| 摘要 |
PURPOSE:To obtain a control system having extended data generation facilitated through improving the efficiency by separating a cyclic signal and random signal from the line concentration stage channel of a digial telephone switchboard and by separately performing suitable signal processing. CONSTITUTION:Among communication signals from line concentration channel 11 and distribution stage channel 3, a cyclic signal similar to a control signal for the monitoring of a junction line is passed through signal transmission line 312 from line concentration stage channel 11 and preprocessed by digital signal device 40, and signal processor 60 processes only the cyclic signal. Meanwhile, various pieces of information generated at random when a telephone set sends a call signal are transmitted and received with a common line signal and line concentration stage channel controller 21 and common line signal device 50 are connected together to perform communication processing. In this case, common line signal device 50 performs preprocessing and common line signal processor 70 performs special signal processing. |
