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Table B-1. AT Command and S-Register List (23 of 34)
AT
Command/
Description
S-Register
&J n
Transmit Mode
Sets Permissive control mode for transmit level,
overriding any preceding &I command.
&J or &J0
&M n , &Q n
Async/Sync Mode and Computer Dialer Type
NOTE: &M and &Q perform the same function. It
is not necessary to enter both commands.
&M0, &Q0
&M1, &M3 &Q1, or &Q3
&M2, &Q2
&P
Pulse Dialing Make/Break Ratio
n
Sets the relative duration of pulses in Pulse
Dialing mode.
&P0 Make/break ratio is 39 milliseconds to
&P1
Permissive mode
Enables asynchronous operation with
AT command protocol dialing.
Enables synchronous operation with
AT command protocol dialing.
Enables synchronous operation with DTR
dialing method. (Note that the &D
command must be set to &D2.)
61 milliseconds
Make/break ratio is 33 milliseconds to
67 milliseconds
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