7 0
AT% (percent) Commands
%Bn
%B0
%Cn
%C0
%C1*
View numbers in blacklist.
Displays the numbers for which the last call attempted in the past two hours
failed. The ERROR result code appears in countries that do not require
blacklisting.
V.42bis/MNP5. Controls data compression. Online changes do not take effect
until a disconnect occurs.
Data compression disabled.
Data compression enabled.
AT\ (backslash) Commands
\Gn
\G0*
\Jn
\J0*
\J1
\Kn
\K5*
\Nn
\N0
\N1
\N2
\N3*
\N4
\N5
\N7
Set Modem Remote Flow Control. Selects the modem’s remote flow control. If
the modem is receiving data from the remote modem faster than it can be
processed, enabling remote flow control allows the modem to handle the data
efficiently. Remote flow control is independent of local terminal flow control
and is ignored during a reliable connection.
Returns an “OK” for compatibility.
Adjust BPS Rate Control. The modem emulates the behavior of modems that
force the DTE interface to the line speed.
Turn off feature.
Turn on feature.
Set Break Control. Controls the actions taken when either the local terminal
sends a Break to the modem or the modem receives a Break from the remote
modem.
NOTE: In reliable mode, the originating modem \K setting determines how the
answering modem handles the Break .
Send Break to the remote modem in sequence with any data received from the
serial port.
Error control mode selection: determines the type of error control used by the
modem.
Normal mode:
• Error control is disabled
• Flow control is allowed
• V.42 buffered
Direct mode:
• Error control is disabled
• Flow control is not allowed
• Slaved DTE/DCE is enabled
MNP or disconnect mode.
LAPM, MNP or normal mode.
LAPM mode.
Same as \N3.
Same as \N3.
\Qn
\Q0
\Q1
\Q3*
\TN
\T0*
\TN
\Vn
\V0*
\V1
\Xn
\X0
Flow Control Settings. Selects the method the modem uses to prevent
overflowing the buffer with data.
Disable flow control.
Enable bi-directional XON/XOFF flow control.
Enable bi-directional CTS/RTS flow control.
Inactivity Timer Control. Allows the modem to disconnect if no data activity
has occurred for the selected period of time.
Disable inactivity timer.
Disconnect after n minutes of inactivity. (n=1-255)
Protocol Result Code
Disable protocol result code appended to DCE speed.
Enable protocol result code appended to DCE speed.
Backward compatible command.
Enables the modem to communicate with lower speed modems.
Result Code/Message Definitions
Note:
For each CONNECT response, the same result code is used,
regardless of the “V42bis” or “NoEc” extension. For example,
“CONNECT 33600 NoEc”, and “CONNECT 33600
V42bis” both use result code 60.
Result Code
Message
Definition
0
OK
Command has been executed.
1
CONNECT
Connection has been established with
another modem. If X0 is set, the connection
rate is variable. Otherwise, connect rate is
300 baud.
2
RING
Incoming call detected.
3
NO CARRIER
No carrier has been detected, or the remote
carrier has been dropped.
4
ERROR
Command is invalid.
5
CONNECT 1200
Connection has been established at
1200 baud.
6
NO DIALTONE
Dial tone has not been detected
7
BUSY
Modem hung up because of a busy line
detection.
8
NO ANSWER
The modem detected no carrier and the @
dial modifier was used.
9
CONNECT 75
Connection rate at 75 BPS.
10
CONNECT 2400
Connection rate at 2400 BPS.
