... core. It supports multiple E1 interfaces, very suitable for small-capacity switch networking, user loop line network, mobile communications ( ... Optical interface parameter Optical wavelength 850/1310nm for multi-mode fiber, 1310/1550nm for single-mode fiber. Optical interface SC/FC ... Transmission distance multi-mode 2 Km, single-mode 40 Km, single-mode 80 Km,single-mode 120 Km Jitter tolerance according ...