Assertion: telephone line | /r/HasAspect | up to 120 ma of dc
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Source sentences:
text: The simple things are that the telephone line is a balanced transmission line which can have up to 120 ma of DC current from up to 56 VDC (actually in some cases up to 90 VDC) and up to 120 VAC RMS (ring voltage) in the way of various voltages and currents.