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AT Command Summary (continued)
Command
Description
X4
Enables all result codes
Y0
Disable long space disconnect
Y1
Enable long space disconnect
Z0
Software reset; recalls user configuration 0
Z1
Software reset; recalls user configuration 1
&C0
DCD signal always on
&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 CCITT mode
&P0
Pulse dial make/break ratio = 39%/61%(U.S.)
&P1
Pulse dial make/break ratio = 33%/67%(U.K.)
&V
Display configuration values and dialog settings
&W0
Save storable parameters as user configuration 0
&W1
Save storable parameters as user configuration 1
&Y0
Load user configuration 0 on power up
&Y1
Load user configuration 1 on power up
&Z n=x
Store phone number x in location n(n=0-3)
Fax/Modem
B-5