Comtech EF Data SDR-54A - Manual (Page 79)

Appendix A. Remote Control
Operation
This appendix describes the remote control operation of the SDR-54A.
• Firmware number: FW/5445-1K
• Software version: 4.2.4
A.1 General
Remote controls and status information are transferred via an EIA-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.
A.2 Message Structure
The ASCII character format used requires 9600 bits/second, 11 bits/character:
• 1 start bit
• 7 information bits
• 1 parity bit (even)
• 2 stop bits
A–1