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In addition, the control modem may periodically poll a special address to determine if any tributary has requested a maintenance test.
In addition, the control modem periodically polls a special address to determine if any tributary has requested a maintenance test.
The satellite control channel is multiplexed onto the main data carrier and allows users to monitor and control modems and other equipment on the other end, leaving the main data signal undisturbed.--Radyne ComStream
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