Question 1

Outside plant cable is categorized as:

Accepted Answer

Outside plant cable can be categorized as feeder, distribution, or drop, depending on its use in the network infrastructure.

Question 2

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

Accepted Answer

The type of copper cable that hangs between telephone poles running down individual streets is known as distribution cable. It connects the feeder cables to the individual subscriber lines.

Question 3

Fiber-optic cable:

Accepted Answer

E

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.

Accepted Answer

Most fiber optic cables are buried at a depth of about 3 to 4 feet (0.91 to 1.22 meters), not 10 feet, to protect them from surface activities and minor disturbances, not as deep as 10 feet.

Question 5

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

Accepted Answer

The term "section" is not commonly used to refer to a specific portion of fiber cable, whereas "system," "span," and "segment" are terms used in the context of fiber optic networks.

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.

Accepted Answer

The answer of Very few companies use ________ splicing of...

Question 7

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

Accepted Answer

The answer of A fiber ________ refers to the length...

Question 8

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

Accepted Answer

Bridged taps are remnants of unused cable segments in telephone wiring that do not serve a current function. They indeed add resistance and can lead to unbalanced circuits, affecting signal quality.

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.

Accepted Answer

A load coil is not an amplifier; it compensates for signal loss over long distances by reducing the effective capacitance of the line, which improves the signal quality but does not amplify the signal.

Question 10

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

Accepted Answer

Load coils, which are used to boost voice frequencies on longer telephone lines, interfere with the high-frequency signals used by digital services like ISDN, T1, DDS, and DSL. Therefore, they must be removed to ensure these services function correctly.

Question 11

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

Accepted Answer

The answer of A(n) ________ box is a device that...

Question 12

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

Accepted Answer

The answer of Which of the following is not a...

Question 13

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

Accepted Answer

Within the terminal box, a technician can perform various tasks including troubleshooting issues, installing new services, and disconnecting existing services.

Question 14

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

Accepted Answer

Working in manholes poses significant risks due to the potential presence of toxic gases and the possibility of insufficient oxygen levels, both of which can be life-threatening to workers.

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 ________.

Accepted Answer

The answer of Industry standards dictate that when telephone cable,...

Question 16

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

Accepted Answer

The answer of The two types of DLCs now deployed...

Question 17

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

Accepted Answer

DLC (Digital Loop Carrier) is a system that digitizes and multiplexes the analog signals from individual telephone lines for transmission over a digital medium, not for switching calls. Switching calls is a function of the telephone exchange or network, not the DLC system.

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.

Accepted Answer

The answer of A(n) ________ gain device allows two subscribers...

Question 19

Amplifiers work equally well on both digital and analog signals.

Accepted Answer

Amplifiers are primarily designed to work with analog signals, boosting their power. Digital signals, being discrete (on/off) in nature, are not amplified in the same way; they are regenerated or reshaped to maintain signal integrity.

Question 20

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

Accepted Answer

T1, ISDN, and HDSL are all types of digital transmission technologies, and their ability to travel long distances without significant signal degradation is more a function of the repeaters and signal regeneration equipment used rather than the inherent capability of the technology itself. However, HDSL (High bit-rate Digital Subscriber Line) is specifically designed to carry high-speed data over existing copper telephone lines for relatively long distances compared to traditional ISDN (Integrated Services Digital Network), which is not specifically optimized for long distances without repeaters.

Quiz 19: Pstn Network Topology