| 摘要 |
PURPOSE:To lighten a load on software processing of an elecric exchange on the stored program control system, by converting a pulse-system line signal into a corresponding continuous line signal. CONSTITUTION:Signal converting circuits CONV provided to outgoing trunk OGT and incoming trunk IGT receive pulse-system line signal BPLS or FPLS from trunk OGT or IGT. Then, a discrimination between a short pulse and long pulse is made to convert the received signal into continuous line signal BLS or FLS that corresponds to the pulse-system line signal and it is displayed by trunk scanner TSCN. This scanner TSCN sends scanning information out to central controller CC. Consequently, controller CC only performs software processing by a simple program, so that its load can greatly be lightened. |
