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System architecture – Comtech EF Data MIDAS 4 System and Design User Manual

Page 18

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System and Design Manual, Revision 2
1–4 Introduction

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MIDAS is divided into four distinct areas of operation:

The MIDAS Controller

Traffic Nodes

Network Management System (NMS)

Remote NMS

The network is interconnected with an outbound Time Division Multiplex
(TDM) control channel and a bursted, Slotted Aloha inbound control channel.
They are used for all network management and call control message transfers
between the MIDAS Controller and the traffic nodes.

A direct link is supported between any two traffic nodes, so that additional
delays are not encountered by having to route traffic through the MIDAS
Controller site. Traffic nodes in the network communicate with the Controller
for bandwidth allocation, call setup and termination, and status reporting.

A MIDAS network consists of:

• The MIDAS Controller site
• Traffic sites

The MIDAS Controller site may also host traffic nodes, sharing the RF
equipment and the antenna with the MIDAS Controller.

A traffic site consists of one or more traffic nodes along with the RF
equipment, the antenna and the customer equipment. Traffic sites are typically
remote sites, however, as implied above, remote and traffic sites may be
interchanged without loss of generality.

MIDAS Controller

The MIDAS Controller is responsible for managing the network. Via the
operator workstation, the MIDAS Controller provides the operator interface
(Local Client or NMS) for configuring and administering the network.

• It maintains a log of all network events, including call detail records,

alarms, and other traffic node reported events.

• Users can access these records to monitor and analyze network

performance.

• Call detail records can be exported in a comma-delimited format for

off-line billing.