| 摘要 |
PURPOSE:To improve remarkably the utilization of the device by utilizing an automatic information function to a sensor detecting input and an automatic response function to an incoming call and adding a function controlling a part of line and a linking function. CONSTITUTION:When an incoming call exists from a calling telephone set to an automatic informing device TA, an incoming signal detection relay detects it to drive a line closing and a talking coupling circuit and also to close an expanding contact. Then a dial impulse of talking destination stored in advance is fed to an exchange EX. When the talking destination telephone set responds, since a polarity inverting signal is incoming from an exchange EX, a called party response relay detects it and drives a line control circuit TAA and a talking coupler CU of an automatic informing device TB so as to connect the line. |
