Deck 18: Pstn Central Office

Question 1

One of the costliest considerations in a switch center is the unit necessary to maintain the room's ________.

Answer 1

temperature

Question 2

The ________ of the switch is the term used to define the square footage it requires.

Answer 2

footprint

Question 3

The size of the switch varies depending on the:

A) number of lines served by that office
B) number of trunk connections requires
C) make of the switch
D) all of the above

Answer 3

all of the above

Question 4

________ is a term used in telecommunications to describe ladder racking, relay racks, and other miscellaneous support structures.

Question 5

A false floor is a very convenient and preferred alternative to using ironwork.

Question 6

Switch-to-switch connections are always ________ circuits whether they are DS-1, DS-3, or higher rate interface such as OC-3.

Question 7

The ________ circuit is the most common way to connect two circuits.

Question 8

Switches today are connected using which of the following?

A) DS-1 twisted pair
B) DS-3 coaxial cable
C) fiber-optic cable
D) all of the above

Question 9

Most switches only require connections to other switches.

Question 10

For a switch to be able to switch calls, it must have a connection into the ________ network, which consists of a link between the switch and an STP.

Question 11

The acronym used for the center that is the hub of activity at most switch sites, typically located next to the switch room and housing a computer terminal that is directly connected to the switch, is ___________.

Question 12

The CLEC switch, unlike the ILEC's central office switch, does not have direct line side terminations to the subscribers but instead connects to special equipment located in a cage in the ILEC's serving central office.

Question 13

All of the following are true of both the LD switch site and the class 5 switch site except:

A) they both require an environmentally controlled room
B) they look very much alike
C) they are both complex
D) none of the above (all are alike in all of the above ways)

Question 14

The difference between the LD switch site and the ILEC and CLEC switch sites is that the long distance switch site does not have a(n) ________ because it does not have line side terminations.

Question 15

The equipment placed in the transmission room is used to transport voice and data traffic across the ________.

Question 16

The purpose of a cross-connect panel is to provide a(n) ________ meeting point for the circuits coming into and leaving the site.

Question 17

All of the following factors are important in choosing the correct DS-1 DSX panel except:

A) cost
B) application
C) size of the space
D) buyer's personal preference/needs

Question 18

A(n) ________ test simply monitors a signal for errors and is only done when a circuit is already down or a maintenance window has been scheduled.

Question 19

A(n) ________ test disrupts service.

Question 20

The main difference between a DSX-1 and a DSX-3 is that a DSX-1 panel terminates coaxial cable connections and the DSX-3 panel terminates twisted copper pair connections.

Question 21

A very important concept in the world of transmission is that each signal leaving one piece of equipment is that equipment's transmit, but that same signal arriving at the opposite end's equipment is that equipment's ________.

Question 22

The "brains"of the multiplexer is:

A) line cards
B) common cards
C) tributary or interface cards
D) no one area is brainier or has more control

Question 23

A typical transmission room holds a variety of multiplexers, from DS-1 upstream channel banks to high-end DWDM multiplexers, and the variety of multiplexers found there depends on the ________ speeds needed between sites.

Question 24

Only the largest switch sites have digital cross connect systems (DCS) equipment due to the:

A) cost
B) maintenance requirements
C) size
D) all of the above

Question 25

Most telecommunications equipment, including the switch, requires a(n) ________ volt feed.

Question 26

The horizontal side of the MDF provides the termination point for the outside plant cable.

Question 27

The special services block and the alarm block are both located on the vertical side of the MDF.

Question 28

Cable from the outside of a building enters the building through the cable ________.

Question 29

The function of a typical network-monitoring OSS is to:

A) consolidate all of the alarms and conditions from each piece of equipment
B) provision and configure the devices
C) directly support the daily operations of the telecommunications structure
D) all of the above

Question 30

In order for a switch to operate, power is available from the following sources in which order of operation and backup?

A) electric company, battery, diesel or gas-fed generator
B) electric company, diesel or gas-fed generator, battery
C) battery, electric company, diesel or gas-fed generator
D) diesel or gas-fed generator, electric company, battery