Filter
Top Products
CHAPTER 2: INSTALLATION DEFINITY Communications System
7400B Data Module
Page 2-12
User’s Guide
INITIAL SYSTEM CHECKS This section describes procedures for initially checking out your
hardware and any required software. It is assumed at this point that your
hardware and data communications software have been properly
installed and are ready for use.
Note:
Data communications software is required only if you are
using a PC as your terminal device. A dedicated data
terminal does not need data communications software.
Power-Up Self-Test When power is first applied to the 7400B Data Module, the unit
performs a self-test to determine that it is in working order. The
progression of the self-test is indicated by the sequential, left-to-right
lighting of the 10 front-panel LEDs.
If the self-test finds no problems, the LEDs labeled POWER/TEST and
TR will remain lit and all other LED lamps will go out.
Note:
The operation of the LEDs described here assumes that the
factory-default options are still in effect. Once certain
options have been changed, the operation of the LEDs may
differ from this description.
Your 7400B Data Module is now installed and ready for data
communications operation.
IF YOU ARE USING A PC Review the documentation for your PC and data communications
software. Be sure that you understand both well enough to get the
software running and place your PC in terminal mode.
Since there is such a diversity of functionality among the many
packages available, refer to the user’s manual of the software package
for specific details of its use. Appendix C, “Application Notes”
provides guidelines for using a few of the more popular packages with
the 7400B Data Module.
IF YOU ARE USING A
DEDICATED TERMINAL
To determine whether your terminal is communicating with the 7400B
Data Module, type the following command line:
AT
[ Enter ]
Note:
The two characters of the “AT” command prefix must be
typed as either both uppercase or both lowercase. That is,
you can type either at or AT, but At or aT will not
work.
If everything is operating properly, the command should appear on the
screen as you type it, and the 7400B Data Module should respond with
OK. Refer to Chapter 5,“Troubleshooting,” for help if you are not
getting these results.