Telecommunications terms starting with O

263 terms

object An entity such as a file, folder, shared folder, printer, or Active Directory object, described by a distinct, named set of attributes.
object persistence In a video display, distortion wherein the entirety of some object (or objects) that appeared in a previous frame (and that should no longer appear)…
object retention In a video display, distortion in which a fragment of an object that appeared in a previous frame (and should no longer appear) remains in the current and…
object reuse 1. Reassignment and re-use of a storage medium containing one or more objects after ensuring no residual data remains on the storage medium.
Object-Oriented A software development approach that organizes software as a collection of objects containing both data structure and behavior.
obsolete In cryptography, pertaining to the state of a key that must no longer be used either to transmit information from the originator or to process received…
obsolete date In encryption, the date and time when a key becomes obsolete. [After X9.17]
OC Operations Center.
OCC Abbreviation for other common carrier.
Occupancy Indicates whether the property to which the loan application relates will be the owner's principal dwelling.
occupied bandwidth The width of a frequency band such that, below the lower and above the upper frequency limits, the mean powers emitted are each equal to a specified…
oceanographic data interrogating station A station in the maritime mobile service the emissions of which are used to initiate, modify or terminate functions of equipment directly associated with…
oceanographic data station A station in the maritime mobile service located on a ship, buoy, or other sensor platform the emissions of which are used for transmission of…
OCN An Operating Company Number (OCN) is a four place alphanumeric code that uniquely identifies providers of local telecommunications service.
OCR Optical Character Reader.
octet A byte of eight binary digits usually operated upon as an entity.
octet alignment The configuration of a field composed of an integral number of octets. Note: If the field is not divisible by eight, bits (usually zeros) are added to…
OD Optical Disk (PATRIOT).
odd parity See parity, parity check.
odd-even check Synonym parity check.
OFC Abbreviation for optical fiber, conductive. Note: OFC is the designation given by the National Fire Protection Association (NFPA) to interior fiber-optic…
OFCP Abbreviation for optical fiber, conductive, plenum. Note: OFCP is the designation given by the National Fire Protection Association (NFPA) to interior…
OFCR Abbreviation for optical fiber, conductive, riser. Note: OFCR is the designation given by the National Fire Protection Association (NFPA) to interior…
Off the Shelf Procurement of existing system or equipment without an RDT&E program or with minor development to make the system suitable for DoD needs.
off-axis optical system An optical system in which the optical axis of the aperture is not coincident with the mechanical center of the aperture.
off-hook In telephony, the condition that exists when an operational telephone instrument or other user instrument is in use, i.e., during dialing or communicating.
off-hook service Synonym hotline.
off-hook signal In telephony, of a circuit, a signal indicating seizure, request for service, or a busy condition.
off-line Pertaining to the operation of a functional unit when not under the direct control of the system with which it is associated.
off-line authentication certificate A particular form of authentication information binding an entity to a cryptographic key, certified by a trusted authority, which may be used for…
off-line cryptosystem [A] cryptosystem in which encryption and decryption are performed independently of the transmission and reception functions. [INFOSEC-99]
off-line recovery The process of recovering nonprotected message traffic by use of an off-line processor or central processing unit.
Off-Line Storage Electronic records stored or archived on removable disc (optical, compact, etc.
off-net calling The process by which telephone calls that originate or pass through private switching systems in transmission networks are extended to stations in a…
off-premises extension (OPX) An extension telephone, PBX station, or key system station located on property that is not contiguous with that on which the main telephone, PBX, or key…
off-the-air In radio communications systems, pertaining to a station that is completely shut down, i.e.
off-the-air monitoring In radio net operations, the listening, by the net-control station, to the transmissions of stations in the net, particularly to check the quality of…
offered load The total load submitted to a trunk group. This value may be corrected for retrials during the engineering process. [T1.Rpt 11-1991]
office classification Prior to divestiture, numbers that were assigned to offices according to their hierarchical function in the U.S. public switched telephone network.
offset You offset an options or futures position by taking a second position in a contract with identical terms, buying if you sold initially or selling if you…
offset encryption The process of encryption by using a key that has been offset. [After X9.28]
offset track In information assurance, a track written at a nonstandard position on a diskette, as part of a method of copy protection. [2382-pt.8]
OFN Abbreviation for optical fiber, nonconductive. Note: OFN is the designation given by the National Fire Protection Association (NFPA) to interior…
OFNP Abbreviation for optical fiber, nonconductive, plenum. Note: OFNP is the designation given by the National Fire Protection Association (NFPA) to interior…
OFNR Abbreviation for optical fiber, nonconductive, riser. Note: OFNR is the designation given by the National Fire Protection Association (NFPA) to interior…
oligarchically synchronized network A synchronized network in which the timing of all clocks is controlled by a selected few clocks.
Omega A term used to describe vertical motion in the atmosphere. The "omega equation" used in numerical weather models is composed of two terms, the…
omnidirectional antenna An antenna that has a radiation pattern that is nondirectional in azimuth. Note: The vertical radiation pattern may be of any shape.
omnidirectional range station A radionavigation land station in the aeronautical radionavigation service providing direct indication of the bearing (omnibearing) of that station from…
on-board communication station A low-powered mobile station in the maritime mobile service intended for use for internal communications on board a ship, or between a ship and its…
on-hook In telephony, the condition that exists when an operational telephone, or other user instrument, is not in use.
on-hook signal In telephony, of a circuit, a signal indicating a disconnect, unanswered call, or an idle condition.
on-hook state A state in which the customer installation (CI) presents a high-resistance path at the network interface. [T1.Rpt37-1994]
On-Line A unit that is operational, not dormant, but is not participating with on-going functions.
on-line authentication certificate A particular form of authentication information, certified by a trusted authority, which may be used for authentication following direct interaction with…
on-line cryptosystem [A] cryptosystem in which encryption and decryption are performed in association with the transmitting and receiving functions. [INFOSEC-99]
on-premises extension An extension telephone, PBX station, or key system station located on property that is contiguous with that on which the main telephone, PBX, or key…
on-premises wiring Customer-owned metallic or optical-fiber communications transmission lines, installed within or between buildings.
on-screen button A pictorial representation of a pushbutton on a display screen, which functions as a binary control, for example, on/off. [T1.232-1996]
on-the-air In radio communications systems, pertaining to a station that is transmitting a carrier, whether or not the carrier is modulated. 2.
ONA Abbreviation for open network architecture.
one-part code Code in which plain text elements and their accompanying code groups are arranged in alphabetical, numerical, or other systematic order, so one listing…
one-time cryptosystem Cryptosystem employing key used only once. [INFOSEC-99]
one-time pad 1. [ A] manual one-time cryptosystem produced in pad form. [INFOSEC-99] 2. The one time pad is the ONLY encryption scheme that can be proven to be…
one-way communication Communication in which information is always transferred in only one preassigned direction.
one-way encryption 1. A method of encryption used where a requirement exists to prevent the decryption of the cipher text, given full information about the algorithm [CESG].
one-way function 1. A transfer function f which is relatively easy to compute, but for which, for a general value, y , within the selected range, it is computationally…
one-way operation Synonym simplex operation.
one-way regulator A component which allows the transfer of information from one system to another, whilst providing a high level of confidence that information flow in the…
one-way reversible operation Synonym half-duplex operation.
one-way trunk A trunk between two switching centers, over which traffic may be originated from one preassigned location only.
one-way-only channel A channel capable of transmission in only one direction, which cannot be reversed. Synonym unidirectional channel.
online computer system A computer system that is a part of, or is embedded in, a larger entity, such as a communications system, and that interacts in real or near-real time…
online shopping A process in which images or listings of goods and services are viewed remotely via electronic means, e.g.
online software upgrade In computer networking, a software modification or installation performed remotely from an originating site (e.g.
opaque data objects A mechanism by which a program can manipulate data structures of any format, without knowing what that format might be [POSIX.6].
open circuit In communications, a circuit available for use. 2. In electrical engineering, a circuit that contains an essentially infinite impedance.
Open Circuit Test Line The term "Open Circuit Test Line" denotes an arrangement in an end office which provides an ac open circuit termination of a trunk or line by means of an…
open dual bus A dual bus in which the head-of-bus functions for both buses are at different locations.
open network architecture (ONA) In the context of the FCC's Computer Inquiry III, the overall design of a communication carrier's basic network facilities and services to permit all…
open specifications Public specifications that are maintained by an open, public consensus process to accommodate new technologies over time and that are consistent with…
open storage Storage of classified information within an accredited facility, but not in General Services Administration approved secure containers, while the facility…
open switching interval (OSI) An interval when the dc voltage applied between the tip and ring conductors of a line is removed, hence temporarily suspending line supervision and…
open system 1. A system with characteristics that comply with specified, publicly maintained, readily available standards and that therefore can be connected to other…
open system application program interface A combination of standards-based interfaces specifying a complete interface between an application program and the underlying application platform [POSIX.
open system environment (OSE) The comprehensive set of interfaces, services, and supporting formats, plus user aspects for interoperability or portability of applications, data, or…
open systems architecture The layered hierarchical structure, configuration, or model of a communications or distributed data processing system that (a) enables system description…
Open Systems Interconnection (OSI) Pertaining to the logical structure for communications networks standardized by the International Organization for Standardization (ISO).
Open Systems Interconnection (OSI)--Architecture Communications system architecture that adheres to the set of ISO standards relating to open systems architecture.
Open Systems Interconnection (OSI)--Protocol Specification The lowest level of abstraction within the OSI standards scheme. Note: Each OSI--Protocol Specification operates at a single layer.
Open Systems Interconnection (OSI)--Service Definitions The next lower level of abstraction below that of the OSI--Reference Model. The OSI--Service Definitions for each layer define the layer's abstract…
Open Systems Interconnection (OSI)--Systems Management In the Application Layer of the OSI--Reference Model (OSI--RM), the set of functions related to the management and status of various resources identified…
Open Systems Interconnection--Reference Model (OSI--RM) An abstract description of the digital communications between application processes running in distinct systems.
open video systems An alternative method to provide cable-like video service to subscribers.
open waveguide An all-dielectric waveguide in which electromagnetic waves are guided by a refractive index gradient so that the waves are confined to the guide by…
open wire Conductors that are separately supported with insulators on poles or towers above the surface of the Earth.
open-security environment In INFOSEC, an environment in which protection of data and resources from accidental or malicious acts is achieved through normal operational procedures.
operand An operand is an argument of an operator. Expressions involve combinations of operators and operands.
operating procedure A set of rules defining the correct use of a Target of Evaluation [ITSEC].
operating system Software which directs the overall activity of a computer (e.g. MS-DOS , Windows , Linux , etcetera).