Patent ID: 7259782

Claim:
Communicating apparatus to be provided between an intermediate line and transmission lines to establish data communications, said intermediate line and said transmission lines having in combination data pass therethrough, said transmission lines including first line and second line, comprising: first receiving means for receiving said data via said first line; second receiving means for receiving said data via said second line; interface means for transmitting via said intermediate line said data received by said first receiving means via said first line and said data received by said second receiving means via said second line, and for receiving said data transmitted by an other communicating apparatus via said intermediate lines; first transmitting means for transmitting via said second line said data transmitted via a first receiving means of said other communicating apparatus; first detecting means for detecting said data transmitted via said second line; first controlling means for controlling said first transmitting means in such a manner that said first transmitting means is selectively switched between under its operative state and under its inoperative state based on said data detected by said first detecting means; second transmitting means for transmitting via said first line said data transmitted via a second receiving means of said other communicating apparatus; second detecting means for detecting said data transmitted via said second line; and second controlling means for controlling said second transmitting means in such a manner that said second transmitting means is selectively switching between under its operative state and under its inoperative state of said second transmitting means based on said data detected by said second detecting means.