Comtech EF Data CDM-425, Installation And Operation Manual

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CDM-425 Advanced Satellite Modem
Revision 0
Appendix F F–31 MN-CDM-425
CAUTION – IMPORTANT NOTE:
When CnC-APC is active, you are not permitted to change configuration
parameters that potentially affect the operation of CnC-APC (modulation
type, FEC type, code rate, framing, etc). If you attempt to change one of these
parameters either locally or remotely, the change will not be accepted. In
order to change these configuration parameters, CnC-APC needs to be
suspended first. Following the changes, you should re-activate CnC-APC. Be
aware that the re-activation will be preceded with a new re-balance operation.
F.4.7 CnC-APC Redundancy Support Notes
Chapter 6. FRONT PANEL OPERATION
The CnC-APC feature fully supports 1:1 redundancy. As required with standard CnC 1:1
redundancy operation, a PMSI cable is required to connect the two units in a 1:1 pair. See
Chapter 6. FRONT PANEL OPERATION, Sect. 6.2.1.8.4 CONFIG: CnC

PMSI-Control
At this time, 1:N redundancy in the CRS-300/CRS-500 is not yet supported – a firmware update
for these switches will be available in the future. Please consult Comtech EF Data Technical
Support for updated information.