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RCS20 M:N Redundancy Switch
User Interfaces
familiar with the basic concepts and operations. Front panel control is implemented as a series of
data entry screen. The data entry screens ("screens") are organized into several groups that
contain related parameters and status values. Screens allow the modification of control
parameters, display of status parameters, or both. Different screens will be displayed on the front
panel based on key presses from the front panel. The screens will be displayed in order; this order
defines the 'menu tree' for a particular group of related screens. A complete description of control
from the front panel, including explanations of each screen in the menu trees, is found below.
4.2 Remote Port Control
The RCS20 has a dedicated RS485 serial control port (Remote Port) for use with computer
controlled remote monitor and control systems. The Remote Port is a 9-pin female 'D' sub
connector J3 located at the rear of the unit on the Switch Interface plug in module. The pinouts for
the remote port are listed in Section 2. The Remote Port utilizes a binary protocol called Radyne
Link Level Protocol (RLLP). RLLP is a multi-drop packet-oriented protocol with handshaking, and is
completely described in Appendix B at the end of this manual. The remote port supports standard
UART asynchronous protocol with 8 data bits, no parity, and 1 stop bit (8N1) at 4 baud rates: 9600,
4800, 2400, and 1200.
4.3 Terminal Port Control
The RCS20 has a dedicated RS232 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 2. 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.
4.3.1 Terminal Interface
The terminal interface is menu driven and allows complete monitoring and control of all RCS20
parameters. A complete listing of all terminal interface configuration menus can be found in
Appendix C at the end of this manual. 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, and error message will be
displayed on the terminal.
4.4 Modem Checkout and Initial Power-up
The following descriptions assume that the RCS20 is installed in a suitable location with AC power
applied to both slide out power supplies. Before initial power-up of the RCS20, the IFS20 and
DDS20 must be connected to the RCU20 via the supplied 15-pin high-density 'D' sub connection
cables.
TM056 - Rev. 2.3
4-5
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