| 摘要 |
PURPOSE:To simplify an adaptor by providing additionally some function to the adaptor at a branching point so as to eliminate the need for the function of the adaptor as a relay exchange. CONSTITUTION:A trunk TRK used in common for the connection of slave stations A, B from an exchange SW is provided. In connecting mutually the slave stations A and B in the exchange SW, an ineffective trunk DMT acquisited so as to make the TRK busy and to be closed is provided. Further, a register sender RS receiving a selecting signal, identifying a station to be called and transmitting the selecting signal to the station to be called with relaying as required and selecting signal output circuits S1 and S2 are provided in the adaptor ADP at the branching point of the relay line. Through the constitution above, it is not necessary for the adaptor to provide a function as a relay exchange. Thus, the adaptor is simplified. |
