有机硅改性聚氨酯:如何上网(英文300字)

Stir the number connects to go into(Modem) beyond all doubt, nowadays our country the most universal family network connect into a way be a MODEM to stir number to get to the Internet, have already broken through longer time in the our country because of stiring the business that the number get to the Internet, is a circuit regardless up, be still the technique maintenance up, opposite more mature, the speed also compared to have a very great exaltation before, charge is not expensive either, especially original of 163 with 169 realizations combine net after, our local Internet resources is finally can with together share of the abroad.So says customer in the most suitable whole family court get to the Internet a method, the non- MODEM 莫 belong to.

A glimmer of a glimmer of is the Chinese net releases after stiring number to get to the Internet way of another a kind of in keeping with family customer get to the Internet way.The ISDN(narrow take a comprehensive numerical business net) is a foundation development in IDN since then.The scope that it support is very extensive, can provide the words sound business not only, and can provide various telephone communication businesses, such as data,picture and fax...etc..Customer can just at need of time just connect into a network, can also carry out a special line to connect into a service directly.The ISDN is a standard customer network to connect for what customer provide, making a rightness of common customers lines can link 8 terminals at most, but provide the comprehensive service of various correspondences for several terminals, becoming real"a glimmer of" thus.

Chinese name right and wrong of the customer special line(ADSL) ADSL symmetry and numerical customer special line.It delivers to lie quality, but has a very high bandwidth but gets a quick development because of using common telephone line conduct and actions.With the ISDN dissimilarity, the ADSL used the 26 KH Z later high 频 to take, just providing very high speed, after the ADSL MODEM coding signal of empress to spread to the telephone bureau through a telephone line identify through a signal again/separate a machine, if is the speech signal to spread to the telephone commutation on board, if is a numerical signal to connect into Internet.The ADSL can carry out a real on-line video frequency service.The customer need to mount the ADSL power supply and then can enjoy a high-speed on-line surfing to serve, and can make a phone call in the meantime.

Stir the number connects to go into(Modem),a glimmer of,the customer special line(ADSL) the etc. family get to the Internet the way all canned arrive to consult with or carry out with 219 business halls before the station.
So, your network life from start here......