Features Advanced and compact design that performs E1 multiplexing & de-multiplexing and provides a 16.896Mbit/s optical interface in a single unit. Built-in AC/DC or DC/DC converter and supervisory microprocessor Digital clock data recovery for E1 signal Provides visible and audible alarm indication Low power consumption Order wire channel for end to end installation and maintenance Auxilary data channel in optical line code Centralized network management with the Topone NMS High reliability Flexible installation in various mechanical constructions.