Grades of service, Congestion reduction/overflow – Comtech EF Data MIDAS 4 System and Design User Manual
Page 30
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.