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Backup for Ground Communication
Circuits
With traditional terrestrial network solution, redundancy
does not ensure reliability. In many cases, redundant
terrestrial fiber links are buried together in the same
trench and conduits, and most telephone companies do not
guarantee the speed with which the circuits will be restored.
As a result, circuit outages can last for days.
MIDAS (Multimedia Integrated Digital Access System) automatic
circuit restoral function can effectively solve terrestrial
link interruptions. It provides quick and automatic circuit
restoral and forms a satellite/terrestrial backup system.
MIDAS (Multimedia Integrated Digital Access System) is
a bandwidth on-demand system, i.e. DAMA-BOD sytem. The
DAMA-BOD system is a newly developed sytem, which adds
DAMA function onto the medium/high speed data PAMA system,
so it allows satellite circuits assignment on-deman, to
flexibly assign satellite transponder resources upon actual
service needs, and therefore invest less to backup large
amount of terrestrial lines.
MIDAS can operate in various topological structures, such
as star, multi-tier star, mesh and composite net. It supports
various circuit connectivity such as permanent connectivity,
periodic connectivity and connectivity on-demand. MIDAS
is highly reliable, robust, and less possible to happen
the whole-net paralysis. The system is a modul-based design
that allow expansion without influence on the regular
operation of the system.
MIDAS automatic circuit restoral features:
 Provides
fully-automatic, simplistic, unattended operation,
Restores
data circuits ranging from 2.4Kbps to 155Mbps,
Automatically
restores failed circuits via satellite in less than 5
seconds.
Optimizes
space segment usage
The MIDAS system supports both priority and pre-emptable
satellite circuits. This allows you to optimize the most
expensive component of the restoral network- the satellite
space segment. With MIDAS, the space segment can be used
for pre-emptable services when priority restoral circuits
are not in use. Thus, occasional use applications such
as videoconferencing, switch ISDN and data circuits can
employ the idle space segment.
In addition, MIDAS shares hub modems and the satellite
space segment among all of the circuits in the network.
Unlike a traditional SCPC network, you only need to purchase
enough hub equipment and space segment to cover the worst-case
outage condition. This reduces the recuring monthly satellite
space segment expense, as well as the capital investment
required for the hub equipment.
MIDAS automatic circuit restoral application is compatible
with any standard router or switch that can be programmed
to automatically switch from a primary path to an alternate
path upon primary path failure.
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