4E1 PDH Multiplexer can multiplex 4E1 signals in one fiber channel to transmit. Itis suitable for low capacity, point-to-point application of remote transmission.The circuit part of the equipment is fully digitized. The whole equipment isreliable, stable, easy to install and maintain. It has good temperature and voltagecharacteristics, complete alarm functions.Features1. Advanced and compact design that performs E1 multiplexing & de-multiplexing. 2. Built-in AC/DC or DC/DC converter and supervisory microprocessor 3. Digital clock data recovery for E1 signal 4. Provides visible and audible alarm indication 5. Low power consumption 6. Order wire channel for end to end installation and maintenance 7. Auxilary data channel in optical line code 8. Centralized network management with the Topone NMS 9. High reliability 10. Flexible installation in various mechanical constructions. s Optical interface features Optical fiber type SM optical fiber : 8.3/125 , 8.7/125,9/125, 10/125 producing area:Shenzhen payment:T/T supplying capacity:100000pcs/year