| 摘要 |
PURPOSE:To secure the great effect in terms of the traffic and the service, by having the answer to the office incoming call just through the push and release of the button keys of the key telephone set. CONSTITUTION:In case the answer is given to the incoming call from the main wire in the automatic private branch exchange by means of the telephone set EXT with push-button keys, the key is pushed down to send the key push-down signal to oscillation register OR via switch frame SWF. Then register OR operates the office answer identification relay and the C position relay via the push-down signal. When pushing of the button is released, the key is released. And telephone set EXT is connected to the incoming call line with the release of the C position relay in order to give the answer to the incoming call. Thus the answer can be given to the incoming call just through the push-down and release of the button keys. As a result, the great effect can be secured in terms of the traffic and the service. |
