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What is ADSL

2018-01-03 13:32:49

What's adsl

adsl is what?ADSL is a kind of asynchronous transfer mode (ATM).ADSL refers to use telephone line to the Internet, need special cat (Modem), high frequency and low frequency separation when surfing the Internet, so the Internet phone two don't delay, faster than the ordinary dial a lot, but there is no fiber, is one of the most valuable way of Internet access method, now many families go to the telecom or netcom deal with the Internet also mostly USES the ADSL.

ADSL is actually a kind of asynchronous transfer mode (ATM).ADSL chart on telecom service providers, need to open each ADSL business telephone lines connected to the digital subscriber line access multiplexer (DSLAM).And in the client, users need to use a ADSL terminal (because similar to the traditional Modem (Modem), so also known as The cat "To connect a telephone line.

because of ADSL using high frequency signal, so also is to use ADSL signal separator at both ends to ADSL data signal and ordinary telephone audio signal separation, avoid when calling to noise interference.Usually ADSL terminal has a Phone Line - In, an Ethernet front-end ports, some terminal integrates ADSL signal separator, also provides a connection Phone interface.Some ADSL modems are connected to the computer use USB interface, need to install the specified in the computer software to add a virtual network card for communication.

ADSL chart on telecom service providers, need to open each ADSL business telephone lines connected to the digital subscriber line access multiplexer (DSLAM).And in the client, users need to use a ADSL terminal (because similar to the traditional Modem (Modem), so also known as Throughout the cat &;)To connect a telephone line.Because the ADSL using high frequency signal, so also is to use ADSL signal separator at both ends will ADSL data signal and ordinary telephone audio signal separation, avoid when calling to noise interference.

there is a telephone Line of ADSL terminal - In, an Ethernet front-end ports, some terminal integrates ADSL signal separator, also provides a connection Phone interface.Some ADSL modems are connected to the computer use USB interface, need to install the specified in the computer software to add a virtual network card for communication.

main classification

more mature now there are two kinds of ADSL standard G.D MT and G.L ite.G.D MT is full rate of ADSL standard, support 8 Mbps / 1.5 Mbps high-speed downlink/uplink rate, however, G.D MT request client installation POTS separator, is more complex and expensive;G.L ite standard rate is low, the downlink/uplink rate 1.5 Mbps / 512 KBPS, but eliminating the complex POTS separator, lower cost and ease of installation.In terms of the applicable field, G.D MT is suitable for small or home office (SOHO), and G.L ite is more suitable for ordinary households.

ADSL is one of the many DSL technology is relatively mature, its larger bandwidth, simple connection, small investment, so development soon, the current domestic guangzhou, shenzhen, Shanghai, Beijing, chengdu and other places of broadband operators department has successively introduced a unicom ADSL broadband access services, and regional application is developing quickly, but from a technical point of view, for ADSL broadband only as a transitional method.

adsl (Asymmetric Digital Subscriber Line, Asymmetric Digital Subscriber Line) is a kind of through the existing ordinary HuaXian provide broadband data transmission service for family, office of technology.ADSL is asymmetric digital signal transmission, it can in the existing copper twisted pair, the ordinary telephone lines to provide up to 8 mbit/s high speed downlink rate, {because of ADSL is sensitive to distance and line, with the increase of distance and the deterioration of line, rate be affected} is far higher than ISDN rate;And uplink rate has 1 mbit/s, transmission distance up to 3 km, 5 km.The main characteristic of ADSL technology can make full use of the existing copper network (telephone network), in line with ADSL equipment on both ends to be able to provide users with high broadband service.

ADSL advantage is that it can coexist with ordinary telephone on a telephone line, on an ordinary telephone line to answer, make a phone call at the same time for ADSL transmission and mutual influence.Users via ADSL broadband multimedia information network annex inflammation and the cause of the Internet, you can also use the phone on the same phone line and does not affect more than other activities.Installation of ADSL is extremely convenient, in the existing telephone lines are installed on the ADSL, in addition to outside the client installation of ADSL communication terminal, don't make any changes to the existing lines.Use the ADSL (Asymmetric Digital Subscriber Line, Asymmetric Digital Subscriber Line) technology, through a telephone Line, to one hundred times faster than normal MODEM browsing the Internet, through the network learning, entertainment, shopping, enjoy the advanced data services such as video conference, video on demand, online music, online TV, MTV, has become a reality.

ADSL another advantage is that it can coexist with ordinary telephone on a telephone line, on an ordinary telephone line to answer, make a phone call at the same time for ADSL transmission and mutual influence.User through ADSL broadband multimedia information network and the Internet, can watch the film and television programs at the same time, a video meeting, download data files can also be very high rate, that's not all, you can also use the phone on the same phone line and does not affect these other activities. Installation of ADSL is extremely convenient.In the existing telephone lines are installed on the ADSL, in addition to outside the client installation of ADSL communication terminal, don't make any changes to the existing lines.Use the ADSL (Asymmetric Digital Subscriber Line, Asymmetric Digital Subscriber Line) technology, through a telephone Line, to one hundred times faster than normal MODEM browsing the Internet, through the network learning, entertainment, shopping, enjoy the advanced data services such as video conference, video on demand, online music, online TV, MTV, has become a reality.

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