User`s guide

AT Commands
Modem 3600 5-5
Numbered Commands
Commands that start with the same letter are distinguished by a number
following the letter.
For example, the M0 command selects speaker always off, M1 speaker
on until carrier detected, and M2 selects speaker always on.
Note
The zero (0) may be omitted; the commands M and M0 are
identical. This manual uses the nonzero form. The modem
treats both the same, but zeros count against the buffer total.
Group Commands
A group of commands can be typed in a single command statement.
Pressing the Enter key sends the entire command string to the modem,
which executes each command individually in the order it appears in the
command statement reading from left to right.
For example, the command statement ATQ0V0L3DT5551212 means
• AT Attention.
• Q Allow response messages to be sent.
• V Select digit code responses.
• L3 Select high volume.
• DT Tone dial 555-1212.
The modem executes the AT command followed by the Q, V, L, D, and T
commands. ATQ0V0L3DT5551212 can be read as
ATQVL3DT5551212. Eliminating zeros reduces the number of
characters, allowing more room in the buffer.
The dial D command initiates the dial process so no other commands,
only dial modifiers, can follow it.
Note
Bold text indicates command parameter defaults.
Response Commands
The modem communicates with the operator through response
messages. These appear on the monitor or a computer printout to show
the result of the command or action executed. Response messages can
appear as words or numbers.