:
  
  
  
  
  

: : (")

"busy back" jack "": (")
"clear the line" call, lightning call "", : (")
"clear the line" call, lightning call "", : (")
"faulty line", "line in trouble" : (")
"off" period , : (")
"off" period , : (")
"on" period , : (")
"on" period , : (")
"who are you" signal, WRU signal " ": (")
2854 K tungsten sensitivity , -2854
.
: (")
2854 K tungsten sensitivity , -2854
.
: (")
5 unit start-stop []: (")
5 unit synchronous []: (")
5-unit code : (")
500 / 20 signalling 500/20: (")
500 point selector 500 : (")
?-mode ? [], ? []
" .
: (")
?-mode ? [], ? []
" .
: (")
?-network ", ?
? .
: (")
?-network ", ?
? .
: (")
A-digit selector ' [: ]: (")
A-pole, A-fixtures : (")
A-position ': (")
A-position demand working : (")
abnormal glow discharge : (")
absolute level, absolute power level , , : (")
absolute level, absolute power level , , : (")
absolute level, absolute power level , , : (")
absorption wave-meter , : (")
absorption wave-meter , : (")
accelerating electrode
(" )
: (")
acceleration space : (")
acceptor level : (")
acceptor, acceptor circuit , : (")
acceptor, acceptor circuit , : (")
access selector : (")
accessories: (")
accumulator: (")
acknowledgement signal : (")
acorn tube : (")
acoustic pressure, sound pressure : (")
acoustic shock : (")
activation [ ']
: .
: (")
activation energy
: .
: (")
activator, : (")
activator, : (")
active transducer : (")
adapter: (")
adjacent channel : (")
adjacent exchange : (")
adjustment: (")
admittance: (")
advised duration call, A.D.C. , ": (")
advised duration call, A.D.C. , ": (")
aerial cable, overhead cable : (")
ageing, aging [ "]: (")
air core : (")
air gap : (")
air gap protector, air gap lightning arrestor : (")
air space cable, dry core cable : (")
alarm: (")
alarm circuit : (")
alarm fuse : (")
alarm lamp : (")
alarm signal : (")
aligned grid tube : (")
all-pass network : (")
allotter: (")
alpha particle : (")
alpha rays : (")
alphabetic telegraphy =: (")
alternating current bell, A.C. bell , ": (")
alternating current bell, A.C. bell , ": (")
alternating current, A.C. , ": (")
alternating current, A.C. , ": (")
alternating-current pulsing, A.C.P. , ": (")
alternating-current pulsing, A.C.P. , ": (")
alternative routing, re-routing : (")
alternator , ": (")
alternator , ": (")
altimeter : (")
amateur, ham, : (")
amateur, ham, : (")
ambient temperature : (")
ammeter, ampere-meter , : (")
ammeter, ampere-meter , : (")
ampere-hour : (")
ampere-turns : (")
amplification, : (")
amplification, : (")
amplification factor [of an electronic tube], mu factor ,
" mu.
: (")
amplification factor [of an electronic tube], mu factor ,
" mu.
: (")
amplifier, repeater [, ; ' ]: (")
amplitude, : (")
amplitude, : (")
amplitude / amplitude distortion, amplitude distortion [deprecated] , : (")
amplitude / amplitude distortion, amplitude distortion [deprecated] , : (")
amplitude change signalling : (")
amplitude modulated transmitter, A.M. transmitter , ": (")
amplitude modulated transmitter, A.M. transmitter , ": (")
amplitude modulation, A.M. , ": (")
amplitude modulation, A.M. , ": (")
analysis meter : (")
ancillary circuit, auxiliary circuit : (")
ancillary jack, auxiliary jack : (")
and-circuit "": (")
angle bracket : (")
angle modulation : (")
angle of arrival : (")
angle of departure : (")
angle of elevation : (")
angle of incidence : (")
annealed wire : (")
anode breakdown voltage : (")
anode dark space : (")
anode fall, anode potential fall , : (")
anode fall, anode potential fall , : (")
anode glow : (")
anode region : (")
anode resistance, anode differential resistance , : (")
anode resistance, anode differential resistance , : (")
anode sputtering : (")
anode, plate [of an electronic tube]: (")
anomalous displacement current : (")
answer meter signal : (")
answer non-meter signal : (")
answer-back code : (")
answering cord : (")
answering equipment : (")
answering jack : (")
answering plug : (")
antenna, aerial,
(" , " )
: (")
antenna, aerial,
(" , " )
: (")
anti-induction network : (")
anti-sidetone circuit , : (")
anti-sidetone circuit , : (")
anti-sidetone device
: .
: (")
antinode, loop: (")
aperiodic : (")
aperiodic antenna, untuned antenna : (")
aperture distortion : (")
aperture [fascimile transmitter, photo-receiver]; span [between poles etc.] [1. , ; 2. "]: (")
apex inductor : (")
apparent resistance : (")
arc: (")
arc cathode : (")
arc-drop loss : (")
arc-through loss of control : (")
arc-voltage-drop , : (")
arc-voltage-drop , : (")
arm brace, cross arm brace : (")
arm extension bracket : (")
arm seat, arm socket [ ]: (")
armature [ , "]: (")
armature reaction : (")
arming of poles, arrangement of pole attachments : (")
armoured cable : (")
armouring with interlocking wires : (")
array [ ]: (")
articulation, : (")
articulation, : (")
articulation reference equivalent , : (")
articulation reference equivalent , : (")
artificial black signal, nominal black signal : (")
artificial load : (")
artificial traffic : (")
artificial white signal, nominal white signal , : (")
artificial white signal, nominal white signal , : (")
aspect ratio : (")
assignment key : (")
assistance code
: ( ).
: (")
assistance traffic : (")
Aston dark space : (")
asynchronous: (")
atmosphere: (")
atmospherics, statics : (")
atom: (")
atomic nucleus : (")
atomic number : (")
atomic weight : (")
attendant's set : (")
attended call office, C.O. , ": (")
attended call office, C.O. , ": (")
attenuation: (")
attenuation coefficient, attenuation constant : (")
attenuation equalizer : (")
attenuation frequency distortion, amplitude frequency distortion , , , : (")
attenuation frequency distortion, amplitude frequency distortion , , , : (")
attenuation frequency distortion, amplitude frequency distortion , , , : (")
attenuation frequency distortion, amplitude frequency distortion , , , : (")
attenuator: (")
audible: (")
audio frequency, A.F.
:
: (")
audition : (")
aural, , : (")
aural, , : (")
aural, , : (")
auto-manual exchange : (")
auto-switching centre : (")
auto-transfer : (")
auto-transformer : (")
autodyne: (")
automatic: (")
automatic case shift : (")
automatic error correction : (")
automatic error detection : (")
automatic exchange; dial central office [US] : (")
automatic frequency control, A.F.C. , ": (")
automatic frequency control, A.F.C. , ": (")
automatic numbering transmitter : (")
automatic reperforator switching, fully automatic reperforator switching : (")
automatic repetition, Verdan system , : (")
automatic repetition, Verdan system , : (")
automatic retransmission : (")
automatic signalling : (")
automatic switching system : (")
automatic telegraphy : (")
automatic telephone system, dial system : (")
automatic telephone, automatic telephone set; dial telephone [US], dial telephone set [US] : (")
automatic transmitter, automatic telegraph transmitter : (")
automatic volume control, A.V.C. , ": (")
automatic volume control, A.V.C. , ": (")
auxiliary electrode
(" )
: (")
auxiliary screw arc : (")
available power , : (")
available power , : (")
average holding time , : (")
average holding time , : (")
average voltage : (")
B-position ': (")
babble: (")
back conductance : (")
back electromotive force, back e.m.f.
(" ) (" )
: (")
back resistance : (")
backfire, arc-back : (")
background noise : (")
backward busying, group control : (")
backward hold : (")
backward recall signal , : (")
backward recall signal , : (")
backward signalling : (")
bad operation, B.O. , ": (")
bad operation, B.O. , ": (")
baffle: (")
balance return-loss : (")
balanced: (")
balanced transmission line : (")
balanced two-terminal-pair network : (")
balancing, balance: (")
ballast lamp : (")
ballast resistor : (")
band spread : (")
band-pass filter : (")
band-pass to low-pass and analogy : (")
band-stop filter, band-elimination filter : (")
bandwidth : (")
barred code : (")
barred trunk service : (")
barretter: (")
barrier layer : (")
barrier layer capacitance : (")
base plate : (")
base region : (")
base, base of tube, : (")
base, base of tube, : (")
basic group : (")
basic noise : (")
basic supergroup : (")
bass compensation : (")
bass control : (")
battery: (")
battery charger : (")
battery lead, power lead : (")
battery loop : (")
battery pulsing, battery dialling : (")
battery supply bridge : (")
battery supply coil : (")
battery testing : (")
baud: (")
bay, bay of racks, : (")
bay, bay of racks, : (")
bayonet joint : (")
BC-digit selector ' ' [: -]: (")
beacon: (")
beam: (")
beam current [at a specified point] : (")
beam-power tube : (")
beat: (")
beat-frequency oscillator, B.F.O. , ": (")
beat-frequency oscillator, B.F.O. , ": (")
beating: (")
bel: (")
bell set, station ringer: (")
beta particle
: .
: (")
beta rays
: .
: (")
betatron: (")
bias: (")
bias current : (")
bias distortion : (")
bifilar winding, double winding : (")
binary code : (")
binary digit, bit , ": (")
binary digit, bit , ": (")
binder, tie, : (")
binder, tie, : (")
binding wire, tie wire : (")
bipolar : (")
black and white reception : (")
blackening: (")
blade: (")
blanketing: (")
blanking pulse : (")
blanking [of channel] [ ]: (")
bleader resistor : (")
block diagram : (")
blocking: (")
blocking period , : (")
blocking period , : (")
blooming [ ]: (")
Bohr atom , : (")
Bohr atom , : (")
bolometer: (")
bolt: (")
Boltzmann equation : (")
bonding strip, bonding ribbon : (")
booster : (")
booster battery metering : (")
bothway circuit, two-way circuit : (")
bound electron
(" )
: (")
braid, braiding: (")
braided cable, braid covered cable : (")
branch: (")
branch jack : (")
break contact : (")
break jack, cut-off jack : (")
break pulse, break impulse : (")
break-contact unit : (")
break-in operation : (")
break-in, listening-through : (")
breakdown signal : (")
breakdown voltage [ ]: (")
breakdown, breakdown in a gas, : (")
breakdown, breakdown in a gas, : (")
breakdown, breakdown of line,
(" )
: (")
breakdown, breakdown of line,
(" )
: (")
breaking-down [ ]: (")
breastplate microphone, breastplate transmitter : (")
bridge control switchboard : (")
bridge duplex system : (")
bridge megger , : (")
bridge megger , : (")
bridge network, lattice network , : (")
bridge network, lattice network , : (")
bridge-control cord circuit : (")
bridged T-network , T : (")
bridged T-network , T : (")
brightness: (")
brilliance: (")
Britannia []: (")
broadcast , : (")
broadcast , : (")
broadcast system : (")
broadside array , : (")
broadside array , : (")
brush discharge : (")
buffer stage, buffer amplifier , : (")
buffer stage, buffer amplifier , : (")
building-out network : (")
bulb, envelope [ ]: (")
buncher space : (")
buncher, input resonator, : (")
buncher, input resonator, : (")
bunching: (")
burnout of a crystal rectifier : (")
bush, bushing: (")
busy hour-to-day ratio : (")
busy hours : (")
busy marker "": (")
busy tone, engaged tone, busy signal "": (")
busy, engaged: (")
busy-flash signal "": (")
buzzer
(" )
: (")
C-network ", C: (")
C-network ", C: (")
C.S.H. alarm ": (")
cable: (")
cable bearer : (")
cable brackets, cable hooks : (")
cable cleat, cable clamp : (")
cable code : (")
cable core : (")
cable distribution head, cross-connecting terminal, : (")
cable distribution head, cross-connecting terminal, : (")
cable drum, cable reel : (")
cable form : (")
cable grip [ ]: (")
cable hut : (")
cable jointer, splicer: (")
cable lug : (")
cable rack : (")
cable support rack : (")
cable turning section, dummy section : (")
cabling: (")
cage antenna : (")
calculagraph: (")
call count, peg call : (")
call distribution : (")
call indicator : (")
call queueing system , : (")
call queueing system , : (")
call sign [ , ']: (")
call ticket : (")
call, telephone call, : (")
call, telephone call, : (")
call-count meter : (")
call-indicator position : (")
call-indicator working : (")
call=back, consultation call ,
: ( ").
: (")
call=back, consultation call ,
: ( ").
: (")
called exchange, terminating office; terminating toll center, T.T.C. [US] : (")
called subscriber : (")
called subscriber held, C.S.H. , ": (")
called subscriber held, C.S.H. , ": (")
called-party release , : (")
called-party release , : (")
called-sub-answer pick=up : (")
calling cord : (")
calling exchange, originating office; originating toll center, O.T.C. [US] : (")
calling lamp : (")
calling rate : (")
calling signal, line signal : (")
calling subscriber, originating subscriber : (")
calling-line identification : (")
calling-party release, calling-subscriber release , : (")
calling-party release, calling-subscriber release , : (")
camera tube : (")
cancelled call , : (")
cancelled call , : (")
cancelled, CCL, ': (")
cancelled, CCL, ': (")
capacitive: (")
capacitor, condenser: (")
carbon block protector : (")
carbon granules
; (Nasturtium); .
: (")
carbon microphone : (")
carriage return : (")
carrier channel, carrier current channel : (")
carrier current [" ]: (")
carrier telegraphy : (")
carrier telephony : (")
carrier transmission , : (")
carrier transmission , : (")
carrier, carrier wave , : (")
carrier, carrier wave , : (")
carrier-frequency pulse : (")
carrying capacity, carrying capacity of a selector , : (")
carrying capacity, carrying capacity of a selector , : (")
cascade amplifier, multistage amplifier : (")
cascode amplifier, Wallman amplifier : (")
case shift : (")
catcher space : (")
catching diode : (")
cathode: (")
cathode border : (")
cathode dark space, Hittorf dark space, Crookes dark space ,
: (" )
: (")
cathode dark space, Hittorf dark space, Crookes dark space ,
: (" )
: (")
cathode fall, cathode potential fall , : (")
cathode fall, cathode potential fall , : (")
cathode follower : (")
cathode glow : (")
cathode heating time : (")
cathode interface impedance
: interface.
: (")
cathode keying : (")
cathode ray : (")
cathode region : (")
cathode spot : (")
cathode sputtering : (")
cathode-ray tube , ": (")
cathode-ray tube , ": (")
cathodoluminescence : (")
catwisker: (")
cavity magnetron : (")
cavity resonator : (")
central battery signalling exchange, C.B.S. exchange , ": (")
central battery signalling exchange, C.B.S. exchange , ": (")
central battery signalling, C.B.S. , ": (")
central battery signalling, C.B.S. , ": (")
central battery system, common battery system, C.B.-system : (")
central battery telephone set, common battery telephone set, C.B. telephone set , ": (")
central battery telephone set, common battery telephone set, C.B. telephone set , ": (")
central battery, common battery, C.B. , ": (")
central battery, common battery, C.B. , ": (")
centre holes, feed holes : (")
centre-holes per minute : (")
centre-stable relay, neutral relay [deprecated] : (")
chadless perforation : (")
chain []: (")
change=over contact : (")
change=over contact unit : (")
change=over key : (")
change=over switch : (")
change=over time, transit time [ ]: (")
changed number interception " ": (")
channel: (")
channel translating equipment : (")
characteristic curve, characteristic, : (")
characteristic curve, characteristic, : (")
characteristic distortion : (")
characteristic equation [ ]: (")
characteristic impedance : (")
charge: (")
charge / mass ratio, specific charge : (")
charge of the electron
(" )
: (")
charge-exchange phenomenon : (")
chargeable time clock : (")
chargeable time indicator : (")
charged particle, carrier , : (")
charged particle, carrier , : (")
charger: (")
charging, charge: (")
chassis [ ']: (")
Chebyshev approximation ': (")
Child-Langmuir equation ' : (")
choke, choke coil: (")
chopper: (")
chopper disc : (")
circuit breaker : (")
circuit element : (")
circuit noise , : (")
circuit noise , : (")
circuit out of order : (")
circuit, line [telephone]: (")
circularly polarized : (")
circularly polarized wave : (")
clamping circuit, clamp, clamper , : (")
clamping circuit, clamp, clamper , : (")
class A. B. C. amplifier ', ', ': (")
class A. B. C. amplifier ', ', ': (")
class A. B. C. amplifier ', ', ': (")
clean=up [ ]: (")
clear-back signal : (")
clear-forward signal : (")
clearance [of pole lines] , : (")
clearance [of pole lines] , : (")
clearance; interstice: (")
clearing lamp, supervisory lamp : (")
clearing of fault : (")
clearing signal, disconnect signal : (")
clearing, disconnecting []: (")
clicks, : (")
clicks, : (")
clip []: (")
clip position, dead sector : (")
clipper: (")
clipping [speech] []: (")
clipping [waveform], chopping [waveform] : (")
closed circuit : (")
closed-circuit operation : (")
coating: (")
coaxial cable, concentric cable : (")
coaxial circuit : (")
coaxial pair : (")
code: (")
code conversion : (")
code converter : (")
code element
: (" , " , " , " )
: (")
code ringing : (")
code selector : (")
code translation : (")
coded call-indicator working : (")
coder, encoder: (")
coding: (")
coefficient of occupation, call fill : (")
coercive force
(" )
: (")
coercivity: (")
coil: (")
coil loaded cable : (")
coil loading , : (")
coil loading , : (")
coin collecting box, C.C.B., unattended call office , , ": (")
coin collecting box, C.C.B., unattended call office , , ": (")
coin collecting box, C.C.B., unattended call office , , ": (")
cold cathode : (")
collector [ ]: (")
collector: (")
collector junction : (")
collinear array [ ]: (")
collision excitation [ ]: (")
collision ionization [ ]: (")
collision of the first kind : (")
collision of the second kind : (")
colour temperature : (")
combined distribution frame, C.D.F. , ": (")
combined distribution frame, C.D.F. , ": (")
common base connection : (")
common battery central office, C.B. exchange, central battery exchange , ": (")
common battery central office, C.B. exchange, central battery exchange , ": (")
common branch, mutual branch : (")
common control system , : (")
common control system , : (")
common trunk" : (")
common-collector connection : (")
common-emitter connection : (")
communication chart : (")
commutation: (")
commutator: (")
companding : (")
compandor [' -]: (")
compensation: (")
compensation theorem : (")
compensation, compensation in facsimile,
: (" , " )
: (")
compensation, compensation in facsimile,
: (" , " )
: (")
compensator: (")
completely restricted extension : (")
composite cable : (")
composite circuit : (")
composite filter : (")
compound: (")
compound signal : (")
compound winding : (")
compression [; ]: (")
compressor: (")
concentration position : (")
concentrator: (")
concentric : (")
condensed-mercury temperature : (")
conductance: (")
conducting period , : (")
conducting period , : (")
conduction: (")
conduction band : (")
conduction current : (")
conductive: (")
conductivity : (")
conductor, conducting substance: (")
cone [ ]: (")
conference call
: .
: (")
conference circuit
: .
: (")
conference system
: .
: (")
configuration: (")
congestion []: (")
conjugate impedances : (")
connecting circuit : (")
connecting cord : (")
connecting tag, connecting lug : (")
connector [: , ']: (")
console: (")
constant current generator : (")
constant-K filter K: (")
constant-resistance network : (")
constitution of matter : (")
contact ampere-hour meter , : (")
contact ampere-hour meter , : (")
contact bank, bank, bank of contacts : (")
contact follow : (")
contact pressure : (")
contact unit : (")
contact voltmeter , : (")
contact voltmeter , : (")
contact [part] [; ' ]: (")
contact [state] [; ' ]: (")
contact-potential barrier [ ]: (")
contact-potential difference [ ]: (")
contactor: (")
continuity: (")
continuity test : (")
continuous level : (")
continuous loading, Krarup loading , *: (")
continuous loading, Krarup loading , *: (")
continuous service, 24 hour service : (")
continuous twisting : (")
continuous wave : (")
continuously loaded cable *: (")
contour: (")
contrast range : (")
control, []: (")
control, []: (")
control characteristic : (")
control electrode
(" )
: (")
control grid : (")
control ratio : (")
control, inspection, supervision, : (")
control, inspection, supervision, : (")
controlled ringing facility, holding a subscriber line [by toll operator (US)] [- -]: (")
convection current , : (")
convection current , : (")
conversation time : (")
conversion efficiency [ ]: (")
conversion loss of a frequency-changer crystal : (")
conversion transconductance , : (")
conversion transconductance , : (")
converter: (")
coplanar : (")
copper slug, copper head, copper tube [ ]: (")
cord: (")
cord circuit : (")
cord fastener [" ]: (")
cordless switchboard : (")
corona, corona discharge, : (")
corona, corona discharge, : (")
correcting signal : (")
cosine-squared pulse : (")
cosmic rays : (")
cotton-covered paper-core cable , : (")
cotton-covered paper-core cable , : (")
counterpoise earth : (")
counting circuit : (")
country satellite exchange : (")
coupler: (")
coupling: (")
coupling key, grouping key : (")
coupling probe : (")
cradle [ ]: (")
criterion of degeneracy : (")
critical coupling : (")
critical grid current : (")
critical grid voltage : (")
critical-voltage parabola, cut-off parabola [ ]: (")
cross-connection field, jumper field : (")
cross-modulation : (")
crossbar switch : (")
crossing, crossing of lines, , : (")
crossing, crossing of lines, , : (")
crossing, crossing of lines, , : (")
crossover: (")
crosstalk attenuation : (")
crosstalk meter : (")
crosstalk, overhearing : (")
crystal diode, crystal rectifier , : (")
crystal diode, crystal rectifier , : (")
crystal frequency-changer efficiency : (")
crystal video rectifier : (")
cue []: (")
cumulative ionization : (")
current: (")
current bias : (")
current consumption : (")
current gain : (")
current sensitivity of a crystal rectifier : (")
current surge : (")
current-biased : (")
current-fed : (")
current-reversing key , : (")
current-reversing key , : (")
curvature: (")
curvilinear
(" )
: (")
cut-off point : (")
cut-off relay : (")
cut-off switch , : (")
cut-off switch , : (")
cut-off voltage : (")
cut-out, : (")
cut-out, : (")
cutting plier, cutting pliers : (")
cycle: (")
cycle per second, cps, c/s, hertz, : (")
cycle per second, cps, c/s, hertz, : (")
cyclic: (")
cyclotron: (")
daily fixed time call, D.F.T.C. , ": (")
daily fixed time call, D.F.T.C. , ": (")
damping: (")
dark burn, fatigue, ion spot, : (")
dark burn, fatigue, ion spot, : (")
dark current : (")
dark-trace screen [ ]: (")
dark-trace tube, skiatron : (")
de=emphasis : (")
de=ionization : (")
de=ionization rate , : (")
de=ionization rate , : (")
de=ionized : (")
de=ionizing grid : (")
dead spot : (")
decay time : (")
decelerating electrode
(" )
: (")
decibel: (")
decineper: (")
decoder: (")
decrement: (")
decremeter : (")
deferred call, call filed for later completion : (")
deflecting coil : (")
deflecting electrode, deflector plate ,
(" )
: (")
deflecting electrode, deflector plate ,
(" )
: (")
deflecting voltage [ ]: (")
deflecting yoke , : (")
deflecting yoke , : (")
deflection: (")
deflection coefficient [ ]: (")
deflection defocusing : (")
deflection sensitivity of a magnetic-deflection cathode-ray tube : (")
deflection sensitivity of a magnetic-deflection cathode-ray tube and yoke assembly : (")
deflection sensitivity of an electrostatic-deflection cathode-ray tube
(" )
: (")
degassing : (")
degenerate gas : (")
delay, : (")
delay, : (")
delay equalizer : (")
delay frequency distortion , : (")
delay frequency distortion , : (")
delay lamp , "": (")
delay lamp , "": (")
delay line, delay network ,
(" )
: (")
delay line, delay network ,
(" )
: (")
delay working, delay basis operation : (")
delayed action, slow operation , : (")
delayed action, slow operation , : (")
delayed automatic volume control : (")
delayed call : (")
delayed fault , ": (")
delayed fault , ": (")
demagnetized, degaussed : (")
demand service, demand working, combined line and recording operation, C.L.R. operation : (")
demodulated : (")
demodulation : (")
demodulator : (")
density modulation [ ]: (")
density of an electron beam
(" )
: (")
density of an ion beam : (")
density of electrons, concentration of electrons ,
(" )
: (")
density of electrons, concentration of electrons ,
(" )
: (")
dependent exchange : (")
depletion layer : (")
derived units : (")
derrick pole : (")
desiccating cylinder : (")
desiccation, drying-out, : (")
desiccation, drying-out, : (")
desiccator [ ]: (")
designation strip : (")
detached manual board : (")
detector: (")
deuteron: (")
deviation ratio : (")
dial: (")
dial key, dialling key : (")
dial speed test : (")
dial tester : (")
dial tone, dialling tone : (")
dialling: (")
dialling-in : (")
dialling-in to a P.A.B.X. ": (")
dialling-out : (")
diaphragm [ ]: (")
dielectric []: (")
dielectric breakdown : (")
dielectric constant, relative permittivity, specific inductive capacity , : (")
dielectric constant, relative permittivity, specific inductive capacity , : (")
dielectric strain : (")
dielectric stress : (")
differential [' ]: (")
differential duplex system : (")
differential relay : (")
differential signalling : (")
differential winding [ ]: (")
differentiated pulse signalling : (")
differentiating circuit, differentiator : (")
diffraction; by-pass: (")
diffusion, : (")
diffusion, : (")
diffusion length , : (")
diffusion length , : (")
digit: (")
digit absorbing selector : (")
digit absorption : (")
digit-key strip []: (")
dimmer [, ']
: .
: (")
diode: (")
diode characteristic [ -]: (")
dip of current : (")
diplex operation : (")
dipole, dipole antenna, doublet, doublet antenna , : (")
dipole, dipole antenna, doublet, doublet antenna , : (")
direct capacitance : (")
direct coupling : (")
direct current bell, D.C. bell , ": (")
direct current bell, D.C. bell , ": (")
direct current restorer, D.C. restorer , ": (")
direct current restorer, D.C. restorer , ": (")
direct current signalling, D.C. signalling , ": (")
direct current signalling, D.C. signalling , ": (")
direct current, D.C. , ": (")
direct current, D.C. , ": (")
direct dialling [ ]: (")
direct impedance : (")
direct interelectrode capacitance
(" )
: (")
direct printer : (")
direct recording : (")
direct wave : (")
direct-current telegraphy : (")
direction finder, D.F. : (")
directivity [ ']: (")
directly heated cathode, filamentary cathode, filament , : (")
directly heated cathode, filamentary cathode, filament , : (")
director []: (")
director exchange : (")
director system : (")
disc recording, record []; [], []: (")
disc recording, record []; [], []: (")
disc recording, record []; [], []: (")
disc-seal tube : (")
discharge []: (")
discharger: (")
disconnection, "DIS", "break", "open", : (")
disconnection, "DIS", "break", "open", : (")
discontinuity : (")
discrete level : (")
discriminating satellite exchange : (")
discriminating selector : (")
discriminating selector repeater, D.S.R. , ": (")
discriminating selector repeater, D.S.R. , ": (")
discriminating selector working : (")
discriminator: (")
disintegration: (")
dispenser cathode , : (")
dispenser cathode , : (")
dispersion: (")
display panel : (")
disruptive discharge : (")
dissector tube : (")
dissipation factor : (")
dissipative attenuation : (")
distortion [' ]: (")
distress, [ "]: (")
distress, [ "]: (")
distress signal, SOS : (")
distributed capacitance, distributed capacity : (")
distributing box, distributing terminal : (")
distribution: (")
distribution cable : (")
distribution frame : (")
distribution of traffic carried : (")
distribution point : (")
distributor: (")
diurnial variations : (")
diversity reception : (")
dividing network : (")
dog, detent, [ ]: (")
dog, detent, [ ]: (")
donor: (")
donor level : (")
dot frequency
(" , " )
: (")
dot, Morse dot,
: .
: (")
dot, Morse dot,
: .
: (")
double armature relay : (")
double dog , : (")
double dog , : (")
double pole: (")
double-cord switchboard : (")
double-current signalling : (")
double-ended cord : (")
double-sideband transmission , : (")
double-sideband transmission , : (")
double-sided rack : (")
double-throw switch : (")
down lead : (")
drain []: (")
drain [ ]: (")
dressing of cable, beating-in of cable : (")
drift: (")
drift conductivity : (")
drift space : (")
drift tunnel : (")
drift velocity, drift speed : (")
drive voltage : (")
driving pawl : (")
driving point admittance, input admittance : (")
driving stage, driver , : (")
driving stage, driver , : (")
driving-point impedance, input impedance : (")
drop indicator : (")
dropping resistor : (")
drum speed : (")
dry joint, faulty soldered joint : (")
dual capacitor : (")
duct cleaner, duct cleaning tool : (")
duct plug : (")
duct, conduit []: (")
dummy antenna : (")
duplex , : (")
duplex , : (")
duplex circuit : (")
duplex operation : (")
dust core coil, iron-dust core coil ,
: .
: (")
dust core coil, iron-dust core coil ,
: .
: (")
dust core, iron-dust core
: .
: (")
duty factor : (")
dynamic characteristic : (")
dynamic luminous sensitivity [ ]: (")
dynamic sensitivity [ ]: (")
dynamotor: (")
dynatron characteristic : (")
dynatron effect : (")
dynode: (")
earcap, earpiece: (")
earth testing , : (")
earth testing , : (")
earth wire, ground wire : (")
earth-phantom circuit : (")
earth-phantom pulsing : (")
earthed, grounded: (")
earthing circuit, grounding circuit : (")
earthing percentage : (")
echo attenuation : (")
echo path : (")
echo sounder : (")
echo suppressor : (")
eddy current : (")
effect,
(" , " , " )
: (")
effect,
(" , " , " )
: (")
effective bandwidth
(" )
: (")
effective call, completed call, completed message : (")
effective collision cross-section [ ]: (")
effective cut-off frequency
(" )
: (")
effective input admittance
(" )
: (")
effective input capacitance
(" )
: (")
effective input impedance
(" )
: (")
effective output admittance
(" )
: (")
effective output capacitance
(" )
: (")
effective output impedance
(" )
: (")
effective transmission
(" )
: (")
efficiency of rectification : (")
Einstein's law : (")
elastance: (")
electric arc []: (")
electric circuit : (")
electric screen, electrostatic screen [deprecated] : (")
electrification of gas : (")
electro-luminescence : (")
electrode
(" )
: (")
electrode admittance
(" )
: (")
electrode bias ,
(" )
: (")
electrode bias ,
(" )
: (")
electrode characteristic
: (" )
: (")
electrode conductance
(" )
: (")
electrode current [ ]
(" )
: (")
electrode dissipation
(" )
: (")
electrode impedance
(" )
: (")
electrode radiator
(" )
: (")
electrode reactance
(" )
: (")
electrode resistance
(" )
: (")
electrode support
(" )
: (")
electrode susceptance
(" )
: (")
electrode voltage
(" )
: (")
electrode-current averaging time , , ,
(" )
: (")
electrode-current averaging time , , ,
(" )
: (")
electrode-current averaging time , , ,
(" )
: (")
electrode-current averaging time , , ,
(" )
: (")
electrolyte
(" )
: (")
electrolytic tank
: .
: (")
electromagnet
(" )
: (")
electromagnetic lens
(" )
: (")
electromagnetic receiver
(" )
: (")
electromagnetic screen
(" )
: (")
electromechanic
(" )
: (")
electrometer
(" )
: (")
electrometer tube
(" )
: (")
electromotive force, e.m.f. , "
(" ) (" )
: (")
electromotive force, e.m.f. , "
(" ) (" )
: (")
electron
(" )
: (")
electron avalanche
(" )
: (")
electron beam
(" )
: (")
electron collector [ ]
(" )
: (")
electron current
(" )
: (")
electron emission
(" )
: (")
electron flow
(" )
: (")
electron gas
(" )
: (")
electron gun
(" )
: (")
electron injector
(" )
: (")
electron lens
(" , " , " ) (" )
: (")
electron microscope*
: .
: (")
electron mirror
(" )
: (")
electron multiplier [ ]
(" )
: (")
electron optics
(" )
: (")
electron pair bond, covalent bond, valence bond
(" )
: (")
electron sheath
(" )
: (")
electron telescope*
(" , " ) (" )
: (")
electron trajectory
(" )
: (")
electron transition
(" )
: (")
electron tube, electronic tube
(" )
: (")
electron velocity, electron drift
(" )
: (")
electron-beam tube : (")
electron-charge / mass ratio
(" )
: (")
electron-coupled oscillator
: (" )
: (")
electron-hole pair
(" )
: (")
electron-ray indicator tube, "magic eye" , " ": (")
electron-ray indicator tube, "magic eye" , " ": (")
electron-shell []
(" )
: (")
electron-volt
(" ) (" )
: (")
electronic
(" )
: (")
electronic contact rectifier
(" )
: (")
electronic rectifier
(" )
: (")
electronic tube rectifier : (")
electronics
(" )
: (")
electrostatic deflection
(" )
: (")
electrostatic focusing
(" )
: (")
electrostatic lens
(" )
: (")
electrostatic microscope, electrostatic electron microscope* , *
: , .
: (")
electrostatic microscope, electrostatic electron microscope* , *
: , .
: (")
eleventh-step contacts ": (")
eleventh-step springs ": (")
elliptically polarized : (")
elliptically polarized wave : (")
emergency call : (")
emergency installation : (")
emergency route : (")
emergency transmitter, reserve transmitter [ ]: (")
emergency transmitter, stand-by transmitter : (")
emission characteristic : (")
emission current : (")
emission efficiency : (")
emission, emission rate, : (")
emission, emission rate, : (")
emitter: (")
emphasizer: (")
empty band : (")
enamelled wire , : (")
enamelled wire , : (")
end effect [ ]: (")
end of pulsing signal : (")
end of selection signal : (")
end-fire array , : (")
end-fire array , : (")
end-to-end signalling : (")
energy band, Bloch band : (")
energy efficiency : (")
energy gap between two bands : (")
energy level of a particle [ ]: (")
energy-level diagram : (")
engaged test, busy test "": (")
equal length multi-unit code ,
: (" , " )
: (")
equal length multi-unit code ,
: (" , " )
: (")
equal ratio channels : (")
equalization: (")
equalizer: (")
equisignal : (")
equivalent circuit of a contact rectifier , : (")
equivalent circuit of a contact rectifier , : (")
equivalent diode , : (")
equivalent diode , : (")
equivalent diode voltage : (")
equivalent network , : (")
equivalent network , : (")
equivalent [adj.], [-]: (")
equivalent [adj.], [-]: (")
equivalent, overall loss, overall gain, net loss, [ ]: (")
equivalent, overall loss, overall gain, net loss, [ ]: (")
erasure signal : (")
erection of cable : (")
erlang [ ]: (")
error-correcting telegraph code
(" )
: (")
error-detecting telegraph code
(" )
: (")
ether: (")
exchange area : (")
exchange connection : (")
exchange fault, exchange trouble : (")
exchange, telephone exchange; central office [US]: (")
exchange-line call : (")
excitation, : (")
excitation, : (")
excitation anode, keep=alive electrode : (")
excitation band : (")
excitation energy : (")
excitation of gas , : (")
excitation of gas , : (")
excitation potential : (")
excitation state, excitation level , : (")
excitation state, excitation level , : (")
excited ion : (")
excited-atom density [ ]: (")
excitor: (")
excitron: (")
exclusive exchange line, direct exchange line , : (")
exclusive exchange line, direct exchange line , : (")
expander: (")
expansion [; ]: (")
expansion bolt, expansion anchor : (")
expansion orbit : (")
extended engaged condition "": (")
extension line : (")
extension, subscriber's extension station, : (")
extension, subscriber's extension station, : (")
external plant, outside plant, external installation, outside installation : (")
externally heated arc : (")
extinction potential : (")
extinction voltage : (")
extra [telegraph] []: (")
extraordinary wave : (")
extrinsic semi-conductor : (")
eye-ball indicator : (")
face-plate [ ]: (")
facsimile telegram
: (" , " )
: (")
facsimile, facsimile telegraphy ,
: (" , " )
: (")
facsimile, facsimile telegraphy ,
: (" , " )
: (")
fader: (")
fading; decay [of luminescence]: (")
failure, fade [deprecated] []: (")
false ring, wrong number call : (")
false termination : (")
far-end crosstalk , : (")
far-end crosstalk , : (")
Faraday dark space : (")
fault: (")
fault electrode current, surge electrode current
(" )
: (")
faulty selection : (")
fee digits : (")
feed, feeding: (")
feedback: (")
feeder house : (")
feeder, feeder line , ,
(" )
: (")
feeder, feeder line , ,
(" )
: (")
feeder, feeder line , ,
(" )
: (")
Fermi characteristic-energy level : (")
Fermi statistics : (")
Fermi-Dirac-Sommerfeld velocity-distribution law
: , .
: (")
fidelity [ ]: (")
field emission : (")
field strength, field intensity : (")
field-effect transistor, fieldistor, F.E.T. : (")
field-free emission current : (")
figure-shift signal : (")
figures case : (")
figures shift : (")
filament voltage, heater voltage : (")
filamentary transistor : (")
filled band : (")
filter: (")
filtering, filtration: (")
final selector, connector : (")
finder, line finder, finder switch: (")
finding, : (")
finding, : (")
firing potential, striking potential : (")
first group selector ': (")
first Townsend discharge : (")
first-party release, first-subscriber release , : (")
first-party release, first-subscriber release , : (")
fixed time call, F.T.C., appointment message , ": (")
fixed time call, F.T.C., appointment message , ": (")
flame-proof wire : (")
flash-over: (")
flashing of tubes : (")
flashing relay : (")
flashing signal : (")
flat phantom : (")
flat plier, flat-nosed pliers , : (")
flat plier, flat-nosed pliers , : (")
flat rate : (")
flat response : (")
flat top antenna : (")
flexible cord : (")
flicker effect : (")
flip-flop circuit : (")
floating battery : (")
floating charge : (")
floating grid : (")
floating-carrier modulation, controlled-carrier modulation : (")
fluorescence: (")
fluorescent: (")
flux linkage : (")
flux [substance] []: (")
flyback: (")
flying spot , : (")
flying spot , : (")
focus: (")
focusing: (")
focusing coil : (")
focusing electrode
(" )
: (")
focusing magnet : (")
folded top antenna : (")
forbidden band : (")
forced oscillation : (")
forced release : (")
fork tone modulation , : (")
fork tone modulation , : (")
form factor : (")
fortuitous distortion : (")
forward bias : (")
forward breakdown : (")
forward conductance : (")
forward current : (")
forward direction, easy-flow direction : (")
forward hold : (")
forward recall signal , : (")
forward recall signal , : (")
forward resistance : (")
forward signalling : (")
forward transfer resistance : (")
forward transfer signal : (")
forward voltage : (")
found O.K., F.O.K. , ": (")
found O.K., F.O.K. , ": (")
four-terminal network : (")
four-wire amplifier, four-wire repeater [deprecated] : (")
four-wire circuit : (")
four-wire type circuit : (")
frame: (")
free electron
(" )
: (")
free line signal, F.L.S., idle indicating signal "", "": (")
free line signal, F.L.S., idle indicating signal "", "": (")
free oscillation : (")
free space diagram, free space pattern : (")
frequency, : (")
frequency, : (")
frequency change [ ]: (")
frequency converter, frequency changer : (")
frequency deviation : (")
frequency discriminator : (")
frequency divider : (")
frequency doubler : (")
frequency modulation, F.M. , ": (")
frequency modulation, F.M. , ": (")
frequency multiplier : (")
frequency range, frequency band , : (")
frequency range, frequency band , : (")
frequency response : (")
frequency selective signalling, harmonic selective signalling : (")
frequency shift : (")
frequency shift keying, F.S.K. , ": (")
frequency shift keying, F.S.K. , ": (")
frequency shift signalling : (")
frequency standard, frequency standard oscillator : (")
frequency swing : (")
frequency tolerance : (")
frequency translation : (")
frequency tripler : (")
frequency-change signalling : (")
frequency-changer crystal : (")
frequency-division multiplex : (")
frequency-exchange signalling : (")
frequency-modulated cyclotron : (")
frequency-shift diplex operation, twinplex , : (")
frequency-shift diplex operation, twinplex , : (")
fringe effect : (")
front-to-back ratio [ ]: (")
frying: (")
full availability : (")
full satellite exchange : (")
full-availability group : (")
full-wave rectifier : (")
fully energized : (")
fully intermeshed network : (")
fundamental frequency : (")
fuse: (")
fuse mounting : (")
fuse panel : (")
gain
: (" )
: (")
gamma rays
: .
: (")
ganged capacitors : (")
gas amplification factor [ ]: (")
gas focusing : (")
gas-filled rectifier , : (")
gas-filled rectifier , : (")
gas-filled tube , : (")
gas-filled tube , : (")
gaseous: (")
gassy tube : (")
gate circuit : (")
gating: (")
Geiger counter, Geiger-Mueller counter, Geiger-Mueller tube , : (")
Geiger counter, Geiger-Mueller counter, Geiger-Mueller tube , : (")
Geissler tube : (")
generator, : (")
generator, : (")
generator signalling : (")
getter, : (")
getter, : (")
glow discharge : (")
gong: (")
grade of service : (")
graded rack : (")
grading group, group : (")
grading, progressive interconnection: (")
gramme molecule, mole , : (")
gramme molecule, mole , : (")
gramme-atom : (")
grating converter : (")
gravity switch : (")
grazing incidence : (")
grid: (")
grid bias : (")
grid cut-off voltage : (")
grid leak : (")
grid number n n: (")
grid pitch : (")
grid-driving power : (")
grid-leak resistance : (")
groove of insulator : (")
ground wave : (")
ground, earth: (")
group centre : (")
group delay, envelope delay , : (")
group delay, envelope delay , : (")
group distribution frame, G.D.F. , ": (")
group distribution frame, G.D.F. , ": (")
group selector : (")
group selector satellite exchange : (")
group translating equipment : (")
group velocity [ ]: (")
group-occupancy meter : (")
group-occupancy-time meter : (")
guard band : (")
guard circuit : (")
guard circuit coefficient : (")
guard relay : (")
guide pin : (")
guide pulley : (")
H-network ", H: (")
H-network ", H: (")
H-pole, H-fixtures ", H: (")
H-pole, H-fixtures ", H: (")
halation [ ]: (")
half-duplex operation : (")
half-tone : (")
half-wave rectifier : (")
hammer, bell clapper: (")
handset, microtelephone, hand microtelephone, H.M.T. , : (")
handset, microtelephone, hand microtelephone, H.M.T. , : (")
hangover time [ ]: (")
harmonic distortion : (")
harmonic frequency : (")
head band : (")
head of the queue : (")
head receiver, headgear receiver, headphone : (")
heat coil, thermal coil , : (")
heat coil, thermal coil , : (")
heat shield [ ]: (")
heater: (")
heater current : (")
heating: (")
helix, scroll [deprecated]: (")
Hell receiver, Hell printer
: (" )
: (")
Hell sender : (")
Hell system, Hellschreiber system : (")
heptode: (")
heterodyne reception : (")
heterodyning: (")
hexode: (")
high frequency, H.F. , ": (")
high frequency, H.F. , ": (")
high inverse-voltage rectifier , : (")
high inverse-voltage rectifier , : (")
high-field-emission arc , : (")
high-field-emission arc , : (")
high-frequency repeater distribution frame, H.F.R.D.F. , " ": (")
high-frequency repeater distribution frame, H.F.R.D.F. , " ": (")
high-pass filter , : (")
high-pass filter , : (")
high-speed relay : (")
hodoscope: (")
hold control: (")
hold current : (")
holding key : (")
holding relay : (")
holding time : (")
holding winding : (")
holding-time distribution : (")
hole conduction : (")
hole, electron hole: (")
homing beacon : (")
homing, return to normal, [ ]: (")
homing, return to normal, [ ]: (")
hop [ ]: (")
horizontal double-J insulator spindle " : (")
horizontally polarized : (")
horizontally polarized wave : (")
horn loudspeaker : (")
host, host crystal, base, base material, bulk material, matrix,
: .
: (")
host, host crystal, base, base material, bulk material, matrix,
: .
: (")
hot cathode : (")
hot wire instrument : (")
house exchange system , : (")
house exchange system , : (")
house pole, roof pole, roof standard : (")
house telephone system : (")
howl: (")
howler: (")
hum, humming: (")
hunter: (")
hunting: (")
hybrid coil, hybrid transformer : (")
hypothetical exchange
(" )
: (")
hysteresis: (")
hysteresis factor : (")
ideal rectifier : (")
ideal transducer : (")
idle period , : (")
idle period , : (")
ignition interference, ignition noise : (")
ignitor [ ]: (")
ignitron: (")
image antenna : (")
image attenuation coefficient : (")
image impedances : (")
image parameter filter : (")
image phase-change coefficient : (")
image transfer coefficient, image transfer constant : (")
image-converter tube : (")
immediate action, quick operation , : (")
immediate action, quick operation , : (")
immediate ringing : (")
impedance: (")
impedance simulating network, balancing network : (")
impedor: (")
impulsive noise : (")
impurity [-]: (")
impurity activation energy
: .
: (")
in series, : (")
in series, : (")
in-phase component : (")
incoming call : (")
incoming circuit : (")
incoming junction, I/C junction; incoming trunk [US]"
: " (" )
: (")
incremental duplex , : (")
incremental duplex , : (")
incremental inductance : (")
independent sideband transmission , : (")
independent sideband transmission , : (")
index of co-operation : (")
indicator: (")
indirectly heated cathode : (")
individual distortion : (")
individual trunk" , " : (")
individual trunk" , " : (")
induced noise : (")
inductance: (")
induction: (")
induction coil : (")
inductive: (")
inductive winding : (")
inductor: (")
ineffective call, uncompleted call, lost call : (")
information theory : (")
inhibition circuit : (")
initial inverse voltage : (")
initial pick=up : (")
initiating electron
(" )
: (")
injection [ ]: (")
inlet, : (")
inlet, : (")
inner work function : (")
inner-shell electron
(" )
: (")
input capacitance : (")
input circuit [ ]: (")
input electrode
(" )
: (")
input power : (")
input voltage : (")
inquiry position : (")
insertion attenuation : (")
insertion gain : (")
insertion loss : (")
insertion parameter filter : (")
insertion phase change : (")
insertion transfer function
(" , " )
: (")
inspector, supervisor; : (")
inspector, supervisor; : (")
installation [, ' ]: (")
instantaneous companding : (")
instantaneous frequency : (")
instantaneous value : (")
insulated, isolated: (")
insulation test : (")
insulation, isolation: (")
insulator [, ]: (")
insulator spindle, insulator bracket, insulator pin, : (")
insulator spindle, insulator bracket, insulator pin, : (")
integration circuit, integrator : (")
intelligence signal : (")
intelligibility: (")
intensifier electrode, post-deflection accelerating electrode ,
(" )
: (")
intensifier electrode, post-deflection accelerating electrode ,
(" )
: (")
intensity: (")
intensity of traffic carried : (")
intensity of traffic lost : (")
intensity of traffic offered : (")
inter-digital pause, inter-train pause : (")
inter-switchboard line, tie line : (")
interception [ ]: (")
interception circuit : (")
intercommunication : (")
intercommunication switch : (")
interconnecting [ ]: (")
interdialling : (")
interference locator : (")
interference pattern : (")
interference, disturbance: (")
interlock: (")
intermediate amplifier, intermediate repeater : (")
intermediate distribution frame, I.D.F. , ": (")
intermediate distribution frame, I.D.F. , ": (")
intermediate exchange; intermediate toll center, I.T.C. [US] : (")
intermediate frequency , ": (")
intermediate frequency , ": (")
intermittent fault , ": (")
intermittent fault , ": (")
intermodulation : (")
intermodulation distortion , : (")
intermodulation distortion , : (")
intermodulation noise : (")
internal congestion : (")
internal plant, inside plant, internal installation, inside installation : (")
international terminal exchange : (")
interrupted continuous wave : (")
interrupted ringing : (")
interrupter: (")
interrupter contacts : (")
interruption cable, emergency cable : (")
interruption key, cut-off key : (")
interstage coupling, intervalve coupling : (")
interstage transformer : (")
interstitial: (")
intrinsic: (")
intrinsic semi-conductor : (")
intrusion: (")
intrusion tone : (")
inverse current : (")
inverse electrode current
(" ). : .
: (")
inverse impedances
: .
: (")
inverse peak voltage : (")
inverse photo-electric effect
: .
: (")
inverse voltage : (")
inversion: (")
inverter: (")
ion: (")
ion avalanche : (")
ion beam : (")
ion burning : (")
ion density : (")
ion flow : (")
ion gun : (")
ion sheath : (")
ion trajectory : (")
ion trap : (")
ionic conduction : (")
ionic semi-conductor : (")
ionic-heated cathode : (")
ionization: (")
ionization current : (")
ionization energy : (")
ionization gauge : (")
ionization potential : (")
ionization rate , : (")
ionization rate , : (")
ionization time , : (")
ionization time , : (")
ionosphere: (")
iron-wire core : (")
iron-wire core coil , : (")
iron-wire core coil , : (")
island effect []: (")
isochronous modulation : (")
isotopes: (")
isthmus armature : (")
iterative impedance : (")
jack: (")
jack panel : (")
jack strip : (")
jamming: (")
jitter: (")
joint access : (")
joint trunk exchange : (")
joint, splice: (")
jointing of cables : (")
judder []: (")
jumper, jumper wire, distributing frame wire : (")
junction [-]: (")
junction cable, toll cable, trunk cable [' "]: (")
junction circuit [between local exchanges], toll circuit [between local exchange and centre], trunk circuit [between centres]; toll circuit [US], interoffice trunk [US]", ; " , " , " , " ['], " , " , " [']
: " (" )
: (")
junction circuit [between local exchanges], toll circuit [between local exchange and centre], trunk circuit [between centres]; toll circuit [US], interoffice trunk [US]", ; " , " , " , " ['], " , " , " [']
: " (" )
: (")
junction circuit [between local exchanges], toll circuit [between local exchange and centre], trunk circuit [between centres]; toll circuit [US], interoffice trunk [US]", ; " , " , " , " ['], " , " , " [']
: " (" )
: (")
junction circuit [between local exchanges], toll circuit [between local exchange and centre], trunk circuit [between centres]; toll circuit [US], interoffice trunk [US]", ; " , " , " , " ['], " , " , " [']
: " (" )
: (")
junction circuit [between local exchanges], toll circuit [between local exchange and centre], trunk circuit [between centres]; toll circuit [US], interoffice trunk [US]", ; " , " , " , " ['], " , " , " [']
: " (" )
: (")
junction circuit [between local exchanges], toll circuit [between local exchange and centre], trunk circuit [between centres]; toll circuit [US], interoffice trunk [US]", ; " , " , " , " ['], " , " , " [']
: " (" )
: (")
junction circuit [between local exchanges], toll circuit [between local exchange and centre], trunk circuit [between centres]; toll circuit [US], interoffice trunk [US]", ; " , " , " , " ['], " , " , " [']
: " (" )
: (")
junction circuit [between local exchanges], toll circuit [between local exchange and centre], trunk circuit [between centres]; toll circuit [US], interoffice trunk [US]", ; " , " , " , " ['], " , " , " [']
: " (" )
: (")
junction circuit [between local exchanges], toll circuit [between local exchange and centre], trunk circuit [between centres]; toll circuit [US], interoffice trunk [US]", ; " , " , " , " ['], " , " , " [']
: " (" )
: (")
junction diode : (")
key sender, sender , : (")
key sender, sender , : (")
key set [ - ']: (")
key [of keyboard] [ ]: (")
keyboard, []: (")
keyboard, []: (")
keyboard perforator : (")
keyboard transmitter : (")
keying: (")
keyless ringing : (")
keysending A-position ' : (")
keysending B-position ' : (")
keyshelf : (")
kilohertz, kHz, kilocycles per second, kc/s, "
: (" )
: (")
kilohertz, kHz, kilocycles per second, kc/s, "
: (" )
: (")
kilovolt, kV : (")
kilowatt, kW , ": (")
kilowatt, kW , ": (")
kinetic energy [ ]: (")
kink: (")
klystron: (")
knife-edge relay : (")
knob: (")
L-network ", L: (")
L-network ", L: (")
label: (")
lacing board, forming board : (")
ladder attenuator : (")
laminated core : (")
lamp cap : (")
lamp signal : (")
lamp, bulb: (")
land station : (")
last-party release, last-subscriber release , : (")
last-party release, last-subscriber release , : (")
latching relay : (")
late-choice call meter : (")
latent electronic image
: (" )
: (")
lateral stay : (")
laying of cable : (")
lead sheath : (")
lead-covered cable , : (")
lead-covered cable , : (")
lead-in insulator, leading in insulator : (")
lead-in, lead-in wire, telephone drop, drop wire : (")
leading current : (")
leading-in cable : (")
leakage, : (")
leakage, : (")
leakage current : (")
leakance: (")
left-hand twist, left-hand lay : (")
Leitungswaehler mit Durchwahl [German] , ": (")
Leitungswaehler mit Durchwahl [German] , ": (")
letter-shift signal : (")
letters case : (")
letters shift : (")
level [ ]: (")
level measuring set, L.M.S. , ": (")
level measuring set, L.M.S. , ": (")
level multiple : (")
level recorder : (")
level springs : (")
lie detector : (")
lifetime [ , ]: (")
light-sensitive : (")
lightning protector, lightning arrestor, , : (")
lightning protector, lightning arrestor, , : (")
lightning protector, lightning arrestor, , : (")
limit of audibility : (")
limited availability : (")
limited-availability group : (")
limiter: (")
line amplifier
(" )
: (")
line bank , : (")
line bank , : (")
line constant
(" )
: (")
line feed : (")
line found O.K. : (")
line relay
(" )
: (")
line residual equalizer , : (")
line residual equalizer , : (")
line simulator, artificial line , : (")
line simulator, artificial line , : (")
line temperature-compensating equalizer , : (")
line temperature-compensating equalizer , : (")
line wiper, line brush : (")
line, line circuit [' ]
(" )
: (")
linear amplifier : (")
linear detection , : (")
linear detection , : (")
linear electron accelerator ,
(" )
: (")
linear electron accelerator ,
(" )
: (")
linear network : (")
lineman: (")
link: (")
link-by-link signalling : (")
linked numbering scheme : (")
listener: (")
listening: (")
listening-in: (")
listening-in circuit : (")
listening-in jack : (")
litzendraht, litz: (")
live, alive [ ]: (")
load current : (")
load line : (")
load point : (")
loading: (")
loading coil : (")
loading-coil section : (")
loading-coil unit : (")
lobe: (")
local battery telephone set, L.B. telephone set , ": (")
local battery telephone set, L.B. telephone set , ": (")
local battery, L.B. , ": (")
local battery, L.B. , ": (")
local call : (")
local exchange, local main exchange; local central office [US] : (")
local record []: (")
local sensitivity : (")
location of a fault : (")
locking key : (")
loctal base : (")
logatom: (")
logatom articulation : (")
lone electron
(" )
: (")
long duration call, L.D.C. , ": (")
long duration call, L.D.C. , ": (")
long wave : (")
long-distance call : (")
long-distance dialling : (")
longitudinal stay, head guy : (")
loop: (")
loop antenna, frame antenna , : (")
loop antenna, frame antenna , : (")
loop disconnect pulsing, loop dialling : (")
loop test : (")
loop-battery pulsing : (")
loose, : (")
loose, : (")
loose connection : (")
loose contact : (")
loose coupling : (")
loss: (")
loudness : (")
loudspeaker, speaker: (")
low frequency, L.F. , ": (")
low frequency, L.F. , ": (")
low insulation, poor isolation : (")
low-pass filter , : (")
low-pass filter , : (")
lower sideband : (")
lowest usable frequency, L.U.F. , ": (")
lowest usable frequency, L.U.F. , ": (")
lug of insulator : (")
luminescence: (")
luminescent centre : (")
luminescent screen [ ]: (")
luminescent screen tube : (")
luminosity: (")
luminous efficiency : (")
luminous sensitivity [ ]: (")
luminous sensitivity at a colour temperature of 2854 K [ - 2854 ]
.
: (")
lumped capacitance : (")
m-derived L-section filter L m: (")
machine ringing : (")
magnet: (")
magnetic deflection : (")
magnetic focusing : (")
magnetic microscope, magnetic electron microscope* , *
: , .
: (")
magnetic microscope, magnetic electron microscope* , *
: , .
: (")
magnetic residual loss : (")
magnetic screen : (")
magnetic spectrograph : (")
magnetically biased polarized relay : (")
magnetization: (")
magneto bell : (")
magneto exchange; magneto central office [US] : (")
magneto generator, magneto electric generator : (")
magneto system : (")
magneto telephone set : (")
magnetomotive force, m.m.f. , "
(" )
: (")
magnetomotive force, m.m.f. , "
(" )
: (")
magnetron: (")
main anode : (")
main cable : (")
main distribution frame, M.D.F. , ": (")
main distribution frame, M.D.F. , ": (")
main exchange, main office, master office : (")
main gap : (")
main quantum number, first quantum number : (")
mains , : (")
mains , : (")
maintenance: (")
majority carrier : (")
make contact : (")
make pulse, make impulse : (")
make-and-break contact : (")
make-before-break contact unit , : (")
make-before-break contact unit , : (")
make-contact unit : (")
malicious call : (")
man-made noise : (")
manager-and-secretary station : (")
manhole, : (")
manhole, : (")
manhole opening : (")
manual exchange; manual central office [US] : (")
manual hold
: ( ).
: (")
manual ringing : (")
manual switching system : (")
manual switchroom, operating room , : (")
manual switchroom, operating room , : (")
manual system : (")
manual tape relay, torn tape relay , : (")
manual tape relay, torn tape relay , : (")
manual telephone system : (")
manual tuning : (")
margin [ ]: (")
maritime mobile service : (")
mark []: (")
marker []: (")
marker [ ]: (")
marker beacon : (")
marker system [ ]: (")
marking: (")
marking percentage : (")
marline tie : (")
mass number : (")
mass of the electron
(" )
: (")
mass spectrograph : (")
mass-action law : (")
mast: (")
master oscillator : (")
master telephone transmission reference system : (")
master-clock : (")
matched transformers, matched repeating coils : (")
matching: (")
matching network : (")
maximum usable frequency, M.U.F. , ": (")
maximum usable frequency, M.U.F. , ": (")
Maxwell-Boltzmann statistics : (")
Maxwell-Boltzmann velocity-distribution law
: .
: (")
mean free path [ ]: (")
measuring instrument, -meter [' -...]: (")
medium frequency, M.F. , ": (")
medium frequency, M.F. , ": (")
megahertz, mHz, megacycle per second, mc/s
: . : MHz.
: (")
megger, megohmmeter, : (")
megger, megohmmeter, : (")
mercury-pool cathode : (")
mercury-vapour rectifier, mercury-arc rectifier , : (")
mercury-vapour rectifier, mercury-arc rectifier , : (")
mesh: (")
meson: (")
metal rectifier , : (")
metal rectifier , : (")
metallic circuit , : (")
metallic circuit , : (")
metallized screen [ ]: (")
metastable state, metastable level , : (")
metastable state, metastable level , : (")
meter key, register key : (")
meter lamp, register pilot lamp : (")
meter pulse : (")
meter reading, register reading : (")
meter wire, M-wire : (")
meter, register: (")
metering digit : (")
metering, registration, registering: (")
mica: (")
microphone noise, transmitter noise : (")
microphone, transmitter, telephone transmitter: (")
microphony, microphonic effect, microphonism: (")
microwave : (")
minimum-phase frequency characteristic : (")
minimum-phase network : (")
minor exchange : (")
minority carrier : (")
misfire : (")
mismatch : (")
misrouting : (")
mistune : (")
mixed semi-conductor : (")
mixer: (")
mixing: (")
mobile equipment : (")
mobility [ ]: (")
mode, mode of oscillation [etc.], [']: (")
mode, mode of oscillation [etc.], [']: (")
modulated continuous wave : (")
modulated wave : (")
modulating wave : (")
modulation: (")
modulation element
(" , " , " , " )
: (")
modulation factor : (")
modulation index : (")
modulator: (")
modulator electrode
(" )
: (")
molecular weight ,
: .
: (")
molecular weight ,
: .
: (")
molecule,
: .
: (")
molecule,
: .
: (")
monitor; : (")
monitor []: (")
monitor; : (")
monitoring: (")
monitoring key : (")
monoscope*: (")
Morse code
: .
: (")
Morse dash ,
: .
: (")
Morse dash ,
: .
: (")
Morse key
: .
: (")
Morse printer
: .
: (")
Morse space
: .
: (")
Morse telegraphy
: .
: (")
mosaic telegraphy : (")
motor: (")
motor uniselector : (")
motor-boating, rumble: (")
motor-generator , : (")
motor-generator , : (")
motorized keyboard : (")
moulded capacitor : (")
mounting, erecting, construction assembly, construction in progress: (")
mouthpiece: (")
moving coil : (")
multi-channel telegraph system ,
(" )
: (")
multi-channel telegraph system ,
(" )
: (")
multi-component signal : (")
multi-electrode tube
(" )
: (")
multi-exchange area : (")
multi-fee metering : (")
multi-segment magnetron : (")
multiband antenna : (")
multimeter : (")
multipath effect : (")
multiple: (")
multiple answering equipment : (")
multiple field : (")
multiple image, double image, ghost image, : (")
multiple image, double image, ghost image, : (")
multiple ionization : (")
multiple jack : (")
multiple marking : (")
multiple modulation : (")