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160
Communication
Break Function
A break condition is the occurrence of a continuous space on a
communication line for greater than one character time. Some systems
and communication equipment recognize break as a special attention
signal.
You can generate a break signal (275 ms space) by pressing
~
(Break),
unless you have changed the function of the
~
key (Keyboard Set-Up
screen).
Changing the terminal comm ports feature setting from
Sl=Comml
to
one of the two-session configurations also generates a break signal. This
action alerts the host that the session configuration has been altered.
The
~
(Break) key has three functions when used as a break key.
~
(Break)
Sends a break signal to the host.
!Shift!
~
Disconnects communications when you use a modem.
(Break)
!Ctrll~
(Break)
Sends the answerback message (Communications Set-Up
screen) to the host.
Connector Signals
The VT420 has two 6-pin connectors on the rear of the terminal. Both
connectors can be used as host system (Comml or Comm2) connectors,
and one of the two can be used as a printer connector (Comm2). Both
connectors use the same signals. Table C-l describes the signals.
Figure C-2 shows the pin numbers for the 6-pin connectors.
r-"'"
2
3
4
~y
6
}
~
'--
J"-
"""--
~
~
GSF_1383_89.DG
Figure C-2
6-Pin Connector Pinouts
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