1.LAN access mode broadband network is actually "IP MAN", it is within the city to IP protocol (Internet Protocol, Internet Protocol) based on the Internet, it is based on a variety of transmission media, the use of TCP / IP protocol as a communication protocol, through the router network, IP packet routing and switching transmission. 2. It is based on multiple transmission media, adopts TCP/IP protocol as communication protocol, and realizes IP packet routing and switching transmission through routers. 2. ADSL Access ADSL (Asymmetrical Digital Subscriber Loop) is a brand new way of accessing the Internet, which is regarded as "modern information technology" by developed countries such as Europe and the United States. ADSL (Asymmetrical Digital Subscriber Loop) is a new way of accessing the Internet, which is regarded as "the express on the modern information highway" by developed countries such as Europe and America. It utilizes a pair of existing copper twisted-pair wires (i.e., ordinary telephone wires) to provide users with asymmetric transmission rates (bandwidth) in the upstream and downstream, with low-speed transmission in the upstream (from users to the network) and high-speed transmission in the downstream (from the network to users). It is due to its high downlink rate, wide bandwidth, excellent performance and other characteristics of the majority of users love, following MODEM, ISDN after another new faster and more efficient access methods.3. Cable Modem access Cable Modem is a widely used in the radio and television system access methods. The use of existing cable television (CATV) network, Cable (coaxial cable) or HFC (Hybrid Fiber / Coax fiber coaxial hybrid) network as a transmission channel, using Cable Modem (cable modem) technology to access the network, its biggest advantage lies in the fast speed, occupies fewer resources, and its downstream transmission rate according to the bandwidth and modulation method can reach 27 to 56Mbit. Different can reach 27 ~ 56Mbit / s, uplink transmission rate can reach 10Mbit / s.
4, wireless access technology wireless access refers to from the switching node to the user terminal part or all of the use of wireless means of access technology, wireless access technology can be divided into two categories of mobile access and fixed access. Mobile wireless access network, including cellular area mobile telephone network, wireless paging network, cordless telephone network, trunked telephone network, satellite global mobile communication network until the personal communication network, etc., is one of the most active areas of the communications industry. Among them, mobile access can be divided into two types: high speed and low speed. High-speed mobile access is generally available cellular systems, satellite mobile communication systems, trunking systems, etc.. Low-speed access systems can be used PGN micro-calls, zones and milli-micro zones, such as CDMA WILLJACS, PHS, and so on, as well as like the mobile GPRS and so on.