A set of standard instructions used to activate features on a modem. The code AT is short for ATtention, and precedes most of the modem commands.
The set of commands which is used to control the operation of a modem is called the standard Hayes AT Command Set. Most of the commands are prefaced with an AT which stands for ATtention.
The modem command set developed by Hayes, Inc. that has become the de facto standard for programming modems.
An industry standard set of commands beginning with the letters "AT" that are used to control a modem. Example: ATDT tells the modem to dial (D) using touch-tone dialing (T). ATDP specifies pulse dialing (P). Also referred to as the "Hayes Command Set".
The set of industry-standard commands used to control the modem. Each command line must start with the two-character attention code AT (or at).
This is a language that enables PC communications software to get an asynchronous and "Hayes-compatible modem" to do what you want. It is the language that controls and configures your modem. It instructs your modem to perform a wide variety of tasks such as dialing when certain commands are entered. It is supposedly called AT because the commands get the ATtention of the modem.