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DEFINITY TN777B NETWORK CONTROL - REFURBISHED
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Communicates control channel messages between the processor circuit pack and the distributed network of port circuit packs on the TDM bus
Controls 4 data channels that process and route information directly from the processor circuit pack to customer connected equipment
Has time of day clock with battery back for power failure or low voltage conditions
Monitors the status of the system clocks and alerts the processor circuit pack in the event of a failure of any clock
Also supports ISDN
Replaced by TN794 Network Control/Packet interface for R7 and R8
Replaced by TN2401 Network Control/Packet interface for R9 and R10
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