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BICSI Questions and Answers: A Comprehensive Guide to Telecommunications Cabling, Exams of Telecommunications Engineering

A comprehensive overview of key concepts and definitions related to telecommunications cabling, as defined by bicsi standards. It covers various aspects, including signal transmission types, electromagnetic interference, signal characteristics, cabling components, and grounding systems. Presented in a question-and-answer format, making it easy to understand and retain information.

Typology: Exams

2024/2025

Available from 02/27/2025

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BICSI Questions & Answer, 100%
Correct | Grade A+
Simplex
โœ”: Transmits signals in only one direction (listener has no way to respond) and public address
system is example
Half duplex
โœ”: Transmits signals in both directions but only once at a time (push to talk systems)
Full duplex
โœ”: Transmits signals in both directions at the same time (telephones)
EMI
โœ”: Electromagnetic interference
Alternating current
โœ”: 0 โž– max โž– 0
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BICSI Questions & Answer, 100%

Correct | Grade A+

Simplex โœ”: Transmits signals in only one direction (listener has no way to respond) and public address system is example Half duplex โœ”: Transmits signals in both directions but only once at a time (push to talk systems) Full duplex โœ”: Transmits signals in both directions at the same time (telephones) EMI โœ”: Electromagnetic interference Alternating current โœ”: 0 โž– max โž– 0

Direct current โœ”: 0 โž– max (battery) RFI โœ”: Disturbance in electromagnetic signals Frequency โœ”: Number of cycles a signal is repeated in time period Bandwidth โœ”: Info carrying capacity of a system Analog signal โœ”: Continuously varying signals that follow loudness(AMPT) and frequency(tone) Digital signal โœ”: Non-continuous signal that changes from one state to another in a distinct order Decibel โœ”: Measure of analog signal strength

โœ”: Conductors and ground Impedance โœ”: Total opposition to current flow (AC circuits) Characteristic impedance โœ”: Input impedance of a uniform analog transmission line of infinite length Value of characteristic impedance โœ”: - Material & diameter of conductors

  • distance between conductors
  • insulating values of seperators Attenuation ( intersection loss ) โœ”: - measure of signal loss between transmitter and receiver
  • measure of signal loss in the amplitude when signal is transmitted
  • measure of decibels per unit length at a given frequency
  • loss of usable signal during g transmissions Return loss

โœ”: Decibels of the power of the outgoing signal to the power of the reflected signal Cross talk โœ”: Unwanted transfer of electromagnetic energy to 1 or more circuits Near end crosstalk (NEXT) โœ”: Unwanted signal coupling from a transmitter at the near end into another pair measured at the near end Far end crosstalk (FEXT) โœ”: Unwanted signal coupling from a transmitter at the near end into a neighboring pair measured at the far end Nominal velocity of propagation (NVP) โœ”: Ratio of Speed of transmission along a cable relative to the speed of light in a vacuum Propagation delay โœ”: Time it take for a signal to be transmitted from one end of a circuit to another Delay skew

Information technology systems (ITS) โœ”: - plain old telephone system (POTS)

  • voice over internet protocol (VolP)
  • unified messaging systems
  • videoconferencing
  • computer networking Differences between ITS systems โœ”: - structure of the building
  • cable and connection hardware
  • function of the ITS cabling installation
  • configuration of an existing cabling system
  • warranties
  • customer requests Standardized ITS systems โœ”: - Conformance to physical and transmission installation
  • consistency in cabling design and install
  • a basis of examining a proposed system
  • uniform documentation

SCS components โœ”: - backbone cabling and associated pathways

  • cross connection facilities
  • interconnection facilities
  • cabling methods
  • horz. Cabling and associated pathways
  • work areas
  • telecommunications outlets/connections
  • consolidation points (CPs)
  • multiuser telecom outlets assemblies (MUTOA)
  • transition points
  • centralized cabling
  • distributed cabling
  • admin (labeling, documentation) Inter-building backbone โœ”: Distribution of telecom services between buildings Intra-building backbone

RMC

โœ”: Rigid metallic conduit FMC โœ”: flexible metallic conduit RNC โœ”: Rigid nonmetallic conduit ATR โœ”: Straight section fully threaded round rod stock NRTL โœ”: Nationally recognized testing laboratories GRC โœ”: Galvanized rigid conduit IMC โœ”: Intermediate metallic conduit

CFDR

โœ”: Conduit fill defaming factor EF โœ”: Entrance facility BCT โœ”: Bonding conductor for telecom TMGB โœ”: Telecom main grounding bus bar ER โœ”: Equipment room TR โœ”: Telecom room TGB

โœ”: Private branch exchange GEC โœ”: Grounding electrode conductor ACEG โœ”: Alternating current equipment ground RGB โœ”: Rack grounding bus bar RBC โœ”: Ranch bonding conductor OSP โœ”: Lighting exposure for outside plant UTC โœ”: Under carpet telecom cable

BNC

โœ”: Bayonet Neil concelman S/FTP โœ”: Overall braid screen with foil screened twisted pair IDC โœ”: Insulation displacement contact TDR โœ”: Time domain deflectometer ACR โœ”: Attenuation to crosstalk ratio Align crosstalk (ATX) โœ”: Unwanted signal coupling from a disturbing pair of a 4-pair cable channel, permanent link, or component to a disturbed pair of another 4-pair channel, permanent link or component UTP

CMP

โœ”: Com. Plenum CMR โœ”: Com. Riser CMG โœ”: Com. General CM โœ”: Communications CMX โœ”: Com. Limited CMUC โœ”: Under carpet com. LSZH(LSF) โœ”: Low smoke zero halogen (low smoke and fume)

ESS

โœ”: Electric security systems AV โœ”: Audiovisual systems BAS โœ”: Building automation system IDC โœ”: Insulation displacement contact IPC โœ”: Insulation piercing contact TP โœ”: Interconnection point between horizontal cabling and under carpet telecom cable UTC