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  2. Category:Bell System modem standards - Wikipedia

    en.wikipedia.org/wiki/Category:Bell_System_modem...

    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 ...

  3. AT&T Computer Systems - Wikipedia

    en.wikipedia.org/wiki/AT&T_Computer_Systems

    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.

  4. Modem - Wikipedia

    en.wikipedia.org/wiki/Modem

    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.

  5. Hayes AT command set - Wikipedia

    en.wikipedia.org/wiki/Hayes_AT_command_set

    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 ...

  6. T-carrier - Wikipedia

    en.wikipedia.org/wiki/T-carrier

    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.

  7. Command mode and Data mode - Wikipedia

    en.wikipedia.org/wiki/Command_mode_and_Data_mode

    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 ...

  8. Novation CAT - Wikipedia

    en.wikipedia.org/wiki/Novation_CAT

    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.

  9. Bell Internet - Wikipedia

    en.wikipedia.org/wiki/Bell_Internet

    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.