| 摘要 |
PROBLEM TO BE SOLVED: To switch a gate switch for an incoming channel remotely with a signal from a terminal without the need of an operation of a gage switch for each amplifier through patrol on the occasion and without making contact of a gate operation request between the terminal and a center. SOLUTION: An incoming signal terminal equipment 4 that transmits a video/ audio information signal for a center is connected to a relay transmission network of a 2-way CATV system, a request signal to request continuity of an opening of an incoming channel is outputted to the center is outputted from the incoming signal terminal equipment 4 when the incoming channel to the center is open with an outgoing polling signal from the center, and the enter replies the request signal to keep the incoming channel open continuously. Or an incoming signal terminal equipment 4 that transmits a video/audio information signal for a center is connected to a relay transmission network of a 2-way CATV system, a 2-way relay amplifier 1 receives immediately a request signal from the incoming signal terminal equipment 4 sent to the incoming channel and closes the gate switch upon the receipt of the request signal to open the incoming channel. |
