Ringing voltage is comprised of a ________ frequency that rides ...

[abern]

Ringing voltage is comprised of a ________ frequency that rides on a(n) ________ AC signal.
 
  A) 20 Hz, 70 volt B) 20 Hz, 200 volt C) 10 Hz, 70 volt D) 40 Hz, 80 volt

Question 2

The protector block:
 
  A) connects the telephone cord to the inside house wiring
  B) connects a subscriber's line to the switches
  C) connects the outside plant cable to the subscriber's premises
  D) is mounted on the outside of a house by the local telephone company to terminate the telephone wire pair

[momolu]

Answer to Question 1

A

Answer to Question 2

D

[abern]

TYSM

[xiazhe]

Thanks for the timely response, appreciate it