Catacomm Corporation
Sdn Bhd

Unit E1-29-6, Block E1,
Dataran Prima, Jalan PJU 1/42,
47301 Petaling Jaya,
Selangor, Malaysia.
+603-7803 8228
+603-7803 8228

Metal casing single port balun

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Metal casing single port balun Impedance Converters (Baluns) Interface Converters AD-Net
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In the video below, you can see how we use these baluns in the testing scheme together with our E1 fiber multiplexers. In this setup we need baluns because E1 port on muxes are RJ-48 120ohm, while tester is 75 Ohm BNC type. Baluns are located right on the muxes at the right side


75/120 Ohm impedance matching baluns (G703 balun) allow users to use inexpensive shielded twisted pair cabling in place of expensive coaxial cabling. Especially useful in telecommunication applications for patching at the distribution frame. Units meet CCITT Recommendation G703 and are great for American or European applications.
Supporting E1 data rates to 2.048 Mbps, the AN-IC-M receives 75 ohm signals and converts them to 120 ohm for transmission over a network or reception by a CPE. The signals output by the AN-IC-M  are scaled to match the pulse shape requirements specified by the CCITT G.703 standard. The AN-IC-M  can perform 120 ohm to 75 ohm signal conversion as well, giving the device a dual role.
AN-IC-M has mettalic casing and BNC/RJ-45 connectors are located separate sides, whether the AN-IC  G703 balun version has plastic casing and same side location for BNC & RJ-45.


  • Data Rates to 2.048 Mbps.
  • 75 Ohm Dual Coax to 120 Ohm Twisted Pair G703 balun.
  • Bi-Directional Signal Conversion.
  • No AC Power or Batteries Needed.
  • Male or Female Coax BNC Connectors Available.
  • Ultra-Miniature Enclosure.
  • Metallic casing.
  • BNC & RJ-45 at opposite sides.
  • High quality G703 balun.


Transmission Line:           CCITT G.703 (unstructured)
Data Rate:                         2.048 Mbps
75 Ohm Connection:         Dual coax BNC connectors, male or female (RG 59 or 2002 coax)
120 Ohm Connection:       Shielded RJ-45 jack (standard) or External Terminal Block
Power Supply:                  none required
Link-to-Data Isolation:    500 volts AC/DC
Operating Temperature:  0° to 50°C (32° to 122°F)

Ordering Information

G.703 BALUN 75/120 OHM Female/Male BNC, Mettalic casing


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