Deck 19: Pstn Network Topology

Question 1

Outside plant cable is categorized as:

A) feeder
B) distribution
C) drop
D) any one of the above

Answer 1

any one of the above

Question 2

The type of copper cable that hangs between telephone poles running down individual streets is:

A) feeder
B) distribution
C) drop
D) any one of the above

Answer 2

distribution

Question 3

Fiber-optic cable:

A) unlike copper cable, does not terminate at the subscriber's home
B) is used to carry large amounts of traffic between two points
C) is much smaller in diameter and weighs less than copper cable
D) like copper cable, terminates in manhole 0 or telephone pole 0
E) all of the above

Answer 3

all of the above

Question 4

Most fiber cable is placed at least ten feet underground to ensure that the cable will not be disturbed when a backhoe digs in the area or when the ground pushes up the duct during spring thaw.

Question 5

Which of the following is not a name for one of the three specific portions of fiber cable?

A) section
B) system
C) span
D) segment

Question 6

Very few companies use ________ splicing of fiber cable due to the high splice loss, but it can be used as a temporary fix during fiber cuts.

Question 7

A fiber ________ refers to the length of fiber between two splice points.

Question 8

Bridged taps do not provide any function and, in fact, add resistance to the line and can cause unbalanced circuits.

Question 9

The load coil, an inductor placed along the wire path to help extend the distance the voice signal can travel, is really an amplifier.

Question 10

Load coils must be removed when which of the following lines are deployed:

A) ISDN
B) T1
C) DDS
D) DSL
E) all of the above

Question 11

A(n) ________ box is a device that connects a subscriber's location to the distribution cable.

Question 12

Which of the following is not a category of terminal box?

A) underground
B) column mount
C) ready access
D) aerial fixed count
E) pole mount

Question 13

Which of the following is a task that can be accomplished within the terminal box by a technician?

A) troubleshooting
B) installation
C) disconnecting service
D) all of the above

Question 14

Safety concerns are of critical importance with regard to work in a manhole due to the increased threat of:

A) water seepage
B) things to trip on in the dark
C) toxic gases
D) insufficient oxygen
E) both a and c
F) both c and d

Question 15

Industry standards dictate that when telephone cable, electric wire, and cable TV cable share the same telephone poles, the electric wire must be placed at, on, or in the ________.

Question 16

The two types of DLCs now deployed are the integrated DLC and the ________ DLC.

Question 17

Like a switch, the DLC is able to switch calls.

Question 18

A(n) ________ gain device allows two subscribers to share the same line and helps to reduce the number of cable pairs needed to feed subscribers from a central office.

Question 19

Amplifiers work equally well on both digital and analog signals.

Question 20

A T1 signal can travel much further than ISDN and HDSL signals can.

Question 21

The point of ________ is the point at which a long distance carrier connects into the local network.

Question 22

The microwave signal can travel a distance of 40-45 miles before it has to be regenerated.

Question 23

________ doped amplifiers have revolutionized the long haul network by eliminating the need to locate DWDM multiplexers every 60 miles, thus cutting costs enormously.

Question 24

What must be maintained in the ocean in order for circuits to be connected internationally?

A) submarine cable
B) amplifiers
C) regenerators
D) all of the above

Question 25

An interesting phenomenon over the past few years is the concept of ________ bandwidth between carriers.

Question 26

Obtaining right of way is basically an optional, good-faith measure to show property owners and municipalities that their feelings are being considered.

Question 27

Describe the process of splicing copper cable, and include in your discussion the ways in which cable splicers determine which wires should be spliced to one another.

Question 28

________ is the acronym for any device that interfaces with the outside physical network, such as a dedicated T1 circuit, a POTS line, and ISDN line, and so forth.

Question 29

The portion of the network controlled by the local telephone company is the ________ side of the network.