Service messages, Traffic node to midas controller service message, Nms to traffic node service message – Comtech EF Data MIDAS 4 System and Design User Manual
Page 97
System and Design Manual, Revision 2
Operator Functions 5–27
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Service messages are provided for exchanging short text messages between
the MIDAS Controller and a traffic node. The length of the service message is
28 characters.
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At the traffic node, the service message is entered through the user port for
delivery to the MIDAS Controller. On receiving the message, MIDAS
displays it on the operator workstation.
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The service message is entered at the MIDAS operator workstation for
delivery to the traffic node. On receiving the message, the traffic node sends
the message to the device connected to the user port. The MIDAS will not
accept a service message for delivery if the message is addressed to a traffic
node that is not in the database.
There is no acknowledgment or re-transmission for MIDAS to traffic node
service messages. It is the operator’s responsibility to recover from lost service
messages.