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    MDO-480 series PDH (Plesiochronous Digital Hierarchy) which was used in exchanger for long distance transmission, and platform of mobile telecommunication, pager transmission station ect., which was used in mini-medium column and point to point products with fiber supporting, the equipment adopted powerful function and expert digital repeating-connection chips which integrated all digital and logical function in the equipment so that improved the performance and reduced the cost of products, the completed-equipment with good performance, stable operation, low loss, strong integration capacity, small bulk, easy installation and maintenance.

Features
　◆ Favorable optic/electric specification provided by integral optic reception/transmission module
　◆ Offering 16E1 (2.048Mbps) interfaces
　◆ E1 Line code: compliant to G.703, E1 interface adopt digital phase locked and clock extracted technique 
　◆ An official phone interface is optional, not occupy E1 channel
　◆ Offering an asynchronous data-transmitting RS232 interface and a management RS232 interface
　◆ Perfect alarm function display remote status
   ◆ up to 120Km distance without repeater
　◆ Complete alarming function
　◆ Single-board architecture design