Exam 9: Telephone Networks

_____________ is (are)generated by "overlaying" on an oscilloscope all the digital bit signals received.

The ______ for almost all telephone transmissions is a two-wire twisted-pair cable.

____________ occurs when calls are unable to reach their destination as a result of excess demand for system capacity.

What is the primary function of the private branch exchange (PBX)?

The connection paths for telephone service were all initially designed for what type of transmission?

___________ involves conveying two or more information signals over a single transmission channel.

The measure of calls lost during a busy hour period is known as _____________.

Regardless of whether signals are modulated or not,what must first happen to data?

Who provides the switch for the frame relay network?

What causes transmitted data to be routed back to the originating location by the receiver or,in telephone and wireline data systems?

Everything facing back to the customer side from the demarc is the customer's responsibility,whereas all equipment and connections facing back toward the carrier side is the carrier's responsibility. What does this statement represent?

What type of control keeps message blocks from being lost or duplicated and ensures that they are received in the proper sequence?

A square-wave signal is a digital ______________.

A __________ is a packet switching network designed to carry data traffic over a public data network (PDN).

What is the purpose of framing?

What type of effect does noise have on a signal?

Which of the following is a set of rules designed to force the devices sharing a channel to observe orderly communications procedures?

What is the busiest day of the week for telephone traffic?

Which of the following is the standard carrier system in North America?

Which of the following do line codes enable?