Overview FME Series Fiber Modem can modulate G.703 E1 signal or V.35 signal to single-mode or multimode fiber which extend the transmitting distance of E1 signal greatly.E1 signal support framed and unframed mode.When in framed mode,continuous or discontinuous time-slot can be selected,E1 fiber modem and V.35 fiber modem can be used together.Both of them are widely used in extending uesr interface in ATM or DDN. Features  *Realize E1 or V.35 signal transmitting over fiber;transmitting distance can reach 120Km without repeater *E1 interface:Framed & Unframed optional,75 & 120 ohm seletable *V.35 interface:support N×64K bit rate DTE & DCE optional *Three loop back mode selectable:local loop back,diagnostic loop back,remote loop back *Provide bit-error test and time-slot follow by remote equipment,which brings a lot advantage in setting and debug *Multiple clock selection:Local clock,Fiber line clock,E1 recovery clock,V.35 line clock *Standalone and Chassis optional Specifications Fiber interface Rate:4Mbps Line code:1B1C Wavelength:850nm/1310nm/1550nm Connector:FC/SC/ST Distance:0-120Km V.35 interface Compliant with V.35 standard Rate:n*64Kbps,n=132 Physical connector:DB25 female jack DCE & DTE optional E1 interface Compliant with:ITU-T G.703,G.704,G.823 Rate:2.048Mbps±50ppm Impedance:75ohm unbalanced & 120ohm balanced  Physical connector:BNC for unbalanced & RJ45 for balanced Framed & unframed selectable Support PCM30 & PCM31 Power AC Input:100V240V DC Input:-48V Environment Operation Temperature:050 Operation Relative Humidity:090% Store Temperature:-2065 Store Relative Humidity:095%