Balun-P/S / Balun-B1/B2 G.703 Coax to Twisted Pair

G.703 Balun

A balun is a type of electrical transformer that can convert electrical signals that are balanced to signals that are unbalanced and vice versa. They are also used to change impedance of twisted pair's 120 ohm to coaxial's 75 ohm. An E1 balun's function is generally to convert an E1 carrier signal from coaxial cable to UTP CAT-5 cable.


  • Converts between 75 ohm coax and 120 ohm twisted pair for E1 (2048Kbps)
  • Easy to install
  • No power required
  • Small, light-weight Balun
  • Works in either direction
  • Works for balanced and unbalanced E1


Data rate: 2048Kbps
Unbalanced interface: 75 ohm impedance, 2xBNC
Balanced interface: 120 ohm impedance, 1xRJ-45
Dimensions: Balun-B2/S , Balun-B2/S-2 - 4.4 x 5.4 x 2.5cm (W x D x H)
Balun-B1 - 2.2 x 5.6 x 2.1cm (W x D x H), Balun-P/S , Balun-P/S-2 - 2.2cm x 22.4cm x 2.1cm
Weight: Balun-B2/S , Baluln-B2/S-2 35g, Balun-B1 65g, Balun-P/S , Balun-P/S-2 45g
Compliance: ITU G.703 standard pulse

Live Demo of FRM220 Chassis

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