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Troubleshooting
4-10 Issue 2 November 1996
Characters typed on
the keyboard are not
displayed on the
screen of the
terminal device.
If the red LED
flashes off but the
green LED does
not flash on when
characters are
typed, the
command echo
option is turned off.
Press to start a new command
line, and then type
ATEl
to turn on the command echo.
If the red and green
LEDs do not flash
when keys on the
terminal are
pressed, the
terminal is not
working, or the EIA
Connector cord or
adapter are not
connected or are
improperly wired.
Connect or replace the EIA Connector
cord and/or adapter between the
8400B Plus Data Module and the local
terminal device. If the problem persists,
verify that the terminal is functioning
correctly.
The red LED
flashes off and the
green LED flashes
on, but certain EIA
signal leads are
turned off.
Press to start a new command
line, then type
AT&S0&C0
to ensure that the DSR and RLSD EIA
signal leads are turned on.
An
AT prefix is
typed, and it is
displayed as AATT.
The terminal is
optioned to display
each typed
character, and the
8400B Plus Data
Module’s command
echo option is
enabled.
Disable the command echo by entering
ATE0. As you type the ATE0
command,
AATTEE00 will appear,
and the 8400B Plus Data Module will
send the response code
OK to your
screen. The next command that you
enter should appear in single
characters.
Table 4-1. Troubleshooting Guidelines — Continued
Symptom Problem Solution
ENTER
ENTER
ENTER
ENTER