The 24 E1 - T1 Coax to RJ21 Telco TTR Balun Panel provides 75 to120 ohm conversion for (coax to twisted pair) 24 E1 or T1 channels (Tx and Rx). The panel conforms to ITU-T G.703, matching the impedance and signal characteristics of 48 unbalanced 75 ohm coax connections with 24 balanced 120 ohm twisted pair connections.
Only 1U high, the panel is available with Type 43 (BT), 1.6/5.6 (Small Siemens), Ericsson M4 or BNC coax connectors. The 2 twisted pair connectors are 50 way shielded female RJ21 Telco (Amp Champ) - one Telco for Transmit, one Telco for Receive.
See 24 E1-T1 Balun Panel for an alternative wiring scheme.