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Flashcards in Midterm Deck (134)
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1

what are 4 types of media that can be used for transmission in camera systems

coax
fiber
twisted pair
wireless

2

in an orthographic projection there can be up to _____ standard views and _______ of auxiliary views

6
any number

3

what is a RAID and what is it used for

Redundant array of independent disks

multiple backups in case one becomes corrupted

4

Category 4 transmission characteristics

Category is considered legacy

5

Definitions

NFPA 70 article 100

6

ANSI/TIA 569-D requires __________ sleeves for the first 40,000 square feet of area served by the intrabuilding backbone system, plus one additional sleeve of the same size for every 40,000 square feet after that

five four inch sleeves

7

Fire stops are used for restoring the integrity of _________ in fire rated materials

penetrations

8

570-C

Residential Telecommunications infrastructure standard

9

Name three sources of EMI

transformers
florescent lights
motors and generators

10

what is the max bend radius for a four pair UTP cable when it is being pulled

4 times cable diameter

11

name 4 items that shall not be located, installed, pass through, or enter a telecommunications closet

piping not related to the rooms purpose
transformers
motors
generators

12

as frequency increases _______ increases

attenuation

13

what are the TIA-570-c requirements for grade 2 cabling

two cat 5e or higher and two 72 ohm coax cable

fiber is optional

14

How can EMI and RFI problems in telecommunication cables be reduced

use a shielded cable and proper separation from EMI producing objects and your telecommunications cables

15

what scale uses the 1/2 or 1/4 size concept

mechanical engineers

16

what is the most common type of print for low voltage construction

floor plan

17

a ______ cabling system uses standardized media and layout for backbone and horizontal cabling

Structured

18

signal is measured in _____

Db

19

NFPA 70 article 250

Grounding and bonding

20

the ______ of a coaxial cable is used to protect against EMI

Braided shield

21

the print that shows the location of the structure relative to the lot, road, or to other structures is the

site plan or plot plan

22

what is the difference between a static and a dynamic IP address

static does not change if node moves to another network while dynamic IP's are randomly assigned by the computer

23

what is standard POE voltage

48 VDC

24

list the 5 most common causes of communication problems

poor termination
EMI and RFI
bend radius
pull too hard and stretch cable
staple wires to hard

25

what is a TBB and what are the minimum and maximum sizes for it

telecommunications bonding backbone - connects the primary busbar to the secondary busbar

6AWG - 750Kcmill

26

Telecommunications pathways and spaces

569-D

27

secondary bonding busbar

a busbar placed in each distribution room. bonds all equipment in Distribution room to Ground

28

ER

Equipment room

29

what are the installation requirements for plywood backboards in a telecommunications space according to 569-d

3/4 in AC rated plywood size 8' by 4'
galvanized, stainless or zink coated fasteners
2 coats of fire rated paint
at least one wall covered
6 in above finished floor

30

Commercial Building grounding (Earthing) and bonding requirements for telecommunications

607-C