Comtech EF Data SDM-9000 - Manual (Page 219)

Rev. 4 B–1
B
Appendix B.
REMOTE CONTROL OPERATION
This appendix describes the remote control operation of the SDM-9000.
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Firmware number: FW/4100-1F
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Software version: 6.1.1
B.1 General
Remote controls and status information are transferred via an RS-485 (optional RS-232)
serial communications link.
Commands and data are transferred on the remote control communications link as
US ASCII-encoded character strings.
The remote communications link is operated in a half-duplex mode.
Communications on the remote link are initiated by a remote controller or terminal. The
modem never transmits data on the link unless it is commanded to do so.