Specifications

AT Commands and Result Codes
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AT X<n> Result-code reporting options - Sets normal or extended result-code reporting.
n=0: Enables result codes 0-4 only.
n=1: Disables dial-tone detection and busy-detection result codes.
n=2: Disables busy-detection result code.
n=3: Disables dial-tone detection result code.
n=4: Enables all result codes.
n=4
AT Y<n> Long space disconnect - Enables or disables long-space disconnect.
n=0: Long-space disconnect disabled.
n=1: Long-space disconnect enabled.
n=0
AT Z<n> Reset modem - Resets the modem and restores the predefined modem
configuration profile n (where n is either 0 or 1).
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AT &C<n> Sets carrier detect state.
n=0: Sets carrier detect to ON.
n=1: Sets carrier detect to ON only when there is a valid carrier signal.
n=1
AT &D<n> Sets how the modem uses the Data Terminal Ready (DTR) signal.
n=0: Modem ignores DTR.
n=1: Modem assumes the command state when DTR switches from ON to OFF.
n=2: Modem goes off-hook (hangs up) and assumes the command state when
DTR switches from ON to OFF.
n=3: Modem is reset when DTR switches from ON to OFF, and loads the stored
configuration profile selected by the AT &Y<n> command.
n=2
AT &F<n> Returns all settings to factory default <n>.
n=0: Restores factory configuration 0.
n=1: Restores factory configuration 1.
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AT &G<n> Guard tone ON/OFF - Generates the specified guard tone.
n=0: Disables guard tone. (Default for North American models).
n=1: Disables guard tone.
n=2: Selects 1800 Hz guard tone.
n=0
AT &K<n> Flow control settings - Defines the DTE/DCE (terminal/modem) flow-control
mechanism.
n=0: Disables flow control.
n=3: Enables RTS/CTS flow control (default for data modem modes).
n=4: Enables XON/XOFF flow control.
n=5: Enables transparent XON/XOFF flow control.
n=6: Enables both RTS/CTS and XON/XOFF flow control.
n=3
AT &Q<n> Sync/Async mode - Controls the connection modes.
n=0: Selects direct asynchronous operation.
n=4: Selects autosynchronous operation.
n=5: The modem attempts to negotiate an error-corrected link.
n=6: Selects asynchronous operation in normal mode (speed buffering).
n=5
Command Function Default