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Introduction to AT Commands
3.10
CORE AT COMMANDS
The g20 responds to a limited commands set when the SIM card is not functioning, for any of the following reasons:
• No SIM card is inserted in the g20 SIM tray.
• A bad, locked or blocked SIM card inserted.
In previous products, the Core AT commands were called "Basic AT commands". The name "Core" differentiates between the
basic AT commands format and the limited service AT commands.
The following table lists the Core AT commands.
Command
$
This command displays a list of all the AT commands supported by the g20.
%C
This command enables/disables data compression. This command is used for
backward compatibility only.
&C
This command determines how the state of the DCD line relates to the detection of
the received line signal from the distant end.
&D
This command determines how the g20 responds when the DTR (Data Terminal
Ready) status is changed from ON to OFF during the online data state.
&F
This command restores the factory default configuration profile.
&G
This command selects the guard tone. This command is used for backward
compatibility only.
&K
This command configures the RTS/CTS flow control.
&L
This command enables leased line operation. This command is used for backward
compatibility only.
&M
This command enables asynch/synch mode connection.This command is used for
backward compatibility only.
&P
This command selects pulse dialing. This command is used for backward
compatibility only.
&R
This command selects the CTC controls.This command is used for backward
compatibility only.
&S
This command defines the DSR behavior. This command is used for backward
compatibility only.
&T
This command selects tone dialing.This command is used for backward compatibility
only.
?
This command displays the most recently updated value stored in the S-register.
\A
This command sets the maximum MNP block size.This command is used for
backward compatibility only.
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Table 5. Core AT Commands
Description
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