errors, dropped traffic packets, and reduced throughput. This includes 5m of patch cables at either end of the cable run, so the fixed cabling’s actual distance is 90m. The recommended maximum length for any structured cabling is 100m. VSAT Satellite Training What is the Maximum Length of an Ethernet Cable?
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