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AT Command Summary (continued)
Command
Description
Sr?
Reads value stored in r
Sr=n
Sets register
r
to
n
V0
Returns result codes as numbers
VI
Returns result codes as words
X0
Enables basic result codes (0-4)
I
X1
Enables extended result codes (0-5, 10)
I
X2 Enables extended result codes (0-6, 10)
X3 Enables extended result codes (0-5, 7, 10)
X4
Enables all result codes
Y0 Disable long space disconnect
Y1
Enable long space disconnect
Z0
Software reset; recalls user configuration O
I
Z1
Software reset; recalls user configuration 1
I
&C0 DCD signal always on
I
&C1
DCD signal on when carrier present
&D0
Ignore DTR signal
&D1
Returns to command mode when an on-to-off DTR
transition occurs
&D2 Hangs up and returns to command mode when an
on-to-off DTR transition occurs
&D3
Resets when an on-to-off DTR transition occurs
&F
Loads factory configuration settings
&G0 No guard tone in CCITT mode
&G1
550 Hz guard tone in CCITT mode
&G2
1800 Hz guard tone in CClTT mode
I
&P0
Pulse dial make/break ratio = 39%/61% (US.)
&P1
Pulse dial make/break ratio = 33%/67% (UK.)
Fax/Modem B-5