Telecommunications terms starting with P

636 terms

preemption The seizure, usually automatic, of military system facilities that are being used to serve a lower precedence call in order to serve immediately a higher…
preemption tone In military telephone systems, a distinctive tone that is used to indicate to connected users, i.e.
prefix An "operator" that precedes its "operand", as in ++$x.
prefix-free code Synonym comma-free code.
pregroup combining In communications systems, assembling a number of narrowband channels, such as 4-kHz-wide telephone channels, into a specified frequency band such that…
pregroup translation In communications systems, the process of transposing, in frequency, a pregroup of channels, such as telephone or data channels, in such a manner that…
preliminary call In radio transmission, a call that (a) includes at least the identification of the calling station and the called station, (b) is designed to establish…
premature disconnect The termination of an established connection, where the termination is not initiated by either of the connected end-users. [Tl-507-1996]
premature disconnect stimulus The untimely occurrence of an event or a combination of events that, according to the protocol, should result in a disconnection.
premises wiring See on-premises wiring.
premodulation combining Synonym precombining.
Prescribed Interexchange Charge (PICC) The charge the local exchange company assesses the long distance company when a consumer picks it as his or her long distance carrier.
presence noise In telephony, a low-level artificial noise introduced into the receiver to indicate that the connection is still in effect, even though no voice sound is…
presentation context An association of an abstract syntax with a transfer syntax. [T1.208-1989]
Presentation Layer See Open Systems Interconnection--Reference Model.
presentation unit The smallest convenient division of a media stream (defined by the measurement system) that conveys an independent, self-contained unit of content, from…
preset conference A service feature that permits the automatic connection of a fixed group of users, or a closed user group with outgoing access, by keying a single…
preset jammer A jammer in which the frequency of the jamming transmitter is fixed before the transmitter is placed in operation.
press-to-talk operation Synonym push-to-talk operation.
press-to-type operation Synonym push-to-type operation.
preventive maintenance (PM) The care and servicing by personnel for the purpose of maintaining equipment and facilities in satisfactory operating condition by providing for…
PRF Pulse Repetition Frequency.
PRI Abbreviation for primary rate interface.
primary channel The channel that is designated as a prime transmission channel and is used as the first choice in restoring priority circuits. 2.
primary coating The plastic overcoat in intimate contact with the cladding of an optical fiber, applied during the manufacturing process.
primary colors Any group of two or more (three, in most applications) discrete colors (optical wavelengths) that are (a) of relatively narrow spectral width, and (b)…
primary distribution system A system of alternating current distribution for supplying the primaries of distribution transformers from the generating station or substation…
primary frequency A frequency that is assigned for usual use on a particular circuit. 2. The first-choice frequency that is assigned to a fixed or mobile station for…
primary frequency standard A frequency source that meets national standards for accuracy and operates without the need for calibration against an external standard.
primary group See group.
primary interexchange carrier (PIC) A carrier chosen by a subscriber to be accessible via simplified dialing pattern. [T1.246-1998/99]
primary point code (PPC) The point code identification of the primary destination of the signaling connection control plan (SCCP) routing verification test (SRVT) message. [T1.
primary polymer coating Synonym primary coating.
primary polymer overcoat Synonym primary coating.
primary power The source of electrical power that usually supplies the station main bus. Note 1: The primary power source may be a Government-owned generating plant or…
primary protector A protective device placed on telecommunications conductors in accordance with ANSI/NFPA 70. [T1.321-1995]
primary radar A radiodetermination system based on the comparison of reference signals with radio signals reflected from the position to be determined. [NTIA] [RR]
primary radiation Radiation that is incident upon a material and produces secondary emission from the material.
primary rate access (PRA) path The logical connection between extended superframe termination points (i.e., path terminations) on the customer access (CA) and the customer installation…
primary rate interface (PRI) An integrated services digital network (ISDN) interface standard (a) that is designated in North America as having a 23B+D channels, (b) in which all…
primary reference source Equipment that provides a timing signal whose long-term accuracy is maintained at 1 x 10-11 or better with verification to Coordinated Universal Time…
primary route The predetermined path of a message from its source, i.e., sending or originating station, to a message sink, i.e.
primary service area The service area of a broadcast station in which the groundwave is not subject to objectionable interference or objectionable fading. [47CFR]
primary station 1. In a data communication network, the station responsible for unbalanced control of a data link.
primary substation Equipment that switches or modifies voltage, frequency, or other characteristics of primary power.
primary time standard A time standard that does not require calibration against another time standard.
primary traffic Traffic measured or studied during one or more study weeks for which data are collected and processed.
primitive An abstract, implementation-independent, interaction between a layer service user and a layer service provider. [T1.629-1999]
Principal Face value of an obligation, such as a bond or a loan, that must be repaid at maturity.
principal clock Of a set of redundant clocks, the clock that is selected for normal use. Note 1: The principal clock may be selected because of a property, e.g.
principal colors Synonym primary colors.
principal ground point (PGP) A point within a structure that provides a means to join conductors requiring an earth reference to grounding electrodes.
principle of least privilege A security design principle that states that a person, process, or program be granted only those privileges necessary to accomplish a legitimate function…
print suppression [In INFOSEC,] eliminating the display of characters in order to preserve their secrecy. [INFOSEC-99]
print-through With respect to magnetically recorded data, especially tape-recorded data (analog or digital), the unintentional transfer of data from one physical…
priority The Bankruptcy Code's statutory ranking of unsecured claims that determines the order in which unsecured claims will be paid if there is not enough money…
priority level Each thread has a priority level, which indicates to the scheduler where it should be placed in the pecking order for being run.
priority level assignment The priority level(s) designated for the provisioning or restoration of a particular NS/EP telecommunications service.
priority message A category of precedence reserved for messages that require expeditious action by the addressee(s) and/or furnish essential information for the conduct of…
Privacy In genetics, the right of people to restrict access to their genetic information.
privacy and authentication management Functions to ensure the validity of both maintenance information and telecommunications network traffic key management, intrusion surveillance, and fraud…
privacy indicator In Signaling System 7 (SS7) switching, information contained in the calling-party number parameter, which information indicates whether the calling party…
privacy system [In INFOSEC, a] commercial encryption system that affords telecommunications limited protection to deter a casual listener, but cannot withstand a…
private automatic branch exchange (PABX) See PBX.
private automatic exchange (PAX) See PBX.
private branch exchange (PBX) See PBX.
private exchange (PX) A private telecommunication switch that usually includes access to the public switched network.
private key In secure communication, an algorithmic pattern used to encrypt messages that only the corresponding public key can decrypt.
private line 1. In telephone industry usage, a service that involves dedicated circuits, private switching arrangements, predefined transmission paths, or combination…
private line service A service for communications between specified locations for a continuous period or for regularly recurring periods at stated hours. [47 CFR Pt.36-A] 2.
Private Networks Private networks are composed of stations which are not directly accessible from all PSTN stations via the use of NANP E.164 numbers.
private NS/EP telecommunications services Non-common-carrier telecommunications services, including private line, virtual private line, and private switched network services.
private prime factors In cryptographic applications, the two prime numbers, namely p and q, whose product pq is the modulus n. [After X9.31]
privilege A benefit or advantage to certain persons beyond the advantages of other persons, i.e., an exemption, immunity, power, etc.
privileged access Explicitly authorized access of a specific user, process, or computer to a computer resource(s). [INFOSEC-99]
pro forma message A standard form of message, that has elements that usually are understood by prearrangement among the originator, the addressee, and the communications…
Probe A sequence of DNA or RNA, labeled or marked with a radioactive isotope, used to detect the presence of complementary nucleotide sequences. See Nucleotide.
procedure-oriented language A problem-oriented computer programming language that facilitates expressing a procedure in the form of explicit algorithms.
proceed-to-select In communications systems operation, pertaining to a signal or event in the call-access phase of a data call, which signal or event confirms the reception…
proceed-to-select signal In a communications system, a signal that indicates that the system is ready to receive a selection signal.
process A method of making something, a process of operating something or a process of using something. Under U.S. law, one of the statutory classes of inventions.
process computer system A computer system, with a process interface system, that monitors or controls a technical process.
process control Automatic control of a process, in which a computer system is used to regulate the usually continuous operations or processes.
process control equipment Equipment that measures the variables of a technical process, directs the process according to control signals from the process computer system, and…
process control system A system consisting of a computer, process control equipment, and possibly a process interface system.
process gain In a spread-spectrum communications system, the signal gain, signal-to-noise ratio, signal shape, or other signal improvement obtained by coherent band…
process interface system A functional unit that adapts process control equipment to the computer system in a process computer system.
processing unit A functional unit that consists of one or more processors and their internal storage.
processor a person who acts as a liason between your Loan Officer and the Underwriter to help facilitate the flow of paperwork which takes you from loan application…
processor outage A situation in which a signaling link becomes unavailable due to factors at a functional level higher than level 2.
procurement In the Federal Government, the process of obtaining services, supplies, and equipment in conformance with applicable laws and regulations.
procurement lead time The interval between the initiation of a procurement action and receipt of the products or services purchased as the result of such action.
Product A machine, an article of manufacture or a composition of matter. See Machine, Article of Manufacture, Composition of Matter. MPEP 2106.
product rationale A description of the security capabilities of a product, giving the necessary information for a prospective purchaser to decide whether it will help to…
Production The process of delivering to another party, or making available for that partys review, documents deemed responsive to a discovery request.
profile A sectional view showing grades and distances, usually taken along the centerline.
profile dip Synonym index dip.
profile dispersion See dispersion.
profile parameter (g) In the power-law index profile of an optical fiber, the parameter, g, that defines the shape of the refractive-index profile.
Program (1) A DoD acquisition program. (2) As a verb, schedule funds to meet requirements and plans. (3) A major, independent part of a software system.