Avaya, AT&T, Lucent, Definity TN777B Network Control V20

* 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


These are government surplus units. Surplus to the needs of the wisconsin department of corrections