Dataplex DPX-213, User Manual

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Section 4
AT COMMAND SET
Copyright (C) Dataplex Pty Ltd
4-1
4.0 AT COMMAND SET
This Section contains some useful information about entering commands into the DPX-
213, the 'AT' command syntax and the different operating states. The Section also contains
a complete alphabetical listing of all commands.
4.1 Command Line and Command Entry
The DPX-213 uses the common AT command set which Dataplex has extended to cover
additional features. The attention code, the letters 'AT', must precede all command lines to
the DPX-213. This code may be in either upper or lower case. The modem uses the AT
characters to detect the baud rate and character format of the incoming data. In this way,
each command line can be at a different baud rate if desired. Once the AT sequence has
been entered, the baud rate and character format are fixed for the remainder of that
command line.
Typing AT while off-line will alert the internal control processor, but while on-line, the
'pause'
+++
'pause' escape sequence must be entered.
Some AT commands act on S-Registers. These are storage locations where various
operating parameters are stored. These parameters control various modem features, such as
the number of rings to count before answering an incoming call, the delay after dialling
and before carrier detect, and so on. Refer to Section 8 for a full description of the S-
Registers used in the DPX-213.
A command line to the DPX-213 consists of an attention code, one or more commands,
and a carriage return (
K
). A command line may contain up to 129 characters
(including the attention code and the carriage return). Should you enter more than 129
characters, the DPX-213 will abort the command and return an ERROR code. Re-enter the
command sequence in two smaller command lines.
Commands
may be concatenated to save time. For example
at&fs0= 5d1234567K
causes the DPX-213 to recall
the factory configuration, set S0=5 (answer telephone on 5th ring) and then dial 1234567.
Do not type AT more than once on any line or the AT character will be interpreted as
command and not Attention.
For example you can enter commands separately:
1.
Entering
atx3K
will cause the modem to blind dial (not wait for dial tone).
2. Entering
ats0=4K
will cause the modem to answer on the fourth ring.