Chp 5 Flashcards
Horizontal Cabling system design purpose
to minimize building maintenance costs over time by installing a flexible design with standardized parts and robust support for current technologies
RCDD is responsible for first planning and designing a thorough _______ system that can be used for the duration of the building’s lifetime
pathway
MUTOA
multi-user telecom outlet assembly
CP
connection points
2 most critical design components for a system that can accommodate many applications/tenants
MUTOAs and CPs
Horizontal Cabling topology
star
Minimum required number of TOs per work station/work area
2
How to determine minimum number of required TOs/work area?
Specific to client’s application and the number of devices requiring network connectivity. Standard is 2 because 1- voice and 2- data
Min. # of TOs required when fiber is utilized for data at each work station
2
because with current technologies, if a new tenant were to occupy the space, it is unlikely they would have fiber capable equipment, and therefore would need these TOs
3 exceptions to using physical star topology
1- CPs and MUTOA are used in the horizontal cabling configuration
2- a TP is required to connect to under-carpet cabling
3- centralized fiber optic cabling configuration is implemented from the MC (CD) to work areas
Transmission channel in horizontal cabling consists of
1- permanent link cabling
2- required patch, equipment, and interconnection cords
3- the connection points
Max # of connection points in transmission channel in horizontal cabling
4
Max # of connection points in permanent link
3
RJ-21 connectors have ___ pairs and can only be used with ____________
25,
special/factory/pre-terminated patch cords
Electromagnetic field topics
Interferance
Compatibility
EMC is determined by
if a system is functional given the EMIs present. The allowable emissions and standards put in place to acheive system immunity allow EMC to have a measurement
EMI classifications
Transient or continuous Natural Electric field/magnetic field Intentional or unintentional Desirable or undesirable
The increase in the _____ of cables has lead to the standard minimum conduit size to be 1in
O.D.
When work areas are divided into zones, a minimum conduit size of ____ should be ran for each zone that is in the range of 250sqft. - 600 sqft
2in
Zones larger than 600 sqft. should have a minimum of a ____ conduit
2.5in
Work area floor spaces are approximated to be _________________
60sqft to 100 sqft
Other pathways systems include
Molding Messenger/support strand Perimeter raceway systems Furniture pathway systems Over floor duct Poke thru
For ADA compliance, a building is considered a place of public accomodation if it
- Is owned by a private entity
- It participates in business/activities that affect commerce
- Meets Title III guidelines in ADA act
ADA compliance affects _____, ______, and ______ since January 26, 1993.
Alterations, new construction, and acheiveable removable barriers
Minimum height of an outlet for ADA compliance
15in
Teletypewriter/ text telephone symbol and volume controlled phone symbol are required to be displayed ____________
to direct people to the nearest TTY location at any phone bank where TTY devices do not exist AND inside of a building where a TTY DOES exist
In newly constructed or altered buildings, ADA requires public phone banks to have at least _______ percent of devices to be equipped with volume controls.
25
Universal standard for mounting height of public phone (with these assumptions: _____________________)
48in
credit card reader/ coin slot located near bottom of the device
What feature(s)/part(s) of a public phone must be considered when determining mounting height?
Credit card reader/ coin slot
Phone handset
Text/TTY phone types permitted by ADA
Integrated TTY phone with conventional public phone
Conventional Portable TTY affixed to, or inside of, telephone enclosure
Requirements for TTY phone installation
1 power outlet
1 power cord
1 shelf with minimum dimensions of: 10”x10”x6” vert. clearance
Type of phone NOT acceptable as a TTY device
standard personal/cell phones, as they do not support use by a wide range of ADA users
ADA is considered to be this type of law
Civil Rights
ADA compliance is enforced through these means
in civil court when by lawsuit
Max. height for side reach phones
48in
Max height for side reach phones located above an obstruction
46in
Max height for forward reach phones
48in
Max height for forward reach phones over an obstruction
44in
Max allowable size of obstruction below side reach phone
24” wide, 34” tall
Max allowable size of obstruction below a forward reach phone
20in-25in
Three methods used for fiber optic connection to ER
Splice
Connector
Pull through
Maximum cable length of MM fiber
300m (1000ft)
Documents such as ______________and ___________provide additional information about cable bundle sizes and their efect on operating temperature. Standards bodies have also developed materials concerning bundle sizes, derating channel lengths, and other design and installation considerations.
TIA TSB-184-A
ISO/IEC TS 29125
___________ are a cable support system and not considered a raceway.
Cable trays
Cable
