T: picture 1, top
Blinking Phone Line Indicator
Always indicates V
AB
(1). Indicates with a continuous or blinking light. Doesn't indicate the ring signal.
V
AB
(0) : DC 48-50 volts, a free phone line
V
AB
(1) : 0 volts or DC 7-10 volts, a busy phone line
T: picture 1, bottom right
Two way switch
T: picture 2, bottom
Required current:
I(0) = 3.0 mA
I(1) : 9.0 - 14 mA
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