The twelve-port ONS 15454 SDH E3-12 card provides twelve ITU-compliant, G.703 E-3 ports per card. Each interface operates at 34.368 MBits/s (Mbps) over a 75 ohms coaxial cable (with FMEC-E3/DS3). The E3-12 card operates as a working or protect card in 1: 1 protection schemes and as a working card in 1: N protection schemes.You can install the E3-12 card in any multispeed or high-speed card slot on the ONS 15454 SDH. Each E3-12 port features ITU-T G.703 compliant level outputs supporting cable losses of up to 12 dB @ 17184 kHz.