Overview
     MDO-240 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 8E1 (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
Specifications
1、E1 Port
　Data rate: N*64Kbps, N=(1~31)
    Line code: HDB3
    Impedance: 75Ω( BNC)/120Ω(balance) auto-negotiation
    Electric characteristic: comply with ITU-T G.703 standard
    Connector: BNC (75Ω), RJ-45 (120Ω)
    Jittering: comply with G.742 and G. 823 standard
    Frame format: frame, comply with G.704 standard
2、V.35 port
    Data rate: N*64Kbps, N=(1~31)
    Interface Mode: DCE male
    Interface connector: DB25 connector, DCE or DTE are selectable
    Electric characteristic: comply with ITU-T V.35 standard
3、Timing mode: Line clock and Internal oscillator of G.703
4、Power supply Voltage: -48VDC or 220VAC±20%
5、Environment Working temperature: 0°C~50°C
6、Size: Standalone:440mm(W)×150mm(L)×40mm(H)
         Rack Mount:483mm(W)×250mm(L)×270mm(H)

Typical Application
 
Order information
　　 MDO-240 　8E1, 40Km, FC, 75&120ohm, Single mode
　　 MDO-240 　8E1, 40Km, FC, 75&120ohm, Single mode