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V.29 is an ITU-T recommendation for a modem, allowing 4.8 kbit/s, 7.2 kbit/s and 9.6 kbit/s transfer modes (PSK and QAM modulations). V.32 (11/88) is an ITU-T recommendation for a modem operating as full-duplex on a 4-wire circuit, or half-duplex on a two-wire circuit, allowing bidirectional data transfer at either 9.6 kbit/s or 4.8 kbit/s at a ...
X.25 is an ITU-T standard protocol suite for packet-switched data communication in wide area networks (WAN). It was originally defined by the International Telegraph and Telephone Consultative Committee (CCITT, now ITU-T) in a series of drafts and finalized in a publication known as The Orange Book in 1976.
Telenet was an American commercial packet-switched network which went into service in 1975. [1] [2] It was the first FCC-licensed public data network in the United States. [3] Various commercial and government interests paid monthly fees for dedicated lines connecting their computers and local networks to this backbone network. Free public ...
Telenet launched Telenet Digital TV interactive television on its cable television network on 3 September 2005. Since 2012–2013 cable customers need not pay an extra subscription to receive digital TV, but they must purchase or rent a set-top box in order to view the digital TV channels and to use the interactive services based on the ...
Dial-up Internet access is a form of Internet access that uses the facilities of the public switched telephone network (PSTN) to establish a connection to an Internet service provider (ISP) by dialing a telephone number on a conventional telephone line which could be connected using an RJ-11 connector. [1]
When the modem wants the computer to temporarily pause so the playback can catch up, it temporarily lowers the CTS (Clear to Send) signal on the RS-232 serial port. The modem re-raises the signal in time for the computer to resume sending audio data before the playback buffer becomes completely empty.
The farther away from the switching center the modem is, the longer the telephone wires, the weaker the signal, and the lower the data rate that the modem can achieve. Users in cities, close to switching centers, may have access to higher rate service, up to 24 Mbit/s. [2] The distance limit for ADSL is 18 000 feet (5.5 km or 3.4 miles). [2]
User at modem A issues a dial command: AT-Get the modem's ATtention; D-Dial; T-Touch-Tone; 12125550100-Call this number RING: Modem A begins dialing. Modem B's phone-line rings, and the modem reports the fact. ATA: Computer at modem B issues answer command. CONNECT: CONNECT: The modems connect, and both modems report "connect".