____________ is the out-of-band signaling between toll central offices (Bell System Standard) A. 2,000 Hz B. 800 Hz C. 3,835 Hz D. 3700 Hz

____________ is the out-of-band signaling between toll central offices (Bell System
Standard)
A. 2,000 Hz
B. 800 Hz
C. 3,835 Hz
D. 3700 Hz
by

1 Answer

Answer :

D. 3700 Hz
by

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