Comtech EF Data KST-2000A/B - Manual (Page 153)

E–1
Appendix E. FSK REMOTE
CONTROL COMMANDS
This appendix describes the protocol and message command set for FSK Remote Control
Commands used on the KST-2000A, Single-Thread Configuration.
Firmware No. FW/9364-1 and FW/10303-1
E.1 Introduction
Modifications have been made to the KST-2000A (herein after, referred to as the
terminal) firmware and hardware to permit monitor and control from the front panel of
several Comtech EF Data Satellite Modems. Currently the supported modems include
but are not limited to the CDM-550T, CDM-570, and CDM-600 (herein after, referred to
as the modem). The control is transmitted via an FSK signal superimposed on the RX
connection of the modem.
The modem transmits monitor and control commands via the FSK and the terminal
responds. The terminal parameters can be viewed and configured from menus on the
modem front panel.
Just as the modem can be controlled via a EIA-232 or EIA-485 bus from an external PC,
so can the terminal. The commands from the computer are transmitted to the modem. The
address is decoded, if the address indicates a message is for the terminal, the modem
transmits the message onto the FSK. The FSK response from the terminal is received and
retransmitted via the serial link back to the computer.
The address of the terminal is dictated by the address of the modem. The user selects
“Enable ODU,” from the front panel of the modem. This initiates several commands to
force the terminal address to (modem +1), and interrogate its factory settings.The FSK
link format (8N1) and baud rate (9600) are fixed. The standard I/O (eg via EIA-232/EIA-
485 direct) of the terminal is unchanged.