A high-speed data transmission network system (8) is provided. The system
(8) includes a plurality of subscriber premises (12) that transmit a
first upstream signal (28) on a first frequency band to a central office
or a remote terminal (10), which is in communication with the plurality
of subscriber premises (12). The central office or the remote terminal
(10) broadcasts a downstream signal (30) to each of the plurality of
subscriber premises (12) on a second frequency band, which is higher in
frequency than said first frequency band. The downstream signal (30)
contains one or more subscriber group signals and a plurality of
subscriber specific signals. A controller (44) provides each of the
subscriber premises (12) access to one or more of the one or more
subscriber group signals and to a corresponding subscriber specific
signal of the plurality of subscriber specific signals. A method of
performing the same is also provided. A method of adjusting performance
of transmitted signals between a central office (10) and a subscriber
premise (12) within the high-speed data communication network system (8)
is additionally provided.