spudger
A hand tool used to work on punch-down blocks without short circuiting electric terminals. It has a hook on one end and a notched blade on the other.
Electrical engineering
651 entries in this trade.
squelch
To suppress the unwanted hiss or static between received transmissions by adjusting a threshold level for signal strength.
SRES
Acronym of signed response (to an authentication challenge on GSM mobile networks).
standby time
The maximum amount of time in which a mobile phone can be continuously turned on and ready to communicate.
static IP address
An IP address which is permanent and unchangeable when each time a user connects to their internet service provider.
station-to-station
A method of placing a telephone call in which the calling party will accept the placed call irrespective of respondent. This connection method has largely been superseded by direct dial connections.
STD
Initialism of subscriber trunk dialling or subscriber toll dialing.
storage station
A facility or system designed to store electrical energy for later use.
store and forward
The technique of having information sent to an intermediate station where it is kept and later relayed to its destination.
straight
adjectiveElectrical engineering
Sent at a full rate for immediate delivery; being a fast telegram.
streaming data
Data that is continuously generated by different sources and consumed in real-time.
streaming encoder
A tool that converts raw video and audio signals into a digital format suitable for transmission over the Internet.
structured wiring
A planned cabling system which systematically lays out the wiring and wire management necessary for communications, including voice, data, and video.
subcarrier
A separate signal carried on a main radio transmission, often carrying additional information such as voice or data.
subfeed
A part of an electricity or antenna feed.
submessage
A message that makes up part of another message.
subscriber trunk dialling
A system of automatic connection of trunk calls through dialling a phone number without operator assistance.
superband
A transmission band used in cable television in Europe.
supergroup
In the L-carrier system, a multiplexed group of channel groups.
surface-conduction electron-emitter display
a flat panel display technology that uses surface conduction electron emitters to provide electrons for every pixel. The electrons strike coloured phosphors to produce a colour image. In a general sense, an SED consists of a matrix of cathode ray tubes, each tube producing a single pixel.
SVoSIP
Secure Voice over Secure IP.
switch
A system of specialized relays, computer hardware, or other equipment which allows the interconnection of a calling party's telephone line with any called party's line.
switchboard
The electronic panel that is used to direct telephone calls to the desired recipient.
switchroom
A room, often an entire floor, containing switching equipment, especially for telephone lines.
symbol
A signalling event on a communications channel; a signal that cannot be further divided into meaningful information.
Sziklai pair
A configuration of two bipolar transistors, similar to a Darlington pair but having one NPN and one PNP transistor.
T-carrier
The generic designator for several digitally multiplexed signal carrier systems.
T-ray
An electromagnetic wave with a frequency intermediate between, and sharing the properties of, short radio waves and long infrared waves, generally in the 0.1 to 10 terahertz (THz) band of frequencies.
talk time
A prepaid amount of time on the bill agreement of a mobile phone.
tapping
A connection made to some point between the end terminals of a transformer coil or other component.
TCAP
Transaction Capabilities Application Part (SS7)
TCP/IP
Initialism of Transmission Control Protocol/Internet Protocol, a standard for computer network communication, used in particular for the Internet.
TDD
Initialism of telecommunications device for the deaf.
tech giant
A large company or corporation which works in the technology industry.
teledensity rate
The number of telephone lines per 100 people in a region.
telemetry
The science, and associated technology, of the automatic recording and transmission of data from a remote source to a receiving station for analysis.
telephone exchange
Any equipment that establishes connections between telephones.
thermal horsepower
The horsepower of an electric motor, determined by the readings from a thermal-type ammeter.
thin-film
adjectiveElectrical engineering
(of a circuit, electronic, etc.) Made with thin films deposited on a ceramic or glass substrate.
three-way switch
A type of light switch that can be arranged in pairs to control lights from two locations, as at either end of a stairway or long hallway; a double-throw switch. (UK): two-way switch.
throwbox
A stationary access point used to forward data in a delay-tolerant network.
Thévenin's theorem
A theorem which states that any electric circuit between two terminals containing only resistors, voltage sources, and current sources can be equivalently replaced with a single voltage source and resistor.
tickler coil
A small coil in series with the anode of a vacuum tube and coupled to the grid to provide feedback.
time and frequency transfer
A scheme where multiple sites share a precise reference time or frequency, commonly used for creating and distributing standard time scales such as International Atomic Time.
time difference of arrival
A technique used to determine the difference in arrival times of a signal at multiple receivers.
time diversity
The process of sending the same signal or components of a signal through a communication channel where the same signal is received at different times, used in order to compare, recover, or add to the overall quality of the received signal.
time division
A time slot allocated to one of multiple users when a common channel (multipoint or broadcast) is shared.
time lady
A female voice that is heard on a speaking clock that a person could dial to find out the current time, down to the second, before the age of the Internet and other options for finding out the time existed.
time of origin
The point in time in which a message is released for transmission.
time switch
A switch activated automatically at a preset time.
time-assignment speech interpolation
An analog technique used on certain long transmission links to increase voice transmission capacity.
time-delay relay
A type of relay consisting of a built-in time delay function.
time-frequency analysis
A technique that studies a signal in both the time and frequency domains simultaneously, using various time-frequency representations.
time-frequency representation
A view of a signal, taken to be a function of time, represented over both time and frequency.
time-hopping
A communications signal technique in which the transmission time is varied according to a pseudorandom sequence, useful in antijamming, etc.
time-of-use rates
A dynamic electric rate schedule that adjusts prices that are dependent on peak usage, as based on the time of day and season.
TM
Initialism of telephone manager.
tone dialing
A system of telephone dialing in which each digit is transmitted as a burst of a single audio frequency.
touch-tone dialing
A system of telephone dialing in which each digit is transmitted as a tone or combination of tones of specific pitch.
transform
To subject to the action of a transformer.