1GBC
Initialism of one-gigabaud fiber channel.
Electrical engineering
651 entries in this trade.
2G
adjectiveElectrical engineering
Referring to standards before 2.5G. Includes GSM, DMA, TDMA, iDEN, and PDC.
3G
adjectiveElectrical engineering
Abbreviation of 3rd generation, a cellular phone communication standard.
411
The telephonic information service.
802.11i
An IEEE standard specifying security mechanisms for 802.11 networks. 802.11i makes use of the Advanced Encryption Standard (AES) block cipher. The standard also includes improvements in key management, user authentication through 802.1X and data integrity of headers.
AAL
Initialism of asynchronous transfer mode adaptation layer; ATM adaptation layer.
abmho
A unit of measurement (10⁹ mhos) in the centimeter-gram-second scale used to measure conductance
AC
Initialism of alternating current (often used to indicate an alternating potential rather than a current).
ACD
Initialism of automatic call distributor.
ACI
Initialism of adjacent channel interference.
ACIR
Initialism of adjacent channel interference ratio.
acknowledgment
A response (ACK) sent by a receiver to indicate successful receipt of a transmission (See Wikipedia article on transmission).
acquisition time
The amount of time required for a GPS receiver to acquire a satellite signal in order to determine the initial position.
ACR
Initialism of automatic circuit recloser.
ACS
Initialism of adjacent channel selectivity.
ADC
Initialism of analog-to-digital converter.
adder-subtractor
A circuit that is capable of adding or subtracting binary numbers.
address message
a message sent in the forward direction that contains (a) address information, (b) the signaling information required to route and connect a call to the called line, (c) service-class information, (d) information relating to user and network facilities, and (e) call-originator identity or call-receiver identity.
Ader receiver
A kind of telephone receiver incorporating a magnetized metal ring.
ADPLL
Initialism of all-digital phase locked loop.
ADSL
Initialism of asymmetric digital subscriber line.
advanced time
The time when the field will advance from the present time t.
all-figure number
A telephone number consisting purely of digits, introduced in the 1960s to replace numbers that began with an alphabetic code for the exchange.
AMEPD
Initialism of active matrix electrophoretic display (EPD).
ANC
Initialism of active noise control or active noise cancellation.
Android
A mobile phone running on Android OS.
ANI
Initialism of automatic number identification.
anode
An electrode, of a cell or other electrically polarized device, through which a positive current of electricity flows inwards (and thus, electrons flow outwards). It can have either a positive or a negative voltage with respect to cathode of the same polarized device (depending on whether the device is a load or a source, respectively).
antimetric
adjectiveElectrical engineering
The converse of symmetric in electrical network theory, especially filter theory. A network where the input and output image impedances are the dual, or inverse, of each other as opposed to symmetric networks where they are equal.
app
An application (program), especially a small one designed for a mobile device.
arc blast
An explosion produced by the extreme heat of an uncontrolled high-energy electric arc.
arc fault
An undesired and uncontrolled electric arc from one conductor through the air (or other gas) to a conductor at ground potential or a different voltage phase.
arc flash
The extremely intense light and heat produced by a high-energy electric arc.
arc-fault circuit interrupter
A type of circuit breaker that detects signs of potentially-dangerous arcing on downstream wiring and shuts off power to the affected branch circuit to reduce the risk of a fire.
asymmetric digital subscriber line
A communications system characterised by moderately high speeds, different in each direction.
ATM
Initialism of asynchronous transfer mode.
attack time
The time between the instant that a signal at the input of a device or circuit exceeds the activation threshold of the device or circuit and the instant that the device or circuit reacts in a specified manner, or to a specified degree, to the input.
autosyn
A type of synchro, used as part of a system to reproduce angular rotation.
autotransformer
A transformer with a single winding, its output being taken from taps.
away message
An automated notification sent in response to incoming communications when the recipient is unavailable.
Baby Bell
Any of the Regional Bell Operating Companies resulting from the division of AT&T Corporation into a number of smaller companies in the 1980s as part of an antitrust agreement.
back-to-back connection
The direct connection of the output of one telecommunications device to the input of another.
band
A designated range of radio frequencies used for wireless communication.
base communications
Communications services, such as the installation, operation, maintenance, augmentation, modification, and rehabilitation of communications networks, systems, facilities, and equipment, including off-post extensions, provided for the operation of a military post, camp, installation, station, or activity.
base station subsystem
that section of a GSM network which is responsible for transmitting radio signals to and receiving radio signals from a mobile phone
baud
A unit of data transmission symbol rate; the number of signalling events per second.
BBS
Initialism of bulletin board system or bulletin board service.
beaconing
A continuous signaling of error conditions on a LAN, or small packets on a wireless LAN (WLAN).
BHCA
Initialism of busy-hour call attempts.
biased
adjectiveElectrical engineering
On which an electrical bias is applied.
big ugly dish
A C-band satellite dish used by television receive-only (TVRO) systems, ranging from 4 to 16 feet in diameter.
bit interval
The time required to send one signal bit.
bit stuffing
The insertion of non-information bits (binary digits) into a data stream.
bitrate
The frequency at which bits (binary digits) pass a given physical or metaphorical point, measured in bps (bits per second).
black noise
Technical silence; noise that has a frequency spectrum of predominantly zero power level over all frequencies except for a few narrow bands or spikes.
black spot
A location with poor radio signal reception, e.g. for mobile phones.
black start
The process of restoring an electric power station or part of an electric grid to operation without relying on the external electric power transmission network.
blocked
adjectiveElectrical engineering
Banned or barred from connecting or logging on.
blow a fuse
To overload a circuit sufficiently that a fuse protecting it melts away (or informally a circuit breaker trips), stopping current from flowing.
BNC
Initialism of Bajonet Neill-Concelman connector.