RCS20 M:N Redundancy Switch
Revision 15
Remote Operations
MN-RCS20 and CD-RCS20
A–14
A.3
DETAILED OPCODE DESCRIPTIONS
A.3.1
Opcode <2001h> Query RCS20 Switch Status
Query Response Data Field (44 bytes) (64 bytes release 4.0)
<1>
Control Mode
0 = Front Panel, 1 = Terminal Mode, 2 = Remote Port (Computer RLLP)
<1>
Software Revision
Binary number, decimal point implied
<1>
Number of Channels
10 decimal for RCS20
<1>
Number of Status
Bytes Per Channel
3 as of release 1.0, 5 as of release 4.
*This number of bytes per channel might change with newer release numbers. It is set
to 3 up to release 3.9, and 5 bytes as of release 4.0.
**Remote M&C developers must make use of this value to find out how many bytes
per channel are being transmitted.
<1>
*Channel 0 Status
Bit 0 = modulator failure flag (0 = no failure, 1 = failure)
Bit 1 = demodulator failure flag (0 = no failure, 1 = failure)
Bit 2 = switch communication in process (0 = no communication in
process, 1 = communication in process)
Bit 3 = modem communication fault (0 = no failure, 1 = failure)
Bit 4 = modulator present (0= not present, 1= present)
Bit 5 = demodulator present (0= not present, 1= present)
<1>
*Backed up Modulator 0 = This channel not a backup channel, or this channel is a
backup channel but currently not backing up a mod, 1-9 = This channel
currently backing up a mod, channel number as indicated.
<1>
*Backed up
Demodulator
0 = This channel not a backup channel, or this channel is a backup
channel but currently not backing up a demod, 1-9 = This channel
currently backing up a demod, channel number as indicated.
<1>
*Module 0 Alarms 2
Status
Bit 0 = Mod learned (0 = Mod is not learned, 1 = Mod is learned)
Bit 1 = Demod learned (0 = Demod is not learned, 1 = Demod is
learned)
Bit 2 = Mod configuration changed (0 = Mod configuration has not
changed, 1 = Mod configuration is changed)
Bit 3 = Demod configuration changed (0 = Demod configuration has not
changed, 1 = Demod configuration is changed)
Bits 4 through 7 = Spares
