The Balun-B2S device allows conversion of E1 signal from balanced to unbalanced and back. BNC 75ohm interface is passively converted to 120 balanced twisted pair copper. Balun-B2S converts two female BNC's into a complete E1 RJ48c 120ohm interface.

Features of Balun-B2S
Conversion between dual female BNC coax 75ohm and RJ48c twisted pair 120ohm
Low cost, compact and light design
No power required

Technical specifications
Connectors: two female BNC connectors one RJ48c shielded
RJ48c pin assignment: P1(+), P2(-)/ P4(+), P5(-)