Low-carbon energy conservation has been valued, and we have bought a lot of peace of mind for our lives. There are six principles for choosing energy-saving lamps for energy-saving lamps. Convenience principle Installation or replacement convenience is one of the principles of choosing a luminaire. I don't think you would like to go through the table, step on the chair, stand at 90 degrees, raise your arms and go over the head to the height of 2.5 meters or even higher to change the bulb. So, choose When lighting, it is best to choose a convenient replacement lamp. Coordination principle The luminaire is the finishing touch of the home decoration. It is the use of lamps to match the overall home improvement environment, not the opposite. Therefore, too complicated or complicated colors or unique styles will not add a finishing touch to the whole home decoration, but it may add to the snake. Energy saving principle Low-carbon energy-saving is the theme of modern home improvement. Selecting lamps with good illumination and energy-saving can not only benefit small families, but also contribute to the global environment. Therefore, choosing energy-saving lamps is a positive trend of new home lamps. Safety principle This is the principle that everyone can't ignore. It is very important to choose the lamps produced by regular manufacturers. For the functional space such as bathroom or kitchen, it is more necessary to choose waterproof lamps that are easy to wipe with moisture and moisture. Functional principle Now only one lighting function can no longer meet people's needs, and intelligence is also reflected in various home lights. Sound control, call control, radiation far-infrared red light with protection of vision, and other new home lights are also needed. It is worthwhile to consider the choice of lamps that make life more comfortable and stylish according to your own needs. Decorative principle In the lighting store, we can easily see that all kinds of home lights are full of styles, no matter the popular crystal lamps or leather lamps, wrought iron lamps, solid wood lamps and various shaped lamps, the variety of materials and ever-changing style can create different homes. Atmosphere. Choosing a decorative home light will make your living room more flavorful and look more sensational. Buying good lamps, dressing up a different living space, happy life will brighten your life. Editor: China Lighting Network Pony There are two types of EPON systems: one is a system that uses 2 wavelengths; the other is a system that uses 3 wavelengths. Epon Wifi Onu,Epon 1Ge Wifi Onu,Epon 4Ge Wifi Onu,Wifi Onu, FTTX solution, HGU ONU Shenzhen GL-COM Technology CO.,LTD. , https://www.szglcom.com
For a two-wavelength system, its downlink wavelength is 1510 nm to transmit downlink voice, data and digital video services; the uplink wavelength is 1310nm to transmit uplink voice and video on-demand and download data request signals. The two-way transmission rate of this system is 1.25 Gb/s, even if the OBD split ratio is 32, it can transmit 20km.
For the three-wavelength system, in addition to the downlink wavelength of 1510 nm and the uplink wavelength of 1310 nm, a transmission window with a downlink wavelength of 1550 nm (1530 ~ 1565 nm) is added. The new window is used to transmit downlink CATV service or DWDM service. The CATV service can be either an analog video signal or an MPEG-2 digital video signal. When the splitting ratio of this system is 32, it can transmit 18 km.
EPON is located between the business network interface and the user network interface, connected to the business node through SNI, and connected to user equipment through UNI. EPON system is mainly composed of optical line terminal (OLT), optical distribution network (ODN) and optical network unit.
In the EPON system, the OLT is not only a switch or router, but also a multi-service providing platform, which provides optical fiber interfaces for passive optical fiber networks. According to the development trend of Ethernet to metropolitan area network and wide area network, OLT will provide 1 Gb/s and 10 Gb/s Ethernet interfaces. In addition to supporting traditional voice, ordinary telephone lines, and other types of T1/E1 interfaces, the OLT also supports SONET connections at ATM, FR, and OC3/12/48/192 rates. The OLT in the EPON can be configured with multiple optical line cards as required to connect with 16 to 64 ONUs. In EPON, the maximum distance from the OLT to the ONU can reach 20 km. If an optical fiber amplifier (active repeater) is used, the distance can be extended.