Lesson 6

Question 1

Is the physical path that runs between two or more points

Answer 1

Circuit

Question 2

Two Types of Circuits

Answer 2

Two-Wire Circuits, Four-Wire

Question 3

Has two insulated electrical conductors

Answer 3

Two-Wire Circuit

Question 4

What is each wire of the two-wire circuit used for?

Answer 4

transmission; return path

Question 5

When oppositely directed portions of a single telephone conversation occur over the same electrical transmission channel or path

Answer 5

two-wire operation

Question 6

Has two pairs of conductors

Answer 6

Four-Wire Circuit

Question 7

What does PSTN stand for?

Answer 7

Public Switched Telephone Network

Question 8

Types of four-wire circuits

Answer 8

Physical Four-Wire, Logical Four-Wire

Question 9

Four-wire circuit where you can actually count four wires

Answer 9

Physical Four-Wire

Question 10

Four-wire circuit where there are physically two wires but four individual paths are derived by spotting the frequency

Answer 10

Logical Four-Wire

Question 11

Boosts attenuated signal back up to its original power level so it can continue to make its way across the network

Answer 11

Amplifier

Question 12

Distance requirement between amplifiers for copper wires

Answer 12

6000 feet/ 1800 meters

Question 13

Could only amplify a signal moving in one direction.

Answer 13

First-generation amplifiers

Question 14

Length of local loops worldwide

Answer 14

less than 2 miles or 3.2 km

Question 15

It terminates on a port (that is, a point of electrical or optical interface), and that port can be in a host computer (that is, a switching device used to establish connections), on a multiplexer, or in another device.

Answer 15

Circuit

Question 16

Does not define the number of simultaneous conversations that can be carried

Answer 16

Circuit

Question 17

Are generally deployed in the analog local loop, which is the last mile between the subscriber and the subscriber’s first point of access into the network.

Answer 17

Two-wire Circuits

Question 18

When both directions are carried on the same pair of wires

Answer 18

Two wire Transmission

Question 19

In telecommunication,

A ______ is a two way circuit using two paths so arranged that the respective signals are transmitted in one direction only by one path and in the other direction by the other path.

Answer 19

four wire circuit

Question 20

Characterized by supporting transmission in two directions simultaneously, as opposed to four wire circuits, which have separate pairs for transmit and receive.

Answer 20

Two wire Circuit

Question 21

Are also used with leased lines, where a customer may be connecting locations of its own that are separated by distance.

Answer 21

Four wire circuits

Question 22

Refer to the number of wires in the internal cabling plan.

Answer 22

two pair and four pair

Question 23

Have to do with the number of electrical conductors associated with a transmission line.

Answer 23

Two wire and four wire

Question 24

It has two sets of one way transmission paths: one path for each direction and a complementary path to complete the electrical circuit.

Answer 24

Four wire circuits

Question 25

Are used where there is distance between the termination points which requires that the signal be strengthened periodically.

Answer 25

Four wire circuits

Question 26

The local loop is a two wire circuit for one reason only

Answer 26

to save copper

Question 27

Whenever you release energy into space, it loses power as it’s traveling over a distance. So, because networks were designed to carry communications over a distance, we need tools to augment signals that have been losing power as they have traveled across the network, which are called

Answer 27

attenuated signals

Question 28

The PSTN traditionally used

Answer 28

copper wires