| 摘要 |
PURPOSE:To improve the function of the entire system and to attain the additional service, by providing a microprocessor system to at least a part of device of a subscriber device, a trunk device and a wire source device, for sharing the function of the central processing system. CONSTITUTION:Subscriber line devices 2, 2', trunk devices 4, 4' and a sound source device 5 are provided respectively with a microprocessor system, and the burden of the function of a CPU6 is shared with the microprocessor system. The microprocessor 23 and a memory 24 are provided to a telephone and network interface 21 connected to a telephone set 3 and a voice signal line 10 of the subscriber circuit and a signal port interface 22 connected to control signal paths 11, 12. |
