The fourteen-port ONS 15454 SDH E1-N-14 card provides fourteen ITU-compliant, G.703 E-1 ports. Each port of the E1-N-14 card operates at 2.048 MBits/s (Mbps) over a 120 ohms twisted-pair copper cable (with FMEC-DS1/E1) or over a 75 ohms unbalanced coaxial cable (with FMEC-E1).Each E1-N-14 port features ITU-T G.703 compliant level outputs and inputs supporting cable losses of up to 6 dB @ 1024 kHz. The E1-N-14 card can function as a working or protect card in 1: 1 or 1: N protection schemes. If you use the E1-N-14 as a standard E-1 card in a 1: 1 protection group, you can install the E1-N-14 card in any multispeed or high-speed card slot on the ONS 15454 SDH. If you use the card's 1: N functionality, you must install an E1-N-14 card in Slot 3 (for bank A) or Slot 15 (for bank B). You can group and map E1-N-14 card traffic in VC-12 as per ITU-T G.707 to any other card in an ONS 15454 SDH node. For performance-monitoring purposes, you can gather bi-directional E-1 frame-level information (loss of frame, parity errors or CRC errors, for example).