What is the recognised impedance for twisted pair?

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What is the recognised impedance for twisted pair?

Twisted pair is a balanced transmission line, meaning the signal is carried as equal and opposite voltages on two conductors rather than referenced to ground. For data networks using twisted pair, the standard characteristic impedance is 100 ohms. This impedance matches well with the differential inputs of transceivers and patch panels, helping to minimize reflections and preserve signal integrity over typical cable lengths. Other media use different impedances—coaxial cables are common at 50 ohms or 75 ohms and are unbalanced, while 120 ohms isn’t the standard for twisted pair. So the recognized impedance for twisted pair is 100 ohms balanced.

Twisted pair is a balanced transmission line, meaning the signal is carried as equal and opposite voltages on two conductors rather than referenced to ground. For data networks using twisted pair, the standard characteristic impedance is 100 ohms. This impedance matches well with the differential inputs of transceivers and patch panels, helping to minimize reflections and preserve signal integrity over typical cable lengths. Other media use different impedances—coaxial cables are common at 50 ohms or 75 ohms and are unbalanced, while 120 ohms isn’t the standard for twisted pair. So the recognized impedance for twisted pair is 100 ohms balanced.

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