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RCS20 M:N Redundancy Switch
User Interfaces
4.5
Terminal Port Control
The RCS20 has a dedicated RS-232 serial port (Terminal Port) for use with a separate terminal or
computer running a terminal emulation program. The Terminal Port is a 9-Pin female 'D' sub connector J2
located at the rear of the unit on the Switch Interface plug in module. The pinouts for the remote port are
listed in Section 5. The terminal port supports standard UART asynchronous protocol with 8 data bits, no
parity, and 1 stop bit (8N1) at 4 baud rates: 19200, 9600, and 2400.
4.5.1 Terminal Interface
The terminal interface is menu driven and allows complete monitoring and control of all RCS20
parameters. Refer to Figure 4-3 through Figure 4-6 for a complete listing of all terminal interface
configuration menus. Three terminal emulation protocols are supported: DEC VT-100, Wyse-50, and
ADDS Viewpoint. The terminal display is a full screen presentation of the current status of the switch
modes and variables. The screens will display both status and control variables. The status variables
cannot be modified, but the control variables can be.
Each variable that can be modified will have a display number next to the value, and changing the value
is accomplished by typing the number of the variable to be changed. Two types of input may then be
requested from the user. If the input is multiple choice, the space key must be pressed to cycle the
available choices until the desired value is displays. The 'Enter' or carriage return key must then be
pressed for the new value to take effect. If the input is numerical, the desired value should be typed using
number keys ('0' to '9'), then pressing the 'Enter' key. An input can be aborted at any time by pressing the
'ESC' key. If an invalid value is entered, an error message will be displayed on the terminal. Refer to
following terminal screens as illustrated.
Enter Selection Number:
+-------------¦ Main Menu ¦-------------+
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1
Switch Controls
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2
Switch Status
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3
Alarms
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4
Event Buffer
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+---------------------------------------+
Figure 4-2. Terminal Main Menu
4–64
Revision 15
MN-RCS20 and CD-RCS20
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