CXR V.34bis series, Руководство по эксплуатации и установке

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Modes and Configurations
22
V.34bis Series Standalone & Rackmount Modems
Selecting a Configuration By AT Command
The AT&Fn command causes the modem to load the factory configuration
"n" into the active memory of the modem, putting the modem into a known
operating state. The AT%Mn command will load into active memory one of
the user configurations "n" stored with the AT&Wn command, putting the
modem into a known operating state.
The configuration can be used as it is, or modified to fit the application. If
the configuration is modified, it can either be abandoned at the end of the
session or stored into non-volatile memory with the AT&Wn command as
shown below.
The AT&Wn command stores a new user-specified configuration in non-
volatile memory. The new configuration is based on the current settings of
the modem S-registers. This new configuration will be active if it is
associated with a number to be dialed or activated by the AT%Mn
command.
FORMAT: AT&Wn
where n = 0 - 4 for the user configurations %M0 through %M4
where n = 5 - 9 for the factory configurations &F0 through &F4
The modem will load the last configuration that was saved when it is
powered up. A factory configuration can be used without deleting the user
configuration as long as the factory configuration is not saved as the user
configuration with the AT&Wn command.
Special Reset Command - AT&W255
This is a special command that resets the modem to the factory settings
including the erasing of all telephone numbers and attributes stored, and
the erasing of all passwords that may have been stored. However, this
command does not compromise the password security features of the
modem because if a supervisor password is stored then that password is
required in order to enter this AT&W255 command. The stored
configurations will be set to the factory conditions as given in Table 3.1.
This may be a useful and a known starting point in setting the modem for
differing applications. This special command is useful when the modem is
moved to a new location or a new application is being implemented. By
utilizing the AT&W255 the factory configurations are set at a known starting
point, and telephone numbers, attributes and security features are erased
for re-entry as required.
International Variations to the Configuration
When these modems are used for international calls, there are a few
settings that should be changed. To receive a modem call from some
European countries, the guard tone must be turned on. England requires