RL801GW WIFI GPON ONU device for FTTH





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The communication protocols mainly involved in smart home technology

The current smart home technology mainly refers to communication or control protocols. Professionally, it mainly involves two parts: hardware interface and software protocol. In general, the market is mainly divided into wireless communication, wired communication and power carrier. Wired mode RS485 IEEE802.3 (Ethernet) EIB/KNX LonWorks X-10, PLC-BUS PLC-BUS overview CresNet, AXLink, etc. In addition to X-10, PLC-BUS, there is almost no communication technology specifically developed for the smart home industry. What is interesting is that the X-10 power line carrier technology was successfully developed as early as the 1970s. In the field of application and home automation, it was introduced and promoted in China around 2000, but the market situation has been difficult to open. The main reason why it is difficult to widely promote is that in addition to the equipment cost and people's needs, it is also the various technologies. problem. Why has power line carrier techno...
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OLT、ONU and ODN

OLT : optical line terminal, used to connect optical fiber trunk terminals. ONU (Optical Network Unit) optical node. A device equipped with an optical receiver including an optical receiver, an upstream optical transmitter, and multiple bridge amplifiers is generally called an optical node. ONU function 1. Select to receive broadcast data sent by the OLT; 2. Respond to the ranging and power control commands issued by the OLT; and make corresponding adjustments; 3. The user's Ethernet data is buffered and sent in the upward direction in the transmission window allocated by the OLT. ODN (optical distribution network) Optical distribution network is an FTTH optical cable network based on PON equipment. Its role is to provide an optical transmission channel between the OLT and the ONU. From the functional point of view, the ODN can be divided into four parts: the feeder line subsystem, the wiring system, the subscriber line cable subsystem and the fiber terminal subsystem.
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What is ONU (Optical Network Unit)

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When it comes to ONU (Optical Network Unit) , we first introduce PON technology. PON technology has been developed since the 1990s. ITU (International Telecommunications Union) started from APON (155 M) and developed BPON (622 M). ), and to GPON (2.5 G); at the beginning of this century, due to the widespread use of Ethernet technology, IEEE has also developed EPON technology in Ethernet technology. Currently, PON technologies for broadband access mainly include EPON and GPON. The two standards are different. The EPON uplink and downlink bandwidth is 1.25 Gbit/s, the GPON downlink bandwidth is 2.5 Gbit/s, and the uplink bandwidth is 1.25 Gbit/s. The higher bandwidth in the future will be the 10 G EPON/10 G GPON developed on EPON/GPON technology. PON is a single-fiber bidirectional optical access network using a point-to-multipoint (P2MP) structure. The PON system is composed of an optical line terminal (OLT), an optical distribution network (ODN), and an optical network unit (ONU) on...
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