Modem User Manual

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Modem 34336
• Command Sequence. For dialing, a command line begins with AT,
followed by a D and the phone number. Other commands should be
placed before the dial command—or after the dial command if it is
terminated with a semicolon. See the example below:
AT M2 V1 D 555-1212; S2=1O
The above command instructs the Modem to keep the speaker on (M2),
send word result codes (V1), dial (D) 555-1212, end dial command, set
register 2 to 1 (S2=1), and go on-line and wait for carrier (O).
Characters not in the command set are ignored during the dial
command. Therefore, you can include punctuation or spaces in
the telephone number for easier reading. See the example below:
AT DT 9,[phone] or
AT DT 9, 212 555 1234
• A/ Command. Repeats the commands included in the previous command
line. Because the AT is also repeated, no AT is needed to begin this
command, nor is a carriage return needed. A/ is useful for redialing
a telephone number.
• Backspace Key. The backspace key deletes the last character entered
(provided there is no intervening carriage return) and is used for simple
editing.
• Carriage Return [CR]. A carriage return is required at the end of a
command line. The modem will not execute a command without it. A
carriage return is sent from the DTE keyboard. A period, which may be
entered via the modem’s front panel (PHONE LCD screen), has the same
function as a carriage return. (On most keyboards, the carriage return
[CR] key is labeled Enter or Return.)