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Model MT5600ZDXV
2.5 Operating Your MT5600ZDXV
You control your MT5600ZDXV by issuing AT commands and setting
S-Registers. Right now your MT5600ZDXV is set up for the most typical user
application, that is, as a traditional modem set to make a dial-up call to a remote
installation where the call is answered automatically; therefore, you shouldn’t
need to change the current default configuration. (If however, you know that
your application does not follow this profile, please refer to Chapter 3 for AT
Commands and S-Registers.)
In operating your MT5600ZDXV it is likely that you will use your data
communications software to either:
·
enter “terminal” mode, where you can “speak most directly” to the modem
by issuing AT commands, or to
·
launch a datacomm session through a set of modem configurations which
you select and then associate with a target telephone number. Once you
have created, saved, and named this set of information according to your
connection needs and your datacomm software’s conventions, the
software then simplifies your dialing because you needn’t reconfigure your
modem, nor run the risk of mistakenly keying-in incorrect information.
Either way, you need to understand that an AT command is the method by
which your modem is controlled, and must therefore prefix nearly all
commands. AT stands for attention, and alerts the modem that a command
follows. You may enter these commands with either upper- or lower-case
characters. Entering AT automatically sets the modem’s serial baud rate to
match your computer’s and also sets the modem’s parity. It also clears the
modem’s command buffer.Once you’re in terminal mode, enter AT followed
by <CR> to check whether your modem is operational. If everything’s fine,
your modem will respond
OK.
2.5.1 Simple Operations
You can dial by using the ATD command and the phone number of the modem
with which you wish to connect, e.g., ATD6127853500. Your modem will
dial the number; a “scrambling” noise is heard as the modem negotiates the
kind of connection it can make, and once the modems have settled on a
common connection, a connect message on your computer’s video is
displayed. To hang up a call, enter ATH0<CR>. Your modem will return on
hook, just as if you had returned a phone’s handset to its cradle. Your video
now displays
OK, signifying that your modem is ready for your next command.
