Modem Control/Dial-up Connections
FP Modem-EU Technical Manual
3.3 Syntax
All Hayes commands (see "Command Tables" on page 68) begin with the ASCII character AT
(Abbreviation for: Attention). These characters are analyzed by the modem, decoding bit rate,
word length and parity of the command string. The modem interprets all successive characters
as commands. After an AT, several commands (max. 58 characters) can be grouped together in
a sequence. The input is terminated by Return/Enter and the command sequence is then sent
to the modem.
The modem confirms with "OK" or with the respective value in case of queries. If the instruction
could not be executed, the modem signals "ERROR".
The AT commands can be entered either in upper case or in lower case, but NOT in
combination. Erroneous inputs can be deleted with the backspace key. The AT characters at
the beginning of the line cannot be deleted.
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