The baud unit denotes symbols per second, or the number of times per second the modem sends a new signal. For example, the ITU-T V.21 standard used audio frequency-shift keying with two possible frequencies, corresponding to two distinct symbols (or one bit per symbol), to carry 300 bits per second using 300 baud.

Feb 1, 2011 · The 300-baud modem was the first to integrate its own command set–one that became an industry standard. Using a series of ASCII strings sent to the modem through its RS-232 serial port, users...

May 24, 2022 · The Smartmodem seemed modest at the outset: just 300 baud and adhered to the old Bell 103A standard. But what made it special was that it introduced a command set that could be used by the computer to control the modem.

The Bell 103 modem or Bell 103 dataset was the second commercial modem for computers, released by AT&T Corporation in 1963. [1][2] It allowed digital data to be transmitted over regular unconditioned telephone lines at a speed of 300 bits per second. It followed the introduction of the 110 baud Bell 101 dataset in 1958.

Mar 2, 2022 · The Commodore 1660, also known as the “Modem/300”, is Commodore’s first full-featured modem: It connects directly to the phone line and supports pulse and tone dialing for 300 baud duplex connections.

Dec 26, 2009 · It was in 1962 that the first commercial modem, the Bell 103, was released by AT&T. Including full-duplex transmission, frequency-shift keying (FSK) and a speed of 300 bps (baud).

Apr 26, 2016 · 300 Baud systems were the first electronic systems, and could stop without an extra stop bit, which increased speed by nearly 10%. The signals were modulated by FSK between two frequencies for transmit, and two for receive.

Nov 30, 2024 · Just three years later in 1962, the Bell 103 type was offering full-form models with speeds of 300 bit/s, nearly three times the previous model. The Bell 103 modem became the standard, and non-AT&T models were also producing full-form modems to transmit data.

The VICmodem was a 300 baud modem that did not require the use of an acoustic coupler and telephone handset. Like the Commodore modem/300 Model 1660, it was a pulsed modem, requiring the computer to create the touch tones which were fed into the telephone lines by way of a cord that bypassed the handset.

Apr 1, 2000 · If you are reading this article on your computer at home, it probably arrived via modem. In this edition of HowStuffWorks, we'll show you how a modem brings you Web pages. We'll start with the original 300-baud modems and progress all the way through to …