ADAPTER FOR ISDN PROTOCOL MONITOR DEPENDENT UPON PERSONAL COMPUTER

摘要

PURPOSE:To inexpensively give the variety of service for various purposes by sending the signal of a channel to a personal computer and displaying the presence or the absence of the signal and supplying the signal on a bus wiring and the measurement timing. CONSTITUTION:An adapter 4 is connected to a bus wiring 2 consisting of a transmission T line and a reception R line connected to a subscriber terminating set DSU 1 of an integrated data service digital network (ISDN). Data is taken out of D-channel data through monitor parts 5T and 5R and framing bit detecting parts 7T and 7R by D bit detectors 8T and 8R and is converted to parallel data and is outputted to D bit terminals 12T and 12R for personal computer. B bit extracting parts 9T and 9R extract bits of B1 and B2 channels and display them on LED display parts 10T and 10R. Further, outputs of monitor parts 5T and 5R are connected to terminals 11T and 11R for oscilloscope connection. Thus, the variety of service is inexpensively given.