NETWORK INTERFACE UNIT WITH SELECTABLE UPSTREAM/DOWNSTREAM FREQUENCY BANDS

摘要

Network interface units with selectable upstream and downstream frequency bands are provided. In one embodiment, a network interface unit comprises: at least one network connector configured to receive signals from and send signals to a CATV headend; a first diplexer comprising first high and low pass filters configured for a first RF band; a second diplexer comprising second high and low pass filters configured for a second RF band; a third diplexer comprising third high and low pass filters; a port configured to output downstream RF signals received from the a third high pass filter to a modem and upstream RF signals received from the modem to the third low pass filter; and a coupling device configured to couple the first or second high pass filter to the third high pass filter, and couple the third low pass filter to one of the first or second low pass filters.