H3C MSR810 Command Reference Manual page 249

Table 48 AT commands in common use
Command Description
Forces the modem to go off-hook in answer mode. If a call is coming in, the modem will try
to answer it without waiting for the ringtone. This command is useful when manual
A
answer mode is used.
Sets the modulation protocol preference.
Available options:
•
•
Bn
•
•
•
Dials a telephone number. The n argument represents the dial string. In pulse dialing
Dn
mode, the modem ignores nonnumeric characters.
Controls echo of commands to the configuration terminal.
Available options:
•
En
•
Sets the method to terminate a call.
Available options:
Hn
•
•
Displays modem information and results of checksum tests on firmware.
Available options:
•
•
•
In
•
•
•
Sets the speaker loudness for fax and data communication.
Available options:
•
Ln
•
•
Sets the speaker mode for fax and data communication.
Available options:
•
Mn
•
•
•
B0—Selects the ITU V.22 mode. The transmission speed is 1200 bps.
B1—Selects the Bell 212 mode. The default transmission speed is 1200 bps.
B2/B3—Cancels the ITU V.23 backward channel.
B15—Selects the ITU V.21 mode. The transmission speed is 300 bps.
B16—Selects the 103J mode. The transmission speed is 300 bps. This setting is the
default for Compaq Presario 192-VS and Compaq Presario 288-VS modems.
E0—Disables echo of commands to the configuration terminal.
E1—Enables echo of commands to the configuration terminal. This option is the
default.
H0—Forces modem on-hook to hang up the line (the default).
H1—Forces modem off-hook to answer or dial.
I0/I3—Displays the default transmission speed and controller firmware version.
I1—Runs a checksum on the ROM and displays the result.
I2—Runs a checksum on the ROM and displays the checksum status:
OK—The checksum is correct.

ERROR—The checksum is incorrect.

I4—Displays the hardware version of the data pump.
I5—Displays the product code, software version, hardware version, and country
code.
I9—Displays the country code.
L0/L1—Low volume.
L2—Medium volume (the default).
L3—High volume.
M0—Speaker is always off.
M1—Speaker is on until the carrier is detected. This option is the default.
M2—Speaker is on when the modem is off-hook.
M3—Speaker is on after a dial until the carrier is detected.
237