Specifications

3.3 Electronic Interface
Figure 2 illustrates the electrical and electronic connections between the MCS-DR PC, MCS-DR
storage unit, station power, and station subsystems. The insets of Figure 2 show expanded rear
views of the MCS-DR PC and storage unit.
Figure 2: Diagram of electrical connections
4 Monitor and Control Interface
4.1 Overview
Control and monitoring of the MCS-DR is performed by the exchange of two different classes of
messages. The first class of messages are monitoring messages which request system status informa-
tion from the MCS-DR, while the second class of messages – command messages – request that the
MCS-DR execute some action. The format of monitoring messages are all the same, while command
messages may have formats that differ with respect to the specific command. Each monitoring
message requests some part of the MCS-DR’s Management Information Base (MIB). The following
sections describe in detail each of the MIB entries and command actions that the MCS-DR supports,
as well as the format of the response that the MCS-DR will return. If the MCS-DR cannot comply
with the request, then a rejection response will be sent with an error message as defined in section 4.7.
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