Hello,
Today, I would like to share with you 120 ohm and 75 ohm E1 cable butt.
At the project site, there is an E1 service between the transmission SDH equipment and the wireless BSC/BTS/DBS, and an E1 cable between the transmission and the wireless equipment needs to be laid. However, the E1 cable on the SDH device side is configured with an impedance of 120 ohm E1 cable, and the E1 cable on the wireless BSC/BTS/DBS device side is configured with an impedance of 75 ohm E1 cable. The two cannot be directly implemented using the BNC interface docking.
The E1 cable of the OSN 3500 transmission equipment is 120 ohm, as shown in the figure below:

The E1 cable of the wireless equipment BSC/BTS/DBS is 75 ohm, as shown in the figure below:

A 120 ohm cable and a 75 ohm E1 cable cannot be directly connected with a BNC connector. A 120 ohm to 75 ohm adapter is needed in the middle. The 120 ohm connector is an RJ-45 crystal plug, and the 75 ohm connector is a BNC connector. .
The picture of the adapter is as follows:

You are welcome to leave a message and exchange in the comment area. Thank you!



