| 摘要 |
PURPOSE:To enable centralized operation and management for the incoming calls to the entire system at the attendant board of the master station, by providing a simple adaptor to master station having the attendant board and a plurality of slave stations without it, and using commonly the indenpendent control information transmission line. CONSTITUTION:The incoming call to an automatic exchanger 2 in a slave station is connected to extensions 221-22n at a slave station controller (CP) 250, and further connected to extensions 121-12n of the master station 1 via adaptors 231- 23n, lines 401-40n and adaptors 131-13n and connected to an attendant board (AB) 160 at CP 170 with incoming call display. Further, the control information from the master station is selectively converted and transmitted to a slave station adaptor 240 via an independent line 600, and adaptors 231-23n respond to the incoming call and connect AB 160 with an external line. At transfer, the hooking signal via adaptors 240, 231-23n is detected at CP 250, and the selection signal converting the numeral key information of AB 160 is given to the slave station via lines 401-40n to call out the extension 220 at CP 250. This is similarly operated for the slave station 3 as well. |
