| 摘要 |
PURPOSE:To make it possible that a calling subscriber corrects an extension number without disconnecting a trunk line, by adding a correction signal detecting part to a push-button register and adding a correct extension number transmission pressing part to a talkie trunk. CONSTITUTION:When a talkie trunk 2 sends a signal which presses the transmission of an extension number to a calling subscriber 8, the subscriber 8 sends the extension number; and if he corrects the extension number, he sends a correction signal of a preliminarily determined form. When a correction signal detecting part 11 detects this signal, a voice which presses the transmission of a correct extension number is sent to the subscriber 8 from a correct extension number transmission pressing part 12 provided in the talkie trunk 2 through a central office trunk 9 and a subscriber's exchange 7 after the extension number stored in a pushphone register 3 is erased. If the subscriber 8 sends the correct extension number then, connection corresponding to the correct extension number is performed. |
