What Does AT Command Set Mean?
The AT command set is a command language with a series of short text strings, which combine together to output complete commands for different operations such as hanging up, dialing and changing connection parameters for modems. A majority of personal computer modems follow the AT command set specifications.This term is also known as Hayes command set.
Techopedia Explains AT Command Set
The AT command set is a standard developed by Hayes to control modems. AT stands for attention. A string holds multiple AT commands placed together, which optimally prepares the modem to dial out. Such strings are called initialization strings and are of the form AT&F&D2&C1S0=0X4. The V.250 specification requires all data communications equipment to accept bodies of at least 40 characters of concatenated commands. The AT command sets are generally divided into four groups:
