Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 67. Chapters: Digital Subscriber Line, Cable modem, Point-to-Point Protocol, Carrier frequency, Wideband modem, Narrowband modem, Acoustic coupler, Hayes command set, Softmodem, Satellaview, Zenith Cable Modem, Hayes Microcomputer Products, Voice modem command set, Telebit, Microcom Networking Protocol, List of ITU-T V-Series Recommendations, Null modem, Novation CAT, Motorola phone AT commands, Command and Data modes, Qualcomm Gobi, Com21, 56 kbit/s modem, DSL modem, Time Independent Escape Sequence, Wireless modem, Nano Ganesh, Freebox, 1-Meg Modem, NO CARRIER, Apple Modem, SupraFAXModem 14400, Remote Access Service, Bell 202 modem, Link Access Procedure for Modems, Microsoft Point-to-Point Compression, V.92, Bell 103 modem, Fax modem, PocketMail, Answer tone, Usrobotics sportster magic string, Connect card, Guard tone, Global Village, Bell 101, MultiMedia Commands, Volksmodem, Modem script, Internet outdial, BT Voyager, Packetized Ensemble Protocol. Excerpt: A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used over any means of transmitting analog signals, from light emitting diodes to radio. The most familiar example is a voice band modem that turns the digital data of a personal computer into modulated electrical signals in the voice frequency range of a telephone channel. These signals can be transmitted over telephone lines and demodulated by another modem at the receiver side to recover the digital data. Modems are generally classified by the amount of data they can send in a given time unit, normally measured in bits per second (bit/s, or bps). The...