In the phone network,the interexchange carrier link is _____.
A)shared by users in a neighborhood
B)shared by all users of the end office
C)dedicated to a single user
D)dedicated to business customers
In the phone network,interexchange carriers are _____.
A)networks that carry traffic between end offices
B)parcel services that help exchange traffic information between carriers
C)devices that provide the customer's dial tone
D)the links that carry signals from the end office to the customer's premises
The unit of frequency is _____.
The phone system transmits signals in the range _____.
A)520 kHz - 1,610 kHz
B)87.5 MHz - 108.0 MHz
C)2)44 GHz - 2.46 GHz
D)300 Hz - 3,400 Hz