| 摘要 |
PURPOSE:To reduce the amount of wiring and make special number dial of users needless, by sending a booster battery to the extension telephone set from the trunk through the network in a hotel and so on. CONSTITUTION:Booster battery BB is sent from trunk MWT, which is provided commonly, to desired extension telephone set TEL through network NW to light indication lamp L. Then, when TEL responds to it, connection to the guide talkie is performed, so that users need not operate special number dial. Further, an waking talkie function is given by adding a morning trunk. |
