MTSO
Acronym of Mobile Telephone Switching Office.
Electrical engineering
651 entries in this trade.
multipath
A wireless propagation phenomenon that results in a signal reaching the receiving antenna by two or more paths.
multiplexer
A device that combines several input signals into a single output signal.
multipoint
adjectiveElectrical engineering
Connecting multiple service points.
N-facility
In the Open Systems Interconnection-Reference Model (OSI-RM), the transfer of data from one layer (N) to the next higher layer (N+1).
NAND gate
A logic gate performing a Boolean logic NAND operation.
negative logic
The use of the higher(positive) voltage level to represent the Boolean value 0 and the lower voltage(negative) level to represent the Boolean value 1.
negative-edge-triggered
adjectiveElectrical engineering
Describing a circuit or component that changes its state only when an input signal becomes low.
netco
The part of a telco that operates the network infrastructure.
netphone
A telephone that connects through the Internet.
network subsystem
The central subsystem of a particular mobile phone operating company in a GSM network.
night letter
A telegram sent overnight at a reduced rate for delivery on the morning of the following day, typically with a minimum charge for 25 words or less.
no-load
adjectiveElectrical engineering
Not supplying power; open-circuited.
non-essential prime implicant
On a Karnaugh map: a prime implicant which does not cover any 1 which cannot covered by some other prime implicant.
nonrepudiation
An assurance that the claimed sender or recipient is in fact the party who sent or received a given message.
NOR gate
A logic gate performing a Boolean logic NOR operation.
north pole
The positive pole of a magnetic dipole that seeks geographic north.
Norton'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 current source and resistor in parallel.
NOT gate
A logic gate performing a Boolean-logic NOT operation.
NSA
Initialism of non-standalone architecture.
nuclear magneton
The unit of magnetic moment used to describe nucleons such as the proton.
octal data rate
A memory interface which performs eight bits per clock cycle per lane
off time
The time interval when no current flows.
offset time
In optical burst switching, the amount of time between the burst header and the control packet.
ohmic resistance
That portion of the apparent resistance or impedance of a circuit which depends only upon the dimensions of the conductors, their temperature, and the materials of which they are composed.
Old World ROM
A Macintosh model that uses a read-only memory chip.
omnidirectional
adjectiveElectrical engineering
Having a ring-shaped radiation pattern, with equal radiation in all azimuthal directions.
one-cold
A set of bits with only a single low (0) bit, with the remaining bits high (1).
one-hot
A set of bits with only a single high (1) bit, with the remaining bits low (0).
online service provider
Any company, organization, or group that provides services over the Internet, including web hosting, Internet access, social media platforms, and cloud storage.
OPD
Initialism of overcurrent protective device.
operating time
The time interval between the instant a request for service is received from a user and the instant of final release of all facilities by the user or either of two users.
optical switch
A switch that can selectively change signals between optical fibers or integrated optical circuits.
OR gate
A logic gate performing a Boolean logic OR operation.
OSS
Initialism of operations/operational support system.
out-of-band
adjectiveElectrical engineering
Taking place outside of a defined telecommunications frequency band.
out-of-band signaling
A type of transmission technology in which signaling is separate from the data being transmitted, using one or more channels for transmitting data or voice information and one out-of-band channel for performing signaling functions.
out-of-battery
adjectiveElectrical engineering
In battery-powered electronics, devoid of any power.
overbuilder
A company that uses or builds on an existing telecommunications operator’s network (which includes telco and cable networks). These are often associated with advanced fiber-optic networks.
page
A message sent to someone's pager.
pager
A wireless telecommunications device that receives text or voice messages.
party line
A single telephone line which is shared by two or more households. Formerly common from the inception of telephony (1880s) through the mid-twentieth century.
paster
A diagram of the circuitry of a telephone, glued inside the telephone itself.
PBX
Initialism of private branch exchange.
PCS
Initialism of personal communication system.
PDC
Initialism of Personal Digital Cellular, a 2G mobile standard used in Japan.
peak shaving
The management by a utility of its demand for electricity over time, to reduce spikes in usage.
person-to-person
adjectiveElectrical engineering
Of a telephone call, such that the caller is only connected and charged if the person he specified is available to speak.
PFC
Initialism of power factor correction.
phase
In a polyphase electrical power system, one of the power-carrying conductors, or the alternating current carried by it.
phone tree
An interactive hierarchical menu of choices on an automated telephone system, navigated by the caller typically by entering or speaking digits, etc.
phonic wheel
A synchronous motor driven by a tuning fork that used an electromagnet to rotate the cogwheel of the motor by one tooth for each vibration.
picture tube
In a television set, before the development of LED screens, the cathode ray tube which produced moving images on its surface.
pigtailed
adjectiveElectrical engineering
Connected by means of a short additional wire.
pizza dish
A Kᵤ-band satellite dish used by direct broadcast satellite systems, ranging from 18 to 31 inches in diameter.
point charge
A point particle with a nonzero electric charge
point particle
An idealization of a particle that does not take up space.
polarity
A measure of the electrical potential at the ends of a circuit. ᵂᵖ
Polybius square
A character code represented by two sets of six lit torches, used to send messages character by character, in a two point visual fire telegraph. The character code is generated by encoding characters in a grid, where each character generates two numbers, uniquely representing each character as a pair of numbers.
polyphase
adjectiveElectrical engineering
Of, pertaining to, or involving multiple alternating currents that have the same frequency but differ in phase.