* Chapter 5 - Horizontal Distribution Systems

Question 1

How should the usable floor area be divided in the ceiling zones method of ceiling distribution?

Answer 1

Usable floor area should be divided into zones of ~250 sq ft to 1000 sq ft each

How a zone is divided depends on the zone’s purpose. For Consolidation Points (CP)s, zones should be preferably divided by building columns. BAS zones depend on number of BAS, coverage areas per cable, and other device-related factors.

Question 2

When using the ceiling zone method of pathway distribution for horizontal cabling, the raceways, conduits or cable trays should extend from the telecommunications spaces to the ____ of the zone.

a) any location along the perimeter
b) the midpoint

Answer 2

The midpoint.

And from there the pathway should extend to the top of the utility columns or wall conduit

Question 3

What is PoH?

Answer 3

Power over HDBaseT. An alternate to PoE for the transmission of dc power and data simultaneously over balanced-twisted pair and other forms of communications cabling.

PoH was created by the HDBaseT Alliance which delivers a maximum of 95W over four pairs.

Question 4

True or False
MUTOAs shall be located in fully accessible, permanent locations. Install MUTOAs in ceiling spaces, under access flooring and any obstructed areas.

Answer 4

False.
Do not install MUTOAs in ceiling spaces, under access flooring or any obstructed areas. MUTOAs shall not be installed in furniture unless that furniture is permanently secured to the building structure.

Question 5

For balanced twisted-pair cabling, MUTOAs should be located at least ~___ from the Horizontal Cross-Connect (HC) (Floor Distributer FD).

Answer 5

15m (49ft)

Question 6

The work area side of the MUTOA should be marked with the:

A) Maximum number of available ports
B) Served work area identifiers
C) Attached equipment cord identifiers
D) Maximum allowable work area equipment cord length

Answer 6

D) Maximum allowable work area equipment cord length

Question 7

The working load capacity of a cable tray system is determined by?

Answer 7

• Static load capacity of the tray
• Length of the support spans

Question 8

When telecommunications cabling pathway runs parallel to power cabling pathways, it is recommended to provide a minimum of ____ separation.

Answer 8

2in

Question 9

What is the maximum length for the work area cord using 24AWG MUTOA?

Answer 9

72ft

Question 10

What is the maximum length for the work area cord using 26AWG MUTOA?

Answer 10

56ft

Question 11

To ensure accessibility, ceiling-based pathways for horizontal cabling must be installed with a minimum of ___ clear vertical space above the ceiling tiles.

Answer 11

Three inches

Question 12

Supports for ceiling-based pathways for horizontal cabling must be installed at intervals not exceeding ___ to minimize cable sag, and a minimum of ___ above the ceiling tiles.

Answer 12

not exceed 5ft, and minimum of 3in above ceiling tile

Question 13

If sufficient space is available, how much space should be provided above the horizontal cable pathways in the ceiling?

Answer 13

Up to 6in should be provided between the cable pathway and the suspended ceiling.

Question 14

Within the permanent link, the maximum cable length shall be no more than ____, regardless of the type of transmission media used.

Answer 14

295 ft

Question 15

Within the channel, the total length of cabling shall not exceed ____. In addition the total combined length of flexible cabling within the channel shall not exceed ___ except when longer work equipment cords are permitted in conjunction with a MUTOA.

Answer 15

328ft
33ft for flexible cabling

Question 16

A single MUTOA can serve a maximum of ____ work areas.

Answer 16

12 work areas

Question 17

MUTOAs should be located at least ___ from the HC (FD) to minimize the effects of multiple connections in close proximity on near-end crosstalk loss and return loss.

Answer 17

49 feet