| 摘要 |
PURPOSE:To attain the compactness and to reduce the cost of a device of control station side by providing a low pass filter LPF and a hybrid coil in common to be used for a controlled station to a control station and connecting them to an individual line via a line switching means to prevent missing of data due to line switching. CONSTITUTION:One LPF4 is provided to a control station and the station is connected to stations to be controlled SB1, SB2, SB3 via the LPF4, a hybrid coil 5 and a contact 82. When a switch corresponding to the station to be controlled SB1, a route as shown in solid lines L1' and dotted lines L2' is formed. That is, a data signal and a talking signal from the station to be controlled SB1 are inputted to the hybrid coil 5 through the contact 82, and the signals are branched into the talking signal and the data signal. The talking signal is supplied to a telephone set 2 via the LPF4 and the data signal is fed directly to an MODEM MDM1 via a contact 81 respectively, then the simultaneous communication is attained. |
