فیزیک

... > telecommunication > telecommunication services > telephony > telephone equipment > telephone line > subscriber loop

telecommunication > telecommunication equipment > telephone equipment > telephone line > subscriber loop

transmission line > telecommunication transmission line > telephone line > subscriber loop

telecommunication > telecommunication equipment > telecommunication transmission line > telephone line > subscriber loop

telecommunication > telecommunication services > telephony > telephone network > subscriber loop

networks (circuit) > telecommunication network > telephone network > subscriber loop

telecommunication > telecommunication network > telephone network > subscriber loop