| 摘要 |
PURPOSE:To make night answer and transfer possible only with a private branch exchange and a two-wire telephone set which is designated as a night rransfer board for a trunk line incoming call, by calling this two-wire telephone set by a special call signal different from that for other general two-wire telephone sets. CONSTITUTION:In the private branch exchange of the storage program control system, when trunk line incoming information detected by a two-way trunk 1 is received by a central control part 5, the night switching key of a B board 2 is scanned. If it is switched to the night, stored information of a two-wire telephone set 7 which is designated for night transfer is read out by a storage device 4, and a call signal trunk 3, the designated telephone set 7, and two-way trunk 1 are connected through a link 6, and a special call signal different from that for general telephone sets is transmitted to them. Thus, direct answer and transfer to an extenstion for the trunk line incoming call at night are made possible to make a night transfer board unneccessary. |
