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USRobotics V.34 User Manual

Page 123

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COURIER HIGH SPEED MODEMS

Alphabetical Command Summary C-1

APPENDIX C. ALPHABETICAL COMMAND SUMMARY

Additional command summaries are in Chapter 4, on the
bottom panel of the modem, and in the Quick-Reference Card.

COMMAND SET USAGE

Follow these guidelines:

1. Your software must be loaded and if you are using a

computer, it must be in Terminal mode.
Some communications programs put the computer in
terminal mode automatically when they are loaded.
Others require you to display a communications
terminal screen, press a Function key, or perform some
other operation. Refer to your communications
software documentation for instructions.
In Terminal mode the computer acts as if it were a stan-
dard terminal such as a teletypewriter, rather than a
data processor. Keyboard entries go directly to the
modem, whether the entry is a modem command or
data to be transmitted over the phone lines. Received
data is output directly to the screen.

2. Type commands in either upper or lower case, not a

combination (AT or at—

not At).

3. All commands except A/, A> and +++ are preceded by

the AT (

attention) prefix and are executed with the

Enter/Carriage Return key ().

4. Command length = 60 characters maximum. The

modem doesn't count the AT prefix, Carriage Return
character, or spaces. It counts (but doesn't act on)
punctuation such as hyphens and parentheses.

5. A missing numeric parameter is assumed to be zero, as

in the command to hang up: ATH is the
equivalent of ATH0 .