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Chapter 4—AT Commands, S-Registers, Result Codes
to ten command character. Then press ENTER. Used
mostly to issue hangup command: +++ATH<cr>.
Command: %%%AT<cr>Remote Configuration Escape Sequence
Values: n/a
Description: Initiates remote configuration mode while online with
remote modem. The remote configuration escape
character (%) is defined in register S13.
Controlling DTMF Functionality
with the command +FCLASS=
The +FCLASS= command controls DTMF functionality and is used as
follows.
1. Enter the command AT+FCLASS=8 <cr> to the modem.
2. Call into modem with phone. A >r (arrow r), incoming ring
indication) is displayed, followed by OK . The modem is now in
Online Voice Command mode, allowing DTMF characters to be
passed through from the remote phone. The characters is
displayed as shown below:
AT+FCLASS=8
OK
R is Ring
/
I ~
The Data link escape character (>), and the start of DTMF tone
shielding character (/) are both output once a button is pressed. The
DTMF digit will continue to be output along with a > until the button is
released, then another > is output along with a DTMF transitions to
off (~) character. Silence on the line is indicated with a (>s) displayed.