Views: 0 Author: Site Editor Publish Time: 2020-10-20 Origin: Site
OLT and Switch as optical network transmission equipment, the difference between them has been widely concerned,Today HSGQ will explain it in detail.
1.what is OLT and ONU
First, the OLT is an optical line terminal, and the ONU is an optical network unit (ONU), which are all optical transmission network connection devices. It is a must-have module in NPO: PON (Passive Optical Network). PON (passive optical network) means that (optical wiring network) does not contain any electronic devices and electronic power supplies. The ODNs are all composed of passive components such as splitters, and do not require expensive active electronic devices. A passive optical network includes an optical line terminal (OLT) installed at a central control station, and a group of supporting optical network units (ONUs) installed at the user’s premises. The Optical Distribution Network (ODN) between the OLT ONU contains optical fibers as well as passive optical splitters or couplers.
2.Router and Switch
A router is a device that connects to various local area networks and wide area networks in the Internet. It automatically selects and sets routes according to the channel conditions, and sends signals in the optimal path in order. The router is the hub of the Internet, “traffic police.” At present, routers have been widely used in various industries, and various grades of products have become the main force for realizing internal connections of various backbone networks, interconnecting backbone networks, and backbone network and Internet interconnection services.
The main difference between a route and a switch is that the switch occurs at the second layer (data link layer) of the OSI reference model, and the route occurs at the third layer, the network layer. This difference determines that routing and switches need to use different control information in the process of moving information, so the way they implement their respective functions is different.
These are the differences between OLT,Router and Switch，do you understand it？
