Introduce of PDH Multiplexer
The Plesiochronous Digital Hierarchy (PDH) is a technology used in telecommunications networks to transport large quantities of data over digital transport equipment such as fibre optic and microwave radio systems. The term plesiochronous is derived from Greek plēsios, meaning near, and chronos, time, and refers to the fact that PDH networks run in a state where different parts of the network are nearly, but not quite perfectly, synchronised.
PDH optical multiplexer is a kind of point-to-point optical transmission equipment developed based on ultra large scale integrated circuit. Have perfect alarm function, data office telephone optional, high reliability and stabilization, low power consumption, high integration, small bulk, easy installation and maintenance. The device is popularly with telecommunication operator. It is suitable in business for communication operator, government and kinds of entities.
PDH Multiplexer refers to design of highly integrated structure and provides 16 standard E1 interfaces together with one channel of order wire, with self-contained alarm and NM functions,as well as self-testing and E1 loop-back testing functions.Alarm signals are provided in a full range,including LOS,LOF,10-3 error code,and 10-6 error code alarms of line side as well as LOS and HDB3 coding violation alarms of E1 bypass,and available with sound alarming signals. All performances have been satisfactorily designed,so that it has become a steady and reliable NG transmission product,nice in appearance and delicate,economical and practical,with good transmission performance. Transmission impedance can be matched through simple contact pin and patch cord or DIP switch setting,and at the same time different adapters can be selected to adapt to different interfaces.The product can be applied to construct economical and flexible multi-service transmission networks,used for relay between switch offices,data transmission of LAN,2M access of lease service for key clients,voice cutover for residentical areas/intelligent buildings,and connection of base stations and other various digital transmission networks.
N*E1 PDH Fiber Optic Multiplexers use the PDH fiber transmission technologies.The 2M (E1) interfaces can connect with the exchanger, light loop device and multi-diplexer directly to form the micromini or the special network. Complete alarm function for N*E1 PDH Fiber Optic Multiplexers, it is stable, easy to maintenance and install, small in size. It can support one digital service telephone.Ingellen manufacture E1 Fiber modem, 4E1, 8E1, 16E1 Fiber Optical Multiplexer and Chassis.
Ingellen PDH Multiplexers are E1 point-to-point optical transport equipments that use the FPGA chips and easy to upgrade. It is single board structure, and the largest transmission capacity is 16E1. The outer design use the standard 19 inches rack, so the volume is little, weight is light, the operation is convenient and credit.
Source: http://www.fiber-optical-networking.com/introduce-of-pdh-multiplexer.html
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