How a Modem Makes Its Connection

Modems are controlled by software on your PC using a language called the Hayes command set or AT command set. When a modem is to be dialed, the first command given it is to tell it to go off hookin other words, to open a connection with the phone line. After that, a command tells the modem to dial a telephone number to make a connection.


How the Internet Works
How the Internet Works (8th Edition)
ISBN: 0789736268
EAN: 2147483647
Year: 2004
Pages: 223 © 2008-2017.
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