![]() ![]() If a circuit is presented on coaxial connectors, always use a balun with a matching impedance, eg: 75 to 120 ohm.ĭS1 - T1/E1 converters must be used in pairs, one on each end of the fiber link. The RJ45 side uses the standard pairs: 1 & 2, and 4 & 5. A G.703 Balun is a bi-directional passive device (transformer) that converts unbalanced (75 ohm, BNC) to balanced (120 ohm, RJ45) signals. RJ48 connector will prevent it from plugging into an RJ45 jack.Īn E1 maybe presented on two coaxial connectors (eg, BNC's), one each for TX and RX. Note: An RJ45 connector will fit an RJ48 jack, but the key on an
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