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Bell 101 modem; Bell 103 modem; Bell 202 modem; Bell 212A This page was last edited on 16 December 2024, at 22:17 (UTC). Text is available under the Creative Commons ...
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 "short haul modem" is a device that bridges the gap between leased-line and dial-up modems. Like a leased-line modem, they transmit over "bare" lines with no power or telco switching equipment, but are not intended for the same distances that leased lines can achieve.
Terminal-emulator software typically allows the user to send Hayes commands directly to the modem, and to see the responses. In this example, the user of computer A makes the modem dial the phone number of modem B at phone number (212) 555-0100 (long distance). After every command and response, there is a carriage return sent to complete the ...
The T-carrier is a hardware specification for carrying multiple time-division multiplexed (TDM) telecommunications channels over a single four-wire transmission circuit. It was developed by AT&T at Bell Laboratories ca. 1957 and first employed by 1962 for long-haul pulse-code modulation (PCM) digital voice transmission with the D1 channel bank.
When a modem is in data mode, any characters sent to the modem are intended to be transmitted to the remote party. [1] The modem enters data mode immediately after it makes a connection. For example, if ATDT5551212 resulted in a phone call that was answered by another computer modem, the modem would report the word "CONNECT" and then switch to ...
Novation's first CAT was an external 300 bit/s Bell 103-standard modem that connected to the phone lines using an acoustic coupler.Like most other acoustically coupled modems, the CAT required the user to dial the desired number on a normal telephone, listening to the call connecting and the eventual presence of an answer tone.
Bell does not charge any additional fees for dry DSL service; previously, there was a charge of $4 per month. Bell charges resellers a monthly fee ranging from $7.25 to $25.10 and a one-time activation fee for dry DSL service. Although Bell still attributes a phone number to a dry DSL line, it cannot be used for phone calls.