Search results
Results from the WOW.Com Content Network
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.
AT&T Computer Systems is the generic name for American Telephone & Telegraph's unsuccessful attempt to compete in the computer business. In return for divesting the local Bell Operating Companies (), AT&T was allowed to have an unregulated division to sell computer hardware and software.
A red box is a phreaking device that generates tones to simulate inserting coins in pay phones, thus fooling the system into completing free calls. In the United States, a nickel is represented by one tone, a dime by two, and a quarter by a set of five. Any device capable of playing back recorded sounds can potentially be used as a red box.
The AT&T UNIX PC is a Unix desktop computer originally developed by Convergent Technologies [2] (later acquired by Unisys), [5] [1] and marketed by AT&T Information Systems in the mid- to late-1980s. The system was codenamed "Safari 4" [6] and is also known as the PC 7300. An updated version with larger hard drive was dubbed the "3B1".
AT&T deliberately transmits a frequency that varies from the ITU nominal; it is about 35 Hz high to signal one set of conditions or about 35 Hz low to signal another set. Similarly, AT&T also modulates the duration of the tone within the ITU limits of 330±70 ms. [1] Using this scheme, AT&T could encode six bits of information, representing 64 ...
AT&T (NYS: T) has just called a flagrant foul against the Federal Communications Commission. It would be an egregious understatement to say the company is angry at the agency for releasing a ...
1. Search your inbox for the subject line 'Get Started with AOL Desktop Gold'. 2. Open the email. 3. Click Download AOL Desktop Gold or Update Now. 4. Navigate to your Downloads folder and click Save. 5. Follow the installation steps listed below.
In telephony, call progress tones are audible tones that provide an indication of the status of a telephone call to the user. The tones are generated by a central office or a private branch exchange (PBX) to the calling party .