| 摘要 |
PURPOSE:To inform a called extension of request for recalling and enable a called subscriber to make recalling properly by letting a caller additional dial specified items in case of incoming of trunk line. CONSTITUTION:When a station side caller desires call to an extension 3 by additional dial system, the caller dials additionally special number for request for recalling, number of the extension, subscriber's number of the caller and hooks on. Consequently, a central controlling unit 9 stores this dial information in a memory 10, and displays presence of recalling request on a display unit 4 provided in the extension 3. Then, when the extension 3 dials special number for calling and recalling, the unit 9 catches a main wire trunk 5 and a sender 7, and reads out subscriber's number of the caller from the memory 10 and sends out. Consequently, the caller is recalled automatically. |
