Multitech MT2834MR, Руководство пользователя

Страница: 29 / 106

PN 88300150
4/3/01 29
3.9 Configuration Commands
3.9.1 Configuration Storage and Default Commands
&F Loading Factory Defaults
Because the modem has the capability of storing reconfigured parameters and S-Register
values into its non-volatile Random Access Memory (RAM), you may wish to have a choice
between these RAM stored parameters and values or the factory default parameters and
values (as determined by the modem’s ROM and DIP-Switches). The &F command lets you
set the modem to the factory defaults in ROM. The modem will then ignore the parameters
and values that remain stored in RAM.
The command AT&F causes the MT2834MR to use the factory default setting ROM
configuration parameters and S-Registers values. To replace the parameters and values
stored in RAM with all factory default settings, combine the &F and &W commands by typing
AT&F&W and hitting ENTER.
The &F8 and &F9 commands determine the function of the &F command.
If you type the &F8 command (the factory default setting), and later type a subsequent &F
command, the modem reads the factory default settings, regardless of what is stored in non-
volatile RAM (defined by the &W command).
If you type the &F9 command, and then type a subsequent &F command, the modem reads
the parameters and values stored in non-volatile RAM as the defaults. The result is that the
setting of the &W command defines the source of the default parameters and values that
your modem reads as its factory default settings.
&W Storing Configuration & S-Register Parameters in the Modem’s Non-Volatile Memory
The MT2834MR can store its configuration parameters and S-Register values in its non-
volatile read/write (RAM) memory.
Type the &W command to store parameters and S-Register values in the modem’s RAM, and
to prevent any reconfiguration from being lost on a power-down or Reset (ATZ) condition.
Type AT&W0 (or AT&W) to cause the modem to store its current parameters and values in
its non-volatile RAM. This command also sets the modem so that when it is powered up, or
when it is reset with the ATZ command, the modem will read all of its configuration and S-
Register parameters from RAM, and not from the factory default setting in ROM.
Type AT&W1 to set the modem so that it does not store its parameters to RAM, and, when a
subsequent power on condition or ATZ command is executed, parameters will be read from
the factory default settings in ROM and from the DIP-Switch settings.
Z Modem Reset
Type the Z command to reset all MT2834MR configurations to their factory default settings,
and to clear the Command mode buffer. When you type ATZ, the result is the same as if you
had disconnected, and then reconnected power to the modem. When the ATZ command is
executed, the state of the &W command determines where the default values originate.
(&W0 defaults come from RAM and &W1 defaults come from ROM.)