SYSTEM, METHOD AND DEVICE HAVING TEACHING AND COMMERCE SUBSYSTEMS

摘要

A frequency band selection device that can be inserted into a signal transmission line of a CATV system on the premise of a user includes at least two signal path sets between a tap side and a premise side. Each signal path set includes two discrete signal paths, a high frequency signal path for a downstream bandwidth and a low frequency signal path for an upstream bandwidth. The high frequency signal path and the low frequency signal path are separated by a cut-off transition frequency that is different for each signal path set. The device further includes a switch controller having at least two discrete switch positions. The switch controller chooses one of the switch positions as a result of an information signal. Each of the switch positions corresponds to a respective one of the signal path sets.

主权项

1. A frequency band selection device that can be inserted into a signal transmission line of a CATV system on the premise of a user, the device comprising:
at least two signal path sets between a tap side and a premise side, each signal path set comprising two discrete signal paths, a high frequency signal path allowing a downstream bandwidth to pass from the tap side to the premise side and a low frequency signal path allowing an upstream bandwidth to pass from the premise side to the tap side, the high frequency signal path and the low frequency signal path being separated by a cut-off transition frequency that is different for each signal path set; and a switch controller having at least two discrete switch positions, the switch controller choosing one of the switch positions as a result of an information signal, each of the switch positions corresponding to a respective one of the signal path sets.