What Are The Similarities Between Switched Ethernet Networking And PON Networking

What are the similarities between switched Ethernet networking and PON networking 1) The central office needs large-capacity aggregation equipment. The LAN mode is aggregation plus switch, and the PON mode is OLT equipment. 2) A convergence point is needed in the middle. The LAN mode is a campus aggregation or building aggregation switch, and the PON mode is POS. 3) Provide users with 10/100Mbit/s Ethernet interface. In the LAN mode, the corridor switch provides a 10/100Mbit/s Ethernet electrical interface, and in the PON mode, the ONU provides a 10/100Mbit/s Ethernet interface. 4) Both methods need to occupy fiber optic cable resources. difference: 1) Traditional LAN mode occupies two-core optical cable, and PON occupies single-core optical cable. 2) The traditional LAN mode requires multi-level aggregation switches, and PON uses passive optical splitters. 3) The traditional LAN mode has multi-level convergence, and the complexity of the hierarchy results in low bandwidth utilization, while the PON mode has a simple hierarchy and high bandwidth utilization. The main driving force affecting the development of communication technology is cost and bandwidth, that is, the investment per unit bandwidth is the decisive factor. Compared with LAN access technology, PON not only saves optical fiber resources, but also the active equipment that saves time between the central office and the user end, is simple to maintain and highly reliable, thereby reducing overall network costs. FTTB's networking solution integrates the advantages of Ethernet and PON networks, and saves many problems in pure Ethernet, such as equipment and network management, equipment power supply, and bandwidth expansion. Therefore, it is an ideal Ethernet access solution that can meet the requirements of carrier-class operation. 3. Investment comparison Under the same user conditions, there are only optical passive components such as optical fiber and optical splitter between the central office (OLT) and the user (ONU) in the PON+FTTB mode. There is no need to rent a computer room, no power supply, and no active equipment maintenance. personnel. Therefore, the construction cost should be reduced by at least 20%, and the subsequent maintenance cost should be reduced by 50%; The LAN mode requires the construction of a computer room, the establishment of an independent power supply and maintenance personnel, and the relative operation and maintenance costs are much higher than the PON mode. From the above analysis, it can be seen that the use of PON technology to achieve symmetrical data transmission has a natural restriction on broadcasting and conflict mechanisms, which satisfies operators to provide users with 1M-1GE bandwidth according to flexible tariff models, while DBA (database management) technology greatly improves bandwidth Utilization rate Provide access capability with a radius of 20km, greatly improve the coverage area, and completely solve the broadband access problem in remote areas; A large number of backbone optical fibers and optical transceivers are formed; network passive equipment, power saving, anti-theft, lightning protection, no need for two-layer aggregation switch investment, no need for computer room construction, high reliability, and significantly reduced maintenance costs; Simplified network hierarchy, flexible networking, and rapid deployment are the advantages of PON over traditional LAN access. to sum up: PON networking mode PON eliminates the active equipment between the central office and the user end, which makes maintenance simple, high reliability, and low cost; strong scalability, seamless management of the whole network, in operation, maintenance and operation Upgrading is much simpler than switches. PON only needs to expand the equipment at both ends of OLT and ONU to achieve rapid upgrade of access bandwidth. Ethernet needs to be replaced and upgraded step by step, which is costly and consumes a lot of manpower and material resources. With the development of EPON/GPON technology and the country's promotion of Internet technology, PON networking will be widely used in more and more fields.