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The CDM-4001 is a Simple Network Management
Protocol (SNMP) Agent for use in IRT's FRU-4001 frame. It occupies its own designated slot within the
frame, next to the power supply, so it does not affect
the number of modules that can be used within the
frame.
The CDM-4001 can communicate with all modules
in a Frame that are fitted with an SMU-4000 SNMP
Interface sub-board, or have inbuilt SNMP facilities.
The information obtained is forwarded via an
Ethernet connection to any SNMP Network
Management System (NMS) whose address is
configured in the CDM-4001.
The CDM-4001 holds parameters such as Frame
Name, Address and Location. This information may
be set via an RS232 Configuration port.
The NMS third party software (not supplied by IRT)
polls the CDM-4001 to remotely monitor and control
the frame and its SNMP capable modules.
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In the event of a major alarm from any of the
modules or power supply an alarm condition, known
as a Trap, is automatically sent without any
prompting from the NMS.
Front panel LEDs indicate the presence of an
Ethernet link, link activity and the Frame urgent &
non-urgent alarm states.
Ethernet connection is via an RJ45 connector and the
RS232 is via a D9 female connector on the rear of
the frame. Modules that are being monitored and
controlled share a common data bus on the frame.
SNMP monitoring and control finds particular use in
remote or unmanned locations such as transmitter
sites, or where control via a computer is desired.
As the CDM-4001 can be assigned its own IP
Address, multiple sites can be monitored and
controlled via the one NMS. Alternatively, multiple
NMS's in different locations can be used to monitor
and control the same site.
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