voice-call mode

- acoustic mode
- active mode
- adaptive mode
- alternate mode
- ANS/FAX mode
- answering mode
- assemble mode
- asymmetrical mode
- asynchronous balanced mode
- asynchronous transfer mode
- authorized reception mode
- auto document mode
- autoinformer mode
- automatic mode
- automatic reception mode
- auto-night mode
- backup mode
- basic control mode
- biharmonical mode
- bound mode
- buffer mode
- byte mode
- center mark mode
- channel mode
- circuit-transfer mode
- cladding mode
- client-server mode
- coasting mode
- combined mode
- command mode
- common mode
- communication mode
- confidential mode
- continuous emission mode
- continuous mode
- conversational mode
- correction mode
- coupled modes
- cutoff mode
- data mode
- data-processing mode
- day/night mode
- delayed ARM mode
- DEMO mode
- detail mode
- detection mode
- direct sending mode
- display mode
- dual mode
- duplex mode
- erase mode
- evanescent mode
- executive mode
- expansion modes
- external synchronization mode
- Fax mode
- fine mode
- first-type oscillation mode
- forced mode
- frame mode
- fundamental mode
- generator mode
- ghost mode
- group mode
- guard mode
- half-duplex mode
- half-speed mode
- half-tone mode
- hierarchical mode
- high-power mode
- holding mode
- hollow-beam mode
- home-only mode
- hybrid mode
- idling mode
- instant ARM mode
- internal synchronization mode
- interrupt mode
- interruptible current mode
- inversed mode
- key mode
- landscape mode
- leaky mode
- light-tensioned mode
- limiting mode
- linear mode
- line-art mode
- line-hold mode
- line-holding mode
- listening mode
- local mode
- lock mode
- long-distance mode
- long-play mode
- long-time mode
- loudly mode
- low signal mode
- lugdown mode
- macroblock mode
- magnetostatic mode
- manual mode
- master mode
- matched operation mode
- matching mode
- memory lock mode
- minimal mode
- mode of behavior
- modulated mode
- monitor mode
- mono mode
- multicopy mode
- multiplex mode
- multipoint mode
- multisort document reception mode
- net mode
- nonpublic mode
- nontransparent mode
- normal mode
- off mode
- off-normal mode
- on-line mode
- on-link mode
- open-phase mode
- operating mode
- orthonormal modes
- overseas mode
- overtensioned mode
- parallel mode
- part load mode
- partial load mode
- peak mode
- periodic mode
- phone-only mode
- photo mode
- photodiode mode
- photogalvanic mode
- phototransistor mode
- pilot mode
- playback mode
- polling reception mode
- polling standby mode
- polling-transmission mode
- portrait mode
- potential mode
- precritical mode
- prediction mode
- printer mode
- private mode
- propagation mode
- pulsed mode
- quasi-cyclic mode
- quasi-key mode
- quick-record mode
- radiation mode
- rated power mode
- real-time mode
- receive mode
- recursive short-time mode
- redial mode
- remote-receiving mode
- rental mode
- rest mode
- reversing mode
- running-wave mode
- sample-and-hold mode
- saturation mode
- save dial mode
- scan mode
- second-type oscillation mode
- self-exciting oscillation mode
- self-oscillating mode
- send later mode
- sequential lossless mode
- serial mode
- series mode
- servicing mode
- setup mode
- shared fax mode
- short-time mode
- silence detection mode
- silently mode
- sleep mode
- soft self-exciting mode
- soft-control mode
- soft-controlling mode
- sound mode
- special scanning mode
- standard mode
- standby mode
- standing wave mode
- start mode
- starting mode
- start-stop mode
- stereo mode
- stop mode
- storage mode
- substitute reception mode
- superfine mode
- switching mode
- symmetrical mode
- synchronous-transfer mode
- synchronous-transmission mode
- TEL mode
- TEL/FAX mode
- telegraph mode
- telephone mode
- tensioned mode
- transfer mode
- transmission dead-line mode
- transmission mode
- transverse electric-and-magnetic mode
- transverse magnetic mode
- transverse-electric mode
- traveling wave mode
- triggering mode
- tuning mode
- uncoupled modes
- undertensioned mode
- unlock mode
- unstable mode
- valve mode
- vibrating mode
- voice-call mode
- waiting mode
- winding mode
- wireless-access mode
- XX mode

- access-barred signal
- accompanying-sound signal
- acoustic signal
- active line duration signal
- actuating signal
- address-complete signal
- address-incomplete signal
- alarm indication signal
- alarm signal
- alternating mark-inversion signal
- amplitude-modulated signal
- analog electric signal
- analog signal
- ancillary signal
- anisochronous signals
- answer signal
- aperiodic signal
- arrival signal
- audible signal
- authentication signal
- B signal
- background signal
- backward signal
- band-limited signal
- bell signal
- bidirectional signal
- binary signal
- bipolar signal
- black signal
- black-burst signal
- blanketing signal
- blocking acknowledgement signal
- blocking signal
- blue signal
- broadband coding signal
- busy signal
- buzzer signal
- B-Y signal
- call signal
- call-accepted signal
- call-acknowledgement signal
- callback ring signal
- call-confirmation signal
- call-control signal
- called number signals
- called-terminal answered signal
- called-terminal engaged signal
- call-failure signal
- calling indicator signal
- calling signal
- call-not-accepted signal
- call-progress signal
- call-request signal
- call-sending check signal
- camera signal
- carrier chrominance signal
- carrier color signal
- carrier sense signal
- carrier signal
- case-shift signal
- caution signal
- cellular signal
- channel-identification signal
- chirp signal
- chroma signal
- chrominance signal
- chrominance video signal
- circuit group congestion signal
- clear-back signal
- clear-confirmation signal
- clear-forward signal
- clearing signal
- clock signal
- code signal
- color bar signal
- color identification signals
- color signal
- color-difference signal
- color-picture signal
- color-separated signal
- color-sync signal
- common emergency signal
- common-mode signal
- compelled signal
- complete-address signal
- complex TV-signal
- component-coded digital video signal
- composite color sync signal
- composite video signal signal
- compressed-video signal
- conference communication signal
- confirmation-to-receive signal
- confusion signal
- connection-in-progress signal
- continuous time signal
- control track signal
- convergence signal
- cosine signal
- counterphase signal
- crosstalk signal
- cue signal
- danger signal
- data signal
- data-transfer request signal
- dc signal
- DCE clear signal
- DCE waiting signal
- desk-spot signal
- detected signal
- detection signal
- differential signal
- digital component video signal
- digital signal
- directivity signal
- disable signal
- discernible signal
- disconnect signal
- discrete-time signal
- dither signal
- doubleside signal
- driving signal
- DTE-clear signal
- duress signal
- electric signal
- electrooptic signal
- emergency signal
- enable signal
- enciphered signal
- encoded signal
- end-of-copy signal
- end-of-impulsing signal
- end-of-pulsing signal
- end-of-selection signal
- engaged signal
- error signal
- excitation signal
- exponential signal
- facsimile signal
- false signal
- fate signal
- fault signal
- feedback signal
- field sawtooth signal
- field synchronization signal
- figures-shift signal
- finite signal
- first-buzzer signal
- floating signal
- foreground signal
- forward recall signal
- four-aspect signal
- frame sync signal
- frame-alignment signal
- framing signal
- free-line signal
- full-frame test signal
- functional signal
- gate signal
- Gaussian signal
- green signal
- group signal
- G-Y signal
- hang-up signal
- HF signal
- homochronous signal
- horizontal sync signal
- hydroacoustic signals
- idle indication signal
- in-band signal
- information signal
- inhibiting signal
- injection signal
- in-phase signal
- input signal
- interfering signal
- intermediate-frequency signal
- international-code signal
- interoffice signals
- interrupt signal
- inversion signal
- isochronous signals
- jam signal
- left signal
- left-backward signal
- left-forward signal
- line sawtooth signal
- line synchronization signal
- linear signal
- line-drop signal
- line-out-of-service signal
- load-off signal
- local signal
- locking signal
- loop-down signal
- loop-error signal
- loop-up signal
- low-frequency signal
- luminance staircase signal
- M signal
- marking signal
- MAYDAY signal
- mesochronous signal
- microwave signal
- minimum descernible signal
- minimum detectable signal
- modulated signal
- modulating signal
- monitor signal
- monitoring signal
- monochromatic signal
- monophonic signal
- multichannel telephony signal
- multipage signal
- multiplexed signal
- multitone test signal
- music melody signal
- narrowband return signal
- n-level output signal
- noise-free signal
- noise-shaped signal
- noncompelled signal
- noncomposite color picture signal
- note-off signal
- note-on signal
- n-position signal
- number received signal
- offering signal
- off-hook signal
- on-hook signal
- optical signal
- optimal amplitude signal
- orthogonal signal
- out-of-band signal
- output signal
- PAN-signal
- periodic signal
- permanent signal
- phantom signal
- phasing signal
- pickup signal
- picture signal
- picture-phone signal
- picture-shading signal
- pilot signal
- playback signal
- plesiochronous signal
- polar signal
- polling signal
- power signal
- pre-video signal
- primary signal
- probing signal
- proceed-to-select signal
- proceed-to-transmit signal
- program signal
- protection signal
- pseudonoise signal
- pulse control signal
- pulse signal
- pulsed signal
- Q-signal
- quadrature-phase subcarrier signal
- quantized signal
- quasi-harmonic signal
- radio-frequency signal
- radioimpulse signal
- radio-time signals
- reading signal
- ready-for-data signal
- ready-to-receive signal
- recall signal
- receiving acknowledgement signal
- rectangular signal
- RED signal
- red signal
- RED/BLACK signal
- redundant signal
- reference signal
- regenerated signal
- regular signal
- reorder signal
- request signal
- request-for-repetition signal
- re-reflected signal
- rering signal
- reset signal
- residual signal
- retransmitted signal
- return signal
- returned signal
- rewrite signal
- rewriting signal
- right signal
- right-backward signal
- right-forward signal
- ringing signal
- ring-off signal
- round-the-world signal
- runout signal
- safety signal
- sampled signal
- saturation signal
- saw-toothed signal
- second buzzer signal
- secondary signal
- security signal
- seizing signal
- sending acknowledgement signal
- sensed signal
- service signal
- shading compensation signal
- shading signal
- silhouette signal
- simplest sync signal
- sin signal
- single-ended signal
- single-sideband signal
- smear signal
- SOS-signal
- sound signal
- space signal
- speech signal
- spurious signal
- start dialing signal
- start signal
- start-record signal
- start-stop signal
- station answer signal
- stereophonic signal
- stop signal
- stop-record signal
- stuffed signal
- supersync signal
- supervisory signal
- suppressed sideband signal
- switch signal
- switchover signal
- synchronous signal
- synphase signal
- system busy signal
- teledata signal
- telegraph-control signal
- telephone-control signal
- ternary signal
- testing signal
- test-line signal
- test-pattern signal
- threshold signal
- ticker signal
- time signals
- timing reference signal
- total television signal
- transmission confirming signal
- triangular signal
- triggering signal
- tristimulus signal
- TV-control signal
- TV-transmission signal
- undesired signal
- unstuffed signal
- unvoiced signal
- urgent signal
- vertical synchronization signal
- vestigial sideband signal
- videoimpulse signal
- visual message signal
- voice analog signal
- voice answer signal
- wanted signal
- warning signal
- weighted signal
- white signal
- write signal
- writing signal
- Y-signal

- acknowledgement signal
- active line duration signal
- actuating signal
- alarm signal
- alarm indication signals
- alias signal
- all-sky signal
- alternation mark inversion signal
- altitude signal
- AMI signal
- amplitude-modulated signal
- analog signal
- analog/mixed signal
- anisochronous digital signal
- antipodal signal
- ATF signal
- audio signal
- aural signal
- autoalarm signal
- automatic track finding signal
- B-signal
- band-limited signal
- bandpass signal
- baseband signal
- beam signal
- bidirectional signal
- binary signal
- bioelectric signal
- bipolar signal
- black signal
- black peak signal
- blanked picture signal
- blanking signal
- blocking signal
- blue signal
- broadband signal
- burst signal
- busy signal
- busy back signal
- busy-flash signal
- B-Y signal
- call signal
- call progress signal
- call-confirmation signal
- call-control signal
- called-number signals
- camera signal
- carrier chrominance signal
- carrier color signal
- carrier detect signal
- carry signal
- carry clear signal
- carry complete signal
- carry initiating signal
- case-shift signal
- CD signal
- challenging signal
- channel identification signal
- chirp signal
- chroma signal
- chrominance signal
- circuit available signal
- clear signal
- clear back signal
- clear forward signal
- clearing signal
- clipped signal
- clock signal
- coded signal
- coherent signal
- color signal
- color-bar signal
- color-burst signal
- color-difference signal
- color identification signal
- color-picture signal
- color-sync signal
- color-television signal
- color video signal
- command destruct signal
- common-mode signal
- comparison signal
- compelled signal
- compensation signal
- complex analytical signal
- component signal
- component color signal
- component video signal
- composite signal
- composite color signal
- composite-one-line signal
- composite picture signal
- composite video signal
- compressed signal
- confusion signal
- contaminating signal
- control signal
- convergence signal
- convolved signals
- course-fine encoded video signal
- dark-spot signal
- data signal
- DC signal
- decoded signal
- dehopped signal
- desired signal
- despread signal
- detectable signal
- deterministic signal
- difference signal
- differential-mode signal
- digital signal
- digital signal of level 0
- digital signal of level 1
- digital signal of level 1C
- digital signal of level 2
- digital signal of level 3
- digital signal of level 4
- direct-sequence signal
- direct-sequence spread-spectrum signal
- discernible signal
- disconnect signal
- disk changed signal
- distinguishable signal
- distress signal
- Doppler-invariant signal
- Doppler-shifted signal
- double-sideband signal
- downstream signal
- driving signal
- duobinary signal
- echo signal
- electric signal
- element difference signal
- emergency signal
- enabling signal
- enciphered signal
- end-of-block signal
- end-of-copy signal
- end-of-data signal
- end-of-impulsing signal
- end-of-message signal
- end-of-pulsing signal
- end-of-selection signal
- engaged signal
- erasure signal
- error signal
- excitatory signal
- facsimile signal
- facsimile framing signal
- facsimile phasing signal
- false signal
- fault signal
- feedback control signal
- field sawtooth signal
- figures-shift signal
- fluctuating signal
- flyback signal
- forward recall signal
- frame-alignment signal
- frame difference signal
- frame sync signal
- framing signal
- free-line signal
- frequency-hopped signal
- frequency-modulated signal
- frequency-shift signal
- full bandwidth signal
- FS signal
- G-signal
- gating signal
- Gaussian signal
- ghost signal
- global signal
- green signal
- guidance signal
- G-Y signal
- hang-up signal
- heterochronous digital signals
- high-frequency signal
- high-level signal
- homing signal
- homochronous digital signals
- horizontal sync signal
- I-signal
- IBG signal
- identification signal
- idle indication signal
- IF signal
- IFF target signal
- impulse signal
- incoming signal
- inhibiting signal
- inhibitory signal
- injected signal
- in-phase signal
- input signal
- insertion test signal
- intelligence signal
- inter-block gap signal
- interfering signal
- interfield test signal
- intermediate frequency signal
- international code signal
- interrogation signal
- interrupt signal
- inversion signal
- isochronous digital signal
- jamming signal
- L-signal
- large signal
- laser signal
- LB signal
- left signal
- left-backward signal
- left-forward signal
- LF signal
- limited signal
- linear FM signal
- line identification signal
- line sawtooth signal
- line sync signal
- locking signal
- logic signal
- loop actuating signal
- loop difference signal
- loop error signal
- loop feedback signal
- loop input signal
- loop return signal
- loop output signal
- low-frequency signal
- low-level signal
- low-level radio-frequency signal
- luminance signal
- M-signal
- mark signal
- marking signal
- masking signal
- mesochronous digital signals
- message signal
- message-bearing signal
- microwave signal
- MIDI signal
- minimum detectable signal
- minimum discernible signal
- mixed signal
- modulating signal
- monochrome signal
- monophonic signal
- multimode signal
- multiplexed signal
- myoelectric signal
- N-signal
- narrow-band signal
- naught signal
- negative-going signal
- neuroelectric signal
- noise signal
- noise-free signal
- noise-like signal
- noisy signal
- nominal detectable signal
- noncompelled signal
- noncomposite signal
- number received signal
- offering signal
- off-hook signal
- omnibearing signal
- on-course signal
- on-hook signal
- optical signal
- outcoming signal
- output signal
- P-signal
- packetized signal
- partial-response signal
- PCM signal
- permanent signal
- phantom signal
- phase-modulated signal
- phase-shift signal
- phase-shift keyed signal
- phasing signal
- photoelectric signal
- pickup signal
- picture signal
- picture-phone signal
- picture-shading signal
- pilot signal
- playback signal
- plesiochronous digital signals
- polar signal
- positive-going signal
- print contrast signal
- probing signal
- program signal
- protected signal
- pseudonoise signal
- pseudorandom signal
- pseudo-ternary signal
- pulsar signal
- pulse-code modulation signal
- pulsed signal
- Q-signal
- quadrature-phase subcarrier signal
- quantized signal
- R-signal
- radio signal
- radio-frequency signal
- radio star signal
- radiotelephone distress signal
- random signal
- RB signal
- read signal
- reading signal
- ready-to-receive signal
- rectified signal
- red signal
- redundant signal
- reference signal
- reorder signal
- request signal
- rering signal
- restoring signal
- retransmitted signal
- returned signal
- RF signal
- RGB signals
- right signal
- right-backward signal
- right-forward signal
- ringing signal
- robust signal
- round-the-world signal
- R-Y signal
- S-signal
- sampled signal
- saturated signal
- saturating signal
- saw-tooth signal
- scrambling signal
- sense signal
- shading compensation signal
- singing signal
- single-mode signal
- single-sideband signal
- small signal
- sound signal
- sounding signal
- space signal
- spacing signal
- speech signal
- spread-spectrum signal
- spurious signal
- square signal
- square-wave signal
- SSB signal
- staircase video signal
- standard composite picture signal
- standard-frequency signal
- standard television signal
- start signal
- start-record signal
- start-stop signal
- status signal
- steady-state signal
- stereo signal
- stereophonic signal
- stereophonic multiplex signal
- stop signal
- stop-record signal
- stuffed signal
- subscriber identification signal
- sum signal
- supersync signal
- supervisory signal
- swept signal
- sync signal
- synchronizing signal
- synchronous transport signal
- synthetic speech signal
- target signal
- television signal
- television relay signal
- television standard signal
- test signal
- test line signal
- test-pattern signal
- threshold signal
- time signal
- time-limited signal
- timing signal
- tracking signal
- trigger signal
- triggering signal
- tristimulus signals
- unstuffed signal
- unvoiced signal
- upstream signal
- vertical insertion test signal
- vertical interval signal
- vertical sync signal
- vestigial sideband signal
- video signal
- visual signal
- voice signal
- voiced signal
- weighted signal
- white signal
- write signal
- Y-signal

- acknowledgement sign
- active line duration sign
- actuating sign
- alarm indication signs
- alarm sign
- alias sign
- all-sky sign
- alternation mark inversion sign
- altitude sign
- AMI sign
- amplitude-modulated sign
- analog sign
- analog/mixed sign
- anisochronous digital sign
- antipodal sign
- ATF sign
- audio sign
- aural sign
- autoalarm sign
- automatic track finding sign
- band-limited sign
- bandpass sign
- baseband sign
- beam sign
- bidirectional sign
- binary sign
- bioelectric sign
- bipolar sign
- black peak sign
- black sign
- blanked picture sign
- blanking sign
- blocking sign
- blue sign
- broadband sign
- B-sign
- burst sign
- busy back sign
- busy sign
- busy-flash sign
- B-Y sign
- call progress sign
- call sign
- call-confirmation sign
- call-control sign
- called-number signs
- camera sign
- carrier chrominance sign
- carrier color sign
- carrier detect sign
- carry clear sign
- carry complete sign
- carry initiating sign
- carry sign
- case-shift sign
- CD sign
- challenging sign
- channel identification sign
- chirp sign
- chroma sign
- chrominance sign
- circuit available sign
- clear back sign
- clear forward sign
- clear sign
- clearing sign
- clipped sign
- clock sign
- coded sign
- coherent sign
- color identification sign
- color sign
- color video sign
- color-bar sign
- color-burst sign
- color-difference sign
- color-picture sign
- color-sync sign
- color-television sign
- command destruct sign
- common-mode sign
- comparison sign
- compelled sign
- compensation sign
- complex analytical sign
- component color sign
- component sign
- component video sign
- composite color sign
- composite picture sign
- composite sign
- composite video sign
- composite-one-line sign
- compressed sign
- confusion sign
- contaminating sign
- control sign
- convergence sign
- convolved signs
- course-fine encoded video sign
- dark-spot sign
- data sign
- DC sign
- decoded sign
- dehopped sign
- desired sign
- despread sign
- detectable sign
- deterministic sign
- difference sign
- differential-mode sign
- digital sign of level 0
- digital sign of level 1
- digital sign of level 1C
- digital sign of level 2
- digital sign of level 3
- digital sign of level 4
- digital sign
- direct-sequence sign
- direct-sequence spread-spectrum sign
- discernible sign
- disconnect sign
- disk changed sign
- distinguishable sign
- distress sign
- Doppler-invariant sign
- Doppler-shifted sign
- double-sideband sign
- downstream sign
- driving sign
- duobinary sign
- echo sign
- electric sign
- element difference sign
- emergency sign
- enabling sign
- enciphered sign
- end-of-block sign
- end-of-copy sign
- end-of-data sign
- end-of-impulsing sign
- end-of-message sign
- end-of-pulsing sign
- end-of-selection sign
- engaged sign
- erasure sign
- error sign
- excitatory sign
- facsimile framing sign
- facsimile phasing sign
- facsimile sign
- false sign
- fault sign
- feedback control sign
- field sawtooth sign
- figures-shift sign
- fluctuating sign
- flyback sign
- forward recall sign
- frame difference sign
- frame sync sign
- frame-alignment sign
- framing sign
- free-line sign
- frequency-hopped sign
- frequency-modulated sign
- frequency-shift sign
- FS sign
- full bandwidth sign
- gating sign
- Gaussian sign
- ghost sign
- global sign
- green sign
- G-sign
- guidance sign
- G-Y sign
- hang-up sign
- heterochronous digital signs
- high-frequency sign
- high-level sign
- homing sign
- homochronous digital signs
- horizontal sync sign
- IBG sign
- identification sign
- idle indication sign
- IF sign
- IFF target sign
- impulse sign
- incoming sign
- inhibiting sign
- inhibitory sign
- injected sign
- in-phase sign
- input sign
- insertion test sign
- intelligence sign
- inter-block gap sign
- interfering sign
- interfield test sign
- intermediate frequency sign
- international code sign
- interrogation sign
- interrupt sign
- inversion sign
- I-sign
- isochronous digital sign
- jamming sign
- L sign
- large sign
- laser sign
- LB sign
- left sign
- left-backward sign
- left-forward sign
- LF sign
- limited sign
- line identification sign
- line sawtooth sign
- line sync sign
- linear FM sign
- locking sign
- logic sign
- loop actuating sign
- loop difference sign
- loop error sign
- loop feedback sign
- loop input sign
- loop output sign
- loop return sign
- low-frequency sign
- low-level radio-frequency sign
- low-level sign
- luminance sign
- mark sign
- marking sign
- masking sign
- mesochronous digital signs
- message sign
- message-bearing sign
- microwave sign
- MIDI sign
- minimum detectable sign
- minimum discernible sign
- mixed sign
- modulating sign
- monochrome sign
- monophonic sign
- M-sign
- multimode sign
- multiplexed sign
- myoelectric sign
- N sign
- narrow-band sign
- naught sign
- negative-going sign
- neuroelectric sign
- noise sign
- noise-free sign
- noise-like sign
- noisy sign
- nominal detectable sign
- noncompelled sign
- noncomposite sign
- number received sign
- offering sign
- off-hook sign
- omnibearing sign
- on-course sign
- on-hook sign
- optical sign
- outcoming sign
- output sign
- P sign
- packetized sign
- partial-response sign
- PCM sign
- permanent sign
- phantom sign
- phase-modulated sign
- phase-shift keyed sign
- phase-shift sign
- phasing sign
- photoelectric sign
- pickup sign
- picture sign
- picture-phone sign
- picture-shading sign
- pilot sign
- playback sign
- plesiochronous digital signs
- polar sign
- positive-going sign
- print contrast sign
- probing sign
- program sign
- protected sign
- pseudonoise sign
- pseudorandom sign
- pseudo-ternary sign
- pulsar sign
- pulse-code modulation sign
- pulsed sign
- Q-sign
- quadrature-phase subcarrier sign
- quantized sign
- R sign
- radio sign
- radio star sign
- radio-frequency sign
- radiotelephone distress sign
- random sign
- RB sign
- read sign
- reading sign
- ready-to-receive sign
- rectified sign
- red sign
- redundant sign
- reference sign
- reorder sign
- request sign
- rering sign
- restoring sign
- retransmitted sign
- returned sign
- RF sign
- RGB signs
- right sign
- right-backward sign
- right-forward sign
- ringing sign
- robust sign
- round-the-world sign
- R-Y sign
- sampled sign
- saturated sign
- saturating sign
- saw-tooth sign
- scrambling sign
- sense sign
- shading compensation sign
- singing sign
- single-mode sign
- single-sideband sign
- small sign
- sound sign
- sounding sign
- space sign
- spacing sign
- speech sign
- spread-spectrum sign
- spurious sign
- square sign
- square-wave sign
- SSB sign
- S-sign
- staircase video sign
- standard composite picture sign
- standard television sign
- standard-frequency sign
- start sign
- start-record sign
- start-stop sign
- status sign
- steady-state sign
- stereo sign
- stereophonic multiplex sign
- stereophonic sign
- stop sign
- stop-record sign
- stuffed sign
- subscriber identification sign
- sum sign
- supersync sign
- supervisory sign
- swept sign
- sync sign
- synchronizing sign
- synchronous transport sign
- synthetic speech sign
- target sign
- television relay sign
- television sign
- television standard sign
- test line sign
- test sign
- test-pattern sign
- threshold sign
- time sign
- time-limited sign
- timing sign
- tracking sign
- trigger sign
- triggering sign
- tristimulus signs
- unstuffed sign
- unvoiced sign
- upstream sign
- vertical insertion test sign
- vertical interval sign
- vertical sync sign
- vestigial sideband sign
- video sign
- visual sign
- voice sign
- voiced sign
- weighted sign
- white sign
- write sign
- Y-sign

- acknowledgement sign
- active line duration sign
- actuating sign
- alarm indication signs
- alarm sign
- alias sign
- all-sky sign
- alternation mark inversion sign
- altitude sign
- AMI sign
- amplitude-modulated sign
- analog sign
- analog/mixed sign
- anisochronous digital sign
- antipodal sign
- ATF sign
- audio sign
- aural sign
- autoalarm sign
- automatic track finding sign
- band-limited sign
- bandpass sign
- baseband sign
- beam sign
- bidirectional sign
- binary sign
- bioelectric sign
- bipolar sign
- black peak sign
- black sign
- blanked picture sign
- blanking sign
- blocking sign
- blue sign
- broadband sign
- B-sign
- burst sign
- busy back sign
- busy sign
- busy-flash sign
- B-Y sign
- call progress sign
- call sign
- call-confirmation sign
- call-control sign
- called-number signs
- camera sign
- carrier chrominance sign
- carrier color sign
- carrier detect sign
- carry clear sign
- carry complete sign
- carry initiating sign
- carry sign
- case-shift sign
- CD sign
- challenging sign
- channel identification sign
- chirp sign
- chroma sign
- chrominance sign
- circuit available sign
- clear back sign
- clear forward sign
- clear sign
- clearing sign
- clipped sign
- clock sign
- coded sign
- coherent sign
- color identification sign
- color sign
- color video sign
- color-bar sign
- color-burst sign
- color-difference sign
- color-picture sign
- color-sync sign
- color-television sign
- command destruct sign
- common-mode sign
- comparison sign
- compelled sign
- compensation sign
- complex analytical sign
- component color sign
- component sign
- component video sign
- composite color sign
- composite picture sign
- composite sign
- composite video sign
- composite-one-line sign
- compressed sign
- confusion sign
- contaminating sign
- control sign
- convergence sign
- convolved signs
- course-fine encoded video sign
- dark-spot sign
- data sign
- DC sign
- decoded sign
- dehopped sign
- desired sign
- despread sign
- detectable sign
- deterministic sign
- difference sign
- differential-mode sign
- digital sign of level 0
- digital sign of level 1
- digital sign of level 1C
- digital sign of level 2
- digital sign of level 3
- digital sign of level 4
- digital sign
- direct-sequence sign
- direct-sequence spread-spectrum sign
- discernible sign
- disconnect sign
- disk changed sign
- distinguishable sign
- distress sign
- Doppler-invariant sign
- Doppler-shifted sign
- double-sideband sign
- downstream sign
- driving sign
- duobinary sign
- echo sign
- electric sign
- element difference sign
- emergency sign
- enabling sign
- enciphered sign
- end-of-block sign
- end-of-copy sign
- end-of-data sign
- end-of-impulsing sign
- end-of-message sign
- end-of-pulsing sign
- end-of-selection sign
- engaged sign
- erasure sign
- error sign
- excitatory sign
- facsimile framing sign
- facsimile phasing sign
- facsimile sign
- false sign
- fault sign
- feedback control sign
- field sawtooth sign
- figures-shift sign
- fluctuating sign
- flyback sign
- forward recall sign
- frame difference sign
- frame sync sign
- frame-alignment sign
- framing sign
- free-line sign
- frequency-hopped sign
- frequency-modulated sign
- frequency-shift sign
- FS sign
- full bandwidth sign
- gating sign
- Gaussian sign
- ghost sign
- global sign
- green sign
- G-sign
- guidance sign
- G-Y sign
- hang-up sign
- heterochronous digital signs
- high-frequency sign
- high-level sign
- homing sign
- homochronous digital signs
- horizontal sync sign
- IBG sign
- identification sign
- idle indication sign
- IF sign
- IFF target sign
- impulse sign
- incoming sign
- inhibiting sign
- inhibitory sign
- injected sign
- in-phase sign
- input sign
- insertion test sign
- intelligence sign
- inter-block gap sign
- interfering sign
- interfield test sign
- intermediate frequency sign
- international code sign
- interrogation sign
- interrupt sign
- inversion sign
- I-sign
- isochronous digital sign
- jamming sign
- L sign
- large sign
- laser sign
- LB sign
- left sign
- left-backward sign
- left-forward sign
- LF sign
- limited sign
- line identification sign
- line sawtooth sign
- line sync sign
- linear FM sign
- locking sign
- logic sign
- loop actuating sign
- loop difference sign
- loop error sign
- loop feedback sign
- loop input sign
- loop output sign
- loop return sign
- low-frequency sign
- low-level radio-frequency sign
- low-level sign
- luminance sign
- mark sign
- marking sign
- masking sign
- mesochronous digital signs
- message sign
- message-bearing sign
- microwave sign
- MIDI sign
- minimum detectable sign
- minimum discernible sign
- mixed sign
- modulating sign
- monochrome sign
- monophonic sign
- M-sign
- multimode sign
- multiplexed sign
- myoelectric sign
- N sign
- narrow-band sign
- naught sign
- negative-going sign
- neuroelectric sign
- noise sign
- noise-free sign
- noise-like sign
- noisy sign
- nominal detectable sign
- noncompelled sign
- noncomposite sign
- number received sign
- offering sign
- off-hook sign
- omnibearing sign
- on-course sign
- on-hook sign
- optical sign
- outcoming sign
- output sign
- P sign
- packetized sign
- partial-response sign
- PCM sign
- permanent sign
- phantom sign
- phase-modulated sign
- phase-shift keyed sign
- phase-shift sign
- phasing sign
- photoelectric sign
- pickup sign
- picture sign
- picture-phone sign
- picture-shading sign
- pilot sign
- playback sign
- plesiochronous digital signs
- polar sign
- positive-going sign
- print contrast sign
- probing sign
- program sign
- protected sign
- pseudonoise sign
- pseudorandom sign
- pseudo-ternary sign
- pulsar sign
- pulse-code modulation sign
- pulsed sign
- Q-sign
- quadrature-phase subcarrier sign
- quantized sign
- R sign
- radio sign
- radio star sign
- radio-frequency sign
- radiotelephone distress sign
- random sign
- RB sign
- read sign
- reading sign
- ready-to-receive sign
- rectified sign
- red sign
- redundant sign
- reference sign
- reorder sign
- request sign
- rering sign
- restoring sign
- retransmitted sign
- returned sign
- RF sign
- RGB signs
- right sign
- right-backward sign
- right-forward sign
- ringing sign
- robust sign
- round-the-world sign
- R-Y sign
- sampled sign
- saturated sign
- saturating sign
- saw-tooth sign
- scrambling sign
- sense sign
- shading compensation sign
- singing sign
- single-mode sign
- single-sideband sign
- small sign
- sound sign
- sounding sign
- space sign
- spacing sign
- speech sign
- spread-spectrum sign
- spurious sign
- square sign
- square-wave sign
- SSB sign
- S-sign
- staircase video sign
- standard composite picture sign
- standard television sign
- standard-frequency sign
- start sign
- start-record sign
- start-stop sign
- status sign
- steady-state sign
- stereo sign
- stereophonic multiplex sign
- stereophonic sign
- stop sign
- stop-record sign
- stuffed sign
- subscriber identification sign
- sum sign
- supersync sign
- supervisory sign
- swept sign
- sync sign
- synchronizing sign
- synchronous transport sign
- synthetic speech sign
- target sign
- television relay sign
- television sign
- television standard sign
- test line sign
- test sign
- test-pattern sign
- threshold sign
- time sign
- time-limited sign
- timing sign
- tracking sign
- trigger sign
- triggering sign
- tristimulus signs
- unstuffed sign
- unvoiced sign
- upstream sign
- vertical insertion test sign
- vertical interval sign
- vertical sync sign
- vestigial sideband sign
- video sign
- visual sign
- voice sign
- voiced sign
- weighted sign
- white sign
- write sign
- Y-sign