Cabling Flashcards
Balun
A balanced to unbalanced circuit coupling device used to convert from unbalanced to Balance transmission provides impedance matching when connecting twisted-pair to coaxial cables
Grade 2 residential cable requirements
2 cat 5E and 2 coaxial cable’s
Attenuation
Signal loss decrease in magnitude of transmission signal strength between points.similar to voltage drop
Pair to pair couple
Transfer of unwanted energy from one circuit or pair to another
Power sum next
Undesired coupling of signal energy from a number of simultaneously transmitting pairs into a receiving pair
Class one administration
Number of TR’s and no backbone cabling or outside plant cabling system
ADO
Provides meals for a tenant to disconnect from access provider
Equipment room
Centralize space for telecommunications equipment that serves occupants of the building sometimes two rooms one voice and one data usually where utility comes into a building
Residential cable requirements
Grade 1 Dash minimum requirements for telecom services , Telephone, satellite cat tv and data services
Grade 2 – provides a generic cabling system that meets the requirements for basic advanced and multimedia telecommunication services
CMP
Plenum cable
CMX
Residential cable
CG
General purpose
CMR
Riser cable
Work area
A building space where the occupants interact with telecommunications terminal equipment
Application dependent design
Specific cable type and connectors for a design
Structured cabling system
Horizontal cabling, backbone cabling, Work area, telecom rooms, equipment rooms, entrance facility, administration
Cross talk and how different jacks are better for increasing performance
T568A and T568B not USOC
Equipment room admin color
Purple
Wire map test
Basic test for test circuits for open or short-circuits cross pairs reversed wires and split pairs
GE
Grounding equalizer – large multi story buildings, interconnects elements of telecommunications grounding infrastructure
TBB
Telecommunication bonding backbone – interconnects all TGBS with TMGBS
TGB
Telecom grounding Busbar
TMGB
Telecom main grounding bus bar
Horizontal cabling
Max 295 feet, 90 meters-portion of telecom cabling system that extends from work area telecom outlet to the horizontal cross connect in telecom room
Includes horizontal cables telecom out works in work areas mechanical terminations and patch cords or jumpers located in TR
Cat 5E
100 MHz, 110 ohms twisted pair cable
Coax Cable
Conductor, plastic jacket, wire mesh,outer jacket
Patch cord maximum length
16 feet
Permanent link test
Test configuration used by data telecommunication systems designs in users to verify performance of permanently installed cable
Channel test
Test configuration use by data telecommunications systems designer and user to verify performance of overall channel
What does twisting pairs do to the performance of the cable
Reduces crosstalk capacitive coupling
While the pipe fill
Three or more – 40%
NECs main concern with fire and structured cabling
Flammability of cable
Bend radius on UTP cables
4x the diameter
Support distance on cabling
5 feet
Labeling requirements
12 inches back from the end of the cable and generated from mechanical device
110 block
Better application at high frequencies, 110 blocks can accommodate six cables in a row
Coax connectors
Type F – frequently used
Type BNC – security applications (Data applications)
Type N-not as common
Bit rate
Transmission of binary signal measured in bits per second
AT&T bonding clamp
Used for grounding
Overvoltage protection
Accomplished using – carbon block airgap, gas tube, solid-state Protector units
Gas tube is preferred over carbon block airgap because they become pitted and create carbon buildup and dust
Elements of administration
Class 1–1 telecom room same building
Glass two – more than one telecom room same building
Class III – multiple buildings the same campus
Glass for – multiple sites same network
