PURPOSE: To ensure the control according to the characteristics of each device by installing the common communication processor to the analog and digital trunk devices featuring the different properties along with addition of a simple control bus switch circuit.
CONSTITUTION: The module is formed by having the set between time-division channels 18-0∼18-2, digital trunk devices 19-0∼19-2 and signal processors 20-0∼ 20-2 each. And the auxiliary module is formed with channel 18-2 plus the modules of devices 19-2 and 20-2 each. At the same time, digital circuit groups 11 and 12 are connected to channels 18-0 and 18-1, and furthermore circuit switch device 15 is switched via auxiliary device 19-2 to secure an optional connection for channels 18-0 and 18-1 to channel 18-2. On the other hand, analog circuit groups 13 and 14 are connected to analog trunk devices 16 and 17 which perform the A/D conversion, and the signal process is carried out via devices 20-2∼20-2 and under the control of CPU10. Then the control is given to devices 16 and 17 of different types plus devices 19-0 and 19-1 through devices 20-0 and 20-1, and the switching the given to optional one of devices 19-1∼19-2 via maintenance driving device 22.
SAITOU ISAO
YAJIMA TOSHIO
SUZUKI MASAHIKO
YAZAWA KATSUHIKO
AWAJI TOSHIO
NIPPON TELEGRAPH & TELEPHONE
OKI ELECTRIC IND CO LTD
NIPPON ELECTRIC CO
FUJITSU LTD