Subscriber Station (SS) are designed to scan their frequency lists for active downlink channel right away upon installation or following any period of signal loss. In case of signal loss, the SS will store operational parameters of the last signal and will attempt to restore the connection.
After obtaining a channel with a valid downlink signal, the SS will try to synchronize the PHY by listening for DL-MAP management messages. The SS will continue to listen for DL-MAP management messages and in the case of missing DL-MAP messages the SS will repeat the scanning and synchronization process.
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