| 摘要 |
PURPOSE:To connect an existing telephone set to a device by installing four in-home circuits separated into an outer line and an inner line and connecting the existing telephone set directly to the in-home outer line. CONSTITUTION:A main wire 11 is connected through a return connecting terminal plate 12 from a host machine 13 to an in-home outer line 14 of the in-home circuit. On the other hand, further, an in-home inner line 15 is connected through a connecting terminal plate 12 to the host machine 13. Plural connecting terminal plates 16 are in parallel connected to the in-home outer line 14 and an in-home inner line 15. Two terminals of the in-home outer line 14 and two terminals of the in-home inner line 15 are provided with the connecting terminal plate 16, a slave machine is connected to the four terminals and the existing telephone set is connected to two terminals of the in-home outer line 14. At the time of incoming of the main wire 11, the host machine 13 drives a tone ringer circuit 22 when main wire incoming detecting circuit 12 detects the incoming of the main wire 11. By a detecting output from the main wire incoming detecting circuit 21, a control part 28 knows a main wire incoming. By a control from the control part 28, a switch sp is switched to an in-home inner line side 15 and an output of the tone ringer circuit 22 is sent to the in-home inner line 15. At the existing telephone set 18, since the in-home outer line 14 is connected, the incoming of the main wire 11 appears as it does. |
