Boca Systems M144PA, Руководство пользователя

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14.4 BOCAMODEMcard-PC
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Example:
ATH or ATH0 tells the modem to disconnect
Extended commands were developed to provide greater
functionality and control over modem operations. Their
format is the same as the basic command except that an
additional parameter is required following the AT prefix and
before the numerical parameter. This additional parameter
comes in three different forms:
the ampersand (&) character: extended AT command
the backslash (\) character: extended AT command for MNP
the percent (%) character: extended AT command for V.42/V.42bis
Examples
: AT&V tells the modem to display (view) its
current configuration and user profile.
AT\G1 enables flow control. Flow control compensates for
the difference between the rate at which data reaches a
device and the rate at which the device processes and
transmits.
AT%E1 tells the modem to monitor line quality and request
a “retrain” (adjustment) to the connection.
S-Registers
Modem command “language” also employs a set of
indicators or registers, which are various numerical values all
with a standard “S” prefix, hence S-Registers. To a large
extent, the values defined in the S-Registers regulate the
operation of the modem and the function of some
commands in the AT command set.