AT COMMAND SET
Section 4
4-2
Copyright (C) Dataplex Pty Ltd
3.
Entering
ats7=60K
will cause the modem to wait 60 seconds for
carrier from the answering modem.
4.
Entering
atdn5K
will cause the modem to dial the number stored in
location 5.
Or type one concatenated string:
atx3 s0=4 s7=60 dn5 K
which has the same
effect (spaces between commands are ignored and are optional).
The above command descriptions have numeric modifiers to allow selection from one of
several command options. These are usually shown as parameters 0 to 9. Where a numeric
selection is omitted, the command processor assumes a zero (0) has been entered. For
example AT*W is interpreted as AT*W0.
Commands take a variable time to execute, depending on the length of the command line
and the type of command. The DPX-213 also takes a short period (750 microseconds) after
the end of one command (the transmission of the result code) before it is ready to accept
the next command. During this time the DPX-213 is resetting its internal registers in
preparation for the next command. If communications equipment sends an 'AT' sequence
during this 750 microsecond period, the 'AT' and subsequent command will be ignored.
4.2 Attention Code Syntax
It is possible to disable the AT command sequence by using the AT*D1 (Dumb Mode)
command. In this mode, the unit will not respond to any AT sequence. The only way to
reset the unit from this state is to carry out a power up reset (if not stored in NVRAM).
A description of the syntax for entry of AT commands follows:
Carriage Return
Command lines end with the carriage return character
K
. The value of this character is
stored in Status register S3, and may be changed if desired. The default value of the
carriage return is ASCII code 13 {0D HEX}.
Backspace
If an incorrect entry is made in a command line before
K
is depressed, the backspace
key (
E
) can be used to erase the mistake. The backspace key will erase all characters up
to, but not including the attention code (AT). The backspace character is stored in Status
register S5. The default value is ASCII code 8.
Summary of Contents for DPX-213
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