Several common broadband connection modes of video conference network lines (1)

Broadband network is actually IP MAN, which is the Internet based on IP protocol (Internet Protocol) in the city. It is based on various transmission media, adopts TCP/IP protocol as communication protocol, and realizes IP packet routing and exchange transmission through router networking.

At present, the access modes of IP MAN are generally divided into LAN access (network cable) and FTTX access (optical fiber): LAN access refers to pulling the network cable directly from the nodes of MAN to users' homes through switches and hubs. Its advantages are mature LAN technology, cheaper network cable and intermediate equipment, and smooth transition of 1M, 10M and 100M.

FTTX access refers to pulling the fiber directly to the user's home (FTTH fiber to the home) or computer (FTTD fiber to the desktop). Due to the high price of optical fiber network products, it has not yet reached the popularization stage, but its unlimited bandwidth capacity is the development direction of broadband networks in the future. At present, optical fiber is mainly used for the connection between backbone network and nodes.

2.ADSL access

ADSL (Asymmetric Digital Subscriber Loop Asymmetric Digital Subscriber Loop) is a brand-new way to access the Internet, which is praised as the express train on the modern information superhighway by developed countries such as Europe and America. It uses the existing copper twisted pair (that is, ordinary telephone line) to provide users with asymmetric transmission rate (bandwidth) between uplink and downlink, and the uplink (from user to network) is low-speed transmission; Downlink (from network to user) is high-speed transmission. Because of its high downlink rate, wide bandwidth and excellent performance, it is deeply loved by users and becomes a new, faster and more efficient access mode after MODEM and ISDN.

One-line multi-purpose You can surf the Internet and make phone calls at the same time, without affecting each other. Low cost. It belongs to the private line internet access mode, so you don't have to pay the phone bill to surf the internet, saving money. Simple installation. You can directly use the existing subscriber telephone line without applying for additional lines. You only need to install an ADSLmodem and a telephone separator on the client and a network card on the computer. Widely used.