一、Programme background 

     With the development of big data, cloud computing, e-commerce, e-government and other applications, has become more and more popular among networks. Users have new requirements for access quality and speed. The bandwidth and capacity provided by ordinary distributed computer room can not meet the demand. Repetitive construction wastes a lot of time, manpower, material and financial resources. How to build a secure, reliable, and easy to upgrade and reconfigure the data center in the future has become the focus of every IT manager in the planning, so fiber-to-desktop (FTTD) of the new network, will be more widely used and popular. 
      Compared with the traditional twisted pair transmission network, the optical fiber transmission of has the following advantages 
      1、optical fiber can support longer distance, higher bandwidth transmission. 
      2、optical fiber using optical signal transmission, no electromagnetic leakage, light waves can not run out of the fiber. 
      3、optical fiber communication is not vulnerable to external electromagnetic interference EMI and radio frequency interference RFI, stable data transmission, high transmission bandwidth. 
      4、With the application of 10GBASE-SR, the transmission distance of OM1, OM2 and OM3 optical cable can reach 300 meters in 10 million Ethernet, and the transmission distance of OM4 optical fiber can reach 550m in the future. This greatly reduces the cost of wiring. The traditional twisted pair can only reach 100 meters even at 100 Mbps transmission rate. With the increase of transmission bandwidth, the distance of twisted pair transmission will be shorter. 
      5、 The ambient temperature range is wide, the communication is not charged, and it can be used in flammable and explosive places, and it is safe to use. 
      6、 chemical corrosion resistance, long service life. 
      7、different sheath materials and internal structure, can cope with harsh office environment. 

二、Solution 

      With the development of optical fiber technology, all-fiber transmission network has a tendency to partially replace the cable transmission network, we recommend the implementation of optical fiber network, Gigabit optical fiber to the desktop (FTTD). The server is connected to the switch, and the switch is connected to the router using a 10 G (or 40 G) fiber. Figure A-1 is a sketch of the optical fiber interconnection of data center equipment. 
      Installs the F1002E (or 40 G fiber optic network card) in the server. 
      Inside the terminal computer, installs the G-902E, or G-901E, optical fiber network card. 
      Installs smooth optical fiber module on the Gigabit optical fiber network card port of desktop computer, selects multi-module (G-8501DNL) or single-module (G-3101DNL) according to the need, and the module on the Gigabit optical fiber card is connected with the corresponding optical fiber module on the Gigabit optical port of switch through Gig. 
      Install the optical fiber module on the Gigabit fiber network card of the server computer, select the multi-mode module (H-8310DNL) or single-mode module (H-3110DNL) according to the need, and connect the megabit module (or the megabit optical port on the server megabit fiber network card port) with the corresponding meg. 
Beijing Guangruntong Technology Co., Ltd. adheres to the concept of strengthening the R&D of industrial core technology and cutting-edge technology and transforming it into productive forces, so that China's own national enterprises can support and lead the healthy development of the entire high-end optical industry. R&D and the production of a full range of optical fiber card, optical fiber module, optical fiber jumper, for various industries to provide a complete solution to the optical network interconnection. The optical fiber network card produced by Guangruntong adopts INTEL control chip, which is high-speed, stable and reliable. 

三、Scheme application 

      With the continuous deepening of applications such as audio, video, data, multimedia, etc., the original 100 Mbps access to the desktop can no longer meet the network bandwidth requirements of various applications, and the 1000 Mbps fiber access to the desktop (FTTD) network is quietly born. 
      The price of optical fiber and fiber access equipment is continuing to decline, and the 1000 Mbps FTTD has been used in large enterprises, military, aerospace, government departments and other fields in China.