Comtech-ef-data MIDAS 4 System and Design Uživatelský manuál Strana 30

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System and Design Manual, Revision 2
2–6 Solutions
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MIDAS supports a wide range of grades of service to meet any requirements.
The following circuit characteristics can be configured to provide different
grades of service to different users:
Data rates
Modulation
Encoding
Transmit power
Circuit priority
Circuit preemption
Multiple terrestrial interface
Dedicated bandwidth pool with optional overflow pool
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Usually, terrestrial circuits can only be leased for a fixed Committed
Information Rate. For bursty traffic, it is very inefficient to lease capacity for
peak traffic. MIDAS will perform the following:
Provides an automatic congestion reduction solution to deal with
occasional peaks in traffic.
Handle the overflow traffic, when the customer leases terrestrial
capacity for typical traffic needs supplementing the terrestrial network.
Backup the primary terrestrial circuit in case of failure.
A typical setup for congestion reduction is illustrated in Figure 2-2. In
addition to terrestrial circuit, the routers also get connected over the
overflow satellite circuit.
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