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Welcome
to Telecom Science
A Comprehensive Directory Dedicated to
Telecommunication Science Terminology
& Technology/Technological Words
National Command Authorities (NCA)
National
Communications System (NCS)
National
Coordinating Center (NCC) for Telecommunications
National
Electric Code� (NEC) National
Information Infrastructure (NII)
National
Security or Emergency Preparedness telecommunications National
Television Standards Committee standard natural
frequency network network
administration
network
architecture network busy
hour (NBH) network
connectivity network control
program (NCP)
network element
(NE) network engineering Network
File System network interface
network interface card (NIC)
network interface device (NID) network interface unit (NIU) network inward dialing (NID)
Network Layer network
management network manager network
operating system (NOS)
network
outward dialing (NOD) network
terminal number (NTN) network
terminating interface (NTI)
network
termination network
termination 1 (NT1) network
termination 2 (NT2)
network
topology network utility neutral
neutral direct-current
telegraph system neutral
ground
neutral operation neutral
relay new customer premises
equipment NF NFS
n -function nibble
NIC NID
NII nine-hundred
(900) service NIU nmi
NOD nodal clock nodal
point node noise
noise current noise
equivalent power (NEP) noise
factor noise figure (NF) noise
level noise power noise
power density
noise
suppression noise temperature noise
voltage noise weighting noise
window noisy black noisy
white
nominal bandwidth nominal bit stuffing rate nominal
linewidth nonassociated
common-channel signaling
nonblocking
switch non-call associated
signaling (NCAS) noncentralized
operation noncircularity
Np NRI NRZ
NRZ-M NS/EP
telecommunications n
-sequence NTI NTN NTSC
standard Nyquist interval Nyquist
rate Nyquist's theorem Open
Systems Interconnection (OSI)
Protocol Specification Open
Systems Interconnection--Reference Model (OSI--RM)
optical fiber optical
fiber cable optical fiber
coating optical transmitter
optical
waveguide packet switching packet-switching
network packet-switching
node
packet transfer mode PAM
phased array phase
delay
phase departure phase detector phase
deviation phase diagram
phase
difference phase
distortion phase-locked
loop (PLL)
phase measurement
tolerance phase modulation
(PM) polarization polarization diversity
polarization-maintaining
(PM) optical fiber polarization-preserving
(PP) optical fiber power
budget power circuit breaker
(PCB)
power density power factor power
failure transfer power gain
of an antenna power-law index
profile
power margin PROM prompt propagation
propagation constant propagation
mode propagation path
obstruction propagation time
delay proprietary standard proration
protected distribution system (PDS)
protected frequency protection
protection interval (PI)
protection
ratio protector protocol
protocol-control information protocol
converter
pulse amplitude pulse-amplitude
modulation (PAM) pulse
broadening pulse carrier pulse-code modulation (PCM)
pulse decay time pulse
distortion pulse duration pulse-duration
modulation (PDM)
pulse duty
factor pulse-frequency modulation (PFM) QA QAM QC
QOS QPSK
quad quadded
cable quadratic profile quadrature quadrature
amplitude modulation (QAM)
quadrature
modulation quadrature
phase-shift keying (QPSK)
quadriphase
quantization error quantization level quantization
noise quantized feedback radio
frequency assignment
radio
frequency channel assignment radio
frequency interference (RFI) radio
horizon radio horizon range (RHR)
radio
interface radiolocation radiolocation
land station radiolocation
mobile station radiolocation
service
radiological
monitoring radiometry radionavigation radionavigation
land station radionavigation
mobile station radionavigation-satellite
service sampling sampling
frequency
sampling interval sampling
rate sampling theorem satellite
satellite access satellite
communications satellite
Earth terminal
satellite
emergency position-indicating radiobeacon
satellite
link satellite network satellite
operation satellite
PBX
satellite
period satellite
relay signal signal
center
signal compression signal contrast signal
conversion equipment signal
distance signal distortion
signal droop signal
element signal expansion signal
frequency
shift signaling signaling path signaling
rate Signaling System No. 7
(SS7)
signaling time slot signal
intelligence signal level signal message signal-plus-noise-plus-distortion
to noise-plus-distortion ratio signal-plus-noise-to-noise
ratio (( S + N )/ N )
signal
processing signals security signal-to-crosstalk
ratio signal-to-noise ratio (SNR)
signal-to-noise ratio per bit
synchronization synchronization bit synchronization
code synchronization pulse
synchronizing
telecommand telecommunication
telecommunication
architecture telecommunications
center Telecommunications
Device for the Deaf (TDD) telecommunications
facilities telecommunications
management network (TMN)
telecommunications
security telecommunications
service Telecommunications
Service Priority (TSP)
service Telecommunications
Service Priority (TSP) system Telecommunications
Service Priority (TSP)
system user telecommunications
system telecommunications
system operator teleconference
telegram
telegraph telegraphy
telemetry telephone telephone
exchange telephone frequency telephone
number telephone sidetone telephony
telephoto teleprinter teleprocessing
teleseminar teleservice teletex
teletext teletraining teletypewriter
(TTY)
teletypewriter control
unit (TCU) teletypewriter
exchange service (TWX)
teletypewriter
signal distortion television
(TV)
television broadcast translator Telex� Telnet TEM
TEMPEST
time-division
multiple access (TDMA) time-division
multiplexing (TDM)
time-division
switching time-domain
reflectometer (TDR)
T1
(carrier) T1C (carrier) T2
(carrier) T3 (carrier) T4 (carrier) T5
(carrier)
video
teleconference videophone voice frequency (VF)
voice
frequency carrier
telegraph (VFCT)
voice-frequency
(VF) channel voice frequency
(VF)
primary patch bay voice-frequency
telegraph (VFTG)
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