The system to clear the frequéncia desired for transmission in a communication system in communication system and cable in the communication system based on cable and process and system in SIS.The the

摘要

A cable system (10) has a plurality of CAUs (34) coupled to a variety of network devices (58-68) in the subscriber's premise (36). The network devices transmit signals to the CAU ) in a clear frequency (100). The signals are coupled to a filter (70) which blocks any ingress noise from the premise. The filter (70) is coupled to a mixer (76), which down converts the signals from the clear frequency to a desired frequency (104). Upstream signals in a bypass band (102) are coupled from the network devices to a low pass filter (72). The signals are then combined with the downconverted signals and transmitted into the cable system.