CL-C3100 gives the interface conversion between G.703 E1 and V.35. This device provides an economical digital access solution for E1 and Fractional E1 network services. With a adapter cable, the Device can link to other DTE Device, such as router, at data rates of 64Kbps to 2048Kbps. User data is placed into the E1 frame, using only the required number of timeslots. Timeslot assignment is accomplished according to the Data Port speed and manual setting of DIP switches. It is widely used in communication network, both in WAN and LAN connection field.