1.

Logic 1 in RS-232 is:

A. -3V to -25V; typically, -12 V
B. +3V to +25V; typically, +12 V
C. +3V to +5V; typically, +3 V
D. -3V to +25V; typically, +12 V
Answer» B. +3V to +25V; typically, +12 V


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