V. 35 Series optical terminal machine is a optical transmission equipment developed and manufactured by our company using a dedicated integrated circuit developed by our company. This series of equipment is an optoelectronic transmission device composed of ultra-large-scale integrated circuits. According to user needs, it can be selected to provide V. 35 \ E1 interfaces for small-capacity exchange unit networks, user loop networks, mobile communications(base stations), and specialized networks. DDN network and so on.