| 摘要 |
PURPOSE:To keep the multiload generating function of the mimic call device and then send the multifrequency signal, by giving the alternate control to the signal sending switching circuits and at the same time sending the signals corresponding to each circuit correspondence circuit by controlling the signal combination sending circuit which is provided in common. CONSTITUTION:Signal combination circuits 20-2N at multifrequency signal sending part 2 are provided in correspondence to two circuit correspondence circuits 10A, 10B-1NA, 1NB and via the signal sending switching circuit. Then the alternate control is given to signal sending switch relays GOA and GOB, and at the same time the control is given to signal combination sending relays L10-H30 which are provided in common. Thus the signals corresponding to circuits 10A-1NB each are sent alternately. As a result, the multifrequency signal can be sent without losing the multiload generating function of the mimic call device. |
