The ONS15454 SDH FMEC-E1 Front Mount Electrical Connection card provides front mount electrical connection for the fourteen ITU-compliant G.703 E-1 ports of the E1-N-14 card. With FMEC-E1, each E1-N-14 port operates at 2.048MBits/s (Mbps) over a 75-ohm unbalanced 1.0/2.3 miniature coax connector.You can install the FMEC-E1 card in any EFCA (Electrical Facility Connector Assy) slot from slot 18 to 22 or slot 25 to 29 on the ONS 15454 SDH. Each FMEC-E1 card port features E1-level inputs and outputs supporting cable losses of up to 6 dB @ 1024kHz.