Copper loops and _________ are used between the analog phone and the CO switch:
Answer(s): D
Analog two-wire loops and __________ are two general types of transmission systems.
Answer(s): C
How many DS1s are used to connect the DLC to the CO switch?
Answer(s): B
An inexpensive substitute for T carrier is:
Answer(s): A
Relative long transmission routes between cities and towns are commonly served byT carrier, fiber optics and:
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