RAD BE-1/M, Coax To Twisted Pair Converter/Balun For E1, BNC MaleCondition:* New Surplus Stock, In OEM Packaging. Open Box. As Pictured.Additional Notes:* Enables any E1 equipment with coax interface to operate over two twisted pairs (4-Wire interface)* Insensitive to the direction of the signal, allowing transmit and receive lines to be reversed without affecting operation.* Operates Without AC or DC power* Data Rate: 2.048 Mbps* Unbalanced Impedance: 75 * Unbalanced Connectors: 2x BNC Male* Balanced Impedance: 120 * Balanced Connector: RJ-45, 8-Pin* Dimensions (LxWxH): 2.0″ x 2.0″ x 0.9″ (50mm x 50mm x 24mm)* Operating Temperature: 32-122F (0-50C)* Humidity: Up to 90%, Non-CondensingRADBE-1/M