Telecommunications — page 66 of 85

Telecommunications terms

6501. RJ Abbreviation for registered jack.
6502. RJE Abbreviation for remote job entry.
6503. rms pulse duration See root-mean-square pulse duration.
6504. RO Receiving Office - the national Office or the intergovernmental organization with which an international application has been filed.
6505. roaming In cellular technology (mobile telephone technology), the use of a wireless telephone outside a specified tariffed geographic area defined by the service…
6506. Robot Any browser program which follows hypertext links and accesses web pages but is not directly under human control...
6507. robotic librarian Synonym droid.
6508. role See site group.
6509. ROM Read Only Memory - the hardware in a computer that that can be read but not written to.
6510. roofing filter A low-pass filter used to reduce unwanted higher frequencies.
6511. room noise level Synonym ambient noise level.
6512. room preset In multimedia and virtual reality, information that may be used to select a video source, and then control the video source to provide the desired view.
6513. root To trap a target in place/stuck using a "root" type spell such as Entangling Roots.
6514. root-mean-square (rms) deviation A single quantity, rms, characterizing a function, f(x), given by Note: The term "rms deviation" is also used in probability and statistics, where the…
6515. root-mean-square (rms) pulse broadening The temporal rms deviation of the impulse response of a system.
6516. root-mean-square (rms) pulse duration A special case of root-mean-square deviation where the independent variable is time and f(t) describes the pulse waveform.
6517. rope lay conductor A conductor composed of a central core surrounded by one or more layers of helically wound groups of wires.
6518. rotary dial A signaling mechanism--usually incorporated within a telephone set--that when rotated and released, generates dc pulses required for establishing a…
6519. rotary hunting Hunting in which all the numbers in the hunt group are selected in a prescribed order.
6520. rotary switching In telephone systems, an electro-mechanical switching method whereby the selecting mechanism consists of a rotating element using several groups of…
6521. rotational position sensing [In magnetic media,] A technique used to locate a given sector, a desired track, and a specific record by continuous comparison of the read/write head…
6522. round-trip delay time The elapsed time for transit of a signal over a closed circuit. Note: Round-trip delay time is significant in systems that require two-way interactive…
6523. rounding Deleting the least-significant digits of a number and applying some rule of correction to the part retained. [After SMPTE]
6524. route A route of administration is a way of administering a drug to a site in a patient.
6525. route diversity The allocation of circuits between two points over more than one geographic or physical route with no geographic points in common.
6526. route index A pointer to a specific trunk group. [T1.667-1999]
6527. route list A specific list of trunk groups. [After T1.667-1999]
6528. route matrix In communications network operations, a record that indicates the interconnections between pairs of nodes in the network, and is used to produce direct…
6529. route verification Procedures that permit a signaling point to determine the accuracy and consistency of its routing data by sending a test message and analyzing the…
6530. Router A piece of hardware that forwards data packets between two or more networks.
6531. routine A computer program, called by another program, that may have some general or frequent use.
6532. routine message A category of precedence to be used for all types of messages that justify transmission by rapid means unless of sufficient urgency to require a higher…
6533. Routing The methods of predicting the attenuation of a flood wave as it moves down the course of a river.
6534. routing address Synonym routing number, routing table.
6535. routing control The application of rules during the process of routing so as to chose or avoid specific networks, links or relays [7498-2].
6536. routing diagram In a communications system, a diagram that (a) shows all links between all switchboards, exchanges, switching centers, and stations in the system, such as…
6537. routing directory See routing table.
6538. routing indicator (RI) A group of letters assigned to indicate: (a) the geographic location of a station; (b) a fixed headquarters of a command, activity, or unit at a…
6539. routing label The part of the message label that is used for message routing in the signaling network.
6540. routing number Synonym routing address, routing table.
6541. routing protocol In an internet, a service protocol that is used (by routers, but not by hosts) to maintain routing tables; routing protocols are classified as either (a)…
6542. routing table Contains information that the MTA needs to route messages. [Exchange 5.5]
6543. RQ Abbreviation for repeat-request. See ARQ.
6544. RSA (Rivest-Shamir-Adleman) RSA is a public key encryption method RSA are the initials of the developers of the algorithm which was done at taxpayer expense.
6545. RSAREF This is the free library RSA Data Security, Inc., made available for the purpose of implementing freeware PEM applications.
6546. RSL Abbreviation for received signal level.
6547. RTA Abbreviation for remote trunk arrangement.
6548. RTTY Abbreviation for radio teletypewriter.
6549. rubidium clock A clock containing a quartz oscillator stabilized by a rubidium standard.
6550. rubidium standard A frequency standard in which a specified hyperfine transition of electrons in rubidium-87 atoms is used to control the output frequency.
6551. Rule-Based Security Policy A security policy based on global rules imposed for all subjects. These rules usually rely on a comparison of the sensitivity of the objects being…
6552. Run Seasonal upstream migration of anadromous fish. One or more lengths of pipe that continue in a straight line.
6553. run-length encoding A data compression technique for storing raster or gridded data. Run-length encoding stores data by row.
6554. rural radio service A public radio service rendered by fixed stations on frequencies below 1000 MHz used to provide (1) Basic Exchange Telecommunications Radio Service, which…
6555. rural subscriber station A fixed station in the rural radio service used by a subscriber for communication within a central office station. 2.
6556. RWI Abbreviation for radio and wire integration.
6557. RX (1) Receive. (2) Receiver. 253
6558. RZ Abbreviation for return-to-zero.
6559. S 1) South or 2) Snow
6560. S interface For basic rate access in an Integrated Services Digital Network (ISDN) environment, a user-to-network interface reference point that (a) is characterized…
6561. S reference point The conceptual reference point dividing the TEI (terminal endpoint identifier) and the NT2 (network termination 2) in a particular ISDN access arrangement.
6562. S-F Abbreviation for store-and-forward.
6563. safeguarding statement [A] statement affixed to a computer output or printout that states the highest classification being processed at the time the product was produced and…
6564. safety service Any radiocommunication service used permanently or temporarily for the safeguarding of human life and property. [NTIA] [RR]
6565. sample key Key intended for off-the-air demonstration use only. [INFOSEC-99]
6566. sampled data Data in which the information content exists only for instantaneous values measured or determined at or for discrete intervals.
6567. sampling The process of digitizing analog information to identify relevant information.
6568. sampling frequency The rate at which sensor data is read or sampled.
6569. sampling interval The reciprocal of the sampling rate, i.e., the interval between corresponding points on two successive sampling pulses of the sampling signal.
6570. Sampling Rate The frequency at which analog signals are converted to digital values during digitization. The higher the rate, the more accurate the process.
6571. sampling theorem Synonym Nyquist's theorem.
6572. sanitize [In INFOSEC, the] process to remove information from media such that data recovery is not possible.
6573. sanitizing Of a recording medium, erasing or overwriting all data in such a manner that it cannot be recovered, even by extraordinary, e.g., laboratory, means.
6574. SAP Fluid content of the xylem and phloem cells of plants. Fluid content of the vacuole generally referred to as cell sap.
6575. satellite A chromosomal segment that branches off from the rest of the chromosome but is still connected by a thin filament or stalk.
6576. satellite access In satellite communications systems, the establishment of contact with a communications satellite space station.
6577. satellite communications A telecommunications service provided via one or more satellite relays and their associated uplinks and downlinks.
6578. satellite digital audio radio service (SDARS) A satellite-based direct-broadcast radio service in which digitally encoded audio entertainment material is broadcast to Earth-based receivers, either…
6579. satellite Earth terminal Synonym Earth terminal.
6580. satellite emergency position-indicating radiobeacon An Earth station in the mobile-satellite service the emissions of which are intended to facilitate search and rescue operations. [RR]
6581. Satellite Home Viewer Improvement Act Of 1999 (SHVIA) An Act modifying the Satellite Home Viewer Act of 1988, SHVIA permits satellite companies to provide local broadcast TV signals to all subscribers who…
6582. satellite link A radio link between a transmitting Earth station and a receiving Earth station through one satellite.
6583. Satellite Master Antenna Television (SMATV) A satellite dish system used to deliver signals to multiple dwelling units (e.g., apartment buildings and trailer parks).
6584. satellite network A satellite system or a part of a satellite system, consisting of only one satellite and the cooperating Earth stations. [RR] 2.
6585. satellite operation See satellite PBX.
6586. satellite PBX A PBX system that is not equipped with attendant positions, and is associated with an attended main PBX system.
6587. satellite period See period (of a satellite).
6588. satellite relay An active or passive satellite repeater that relays signals between two terminals.
6589. satellite system A space system using one or more artificial Earth satellites. [NTIA] [RR] [47CFR]
6590. Saturation Saturation The condition in which the partial pressure of any fluid constituent (water in the atmospheric air) is equal to its maximum possible partial…
6591. Scalability The capacity of a system to expand without requiring major reconfiguration or re-entry of data.
6592. scan A picture of structures inside the body. Scans often used in diagnosing, staging, and monitoring disease include liver scans, bone scans, and computed…
6593. scan line The line produced on a recording medium frame by a single sweep of a scanner. [JP1] 2. Synonym scanning line.
6594. scan-stop lockup In automatic link establishment (ALE) radios, the undesired condition in which the normal process of (a) scanning radio channels, (b) stopping on the…
6595. scanner In medicine, an instrument that takes pictures of the inside of the body.
6596. Scanning Scanning is the process of converting a hard copy paper document into a digital image for use in a computer system.
6597. scanning direction In facsimile transmitting equipment, the scanning of an object, such as a message surface or the developed plane in the case of a drum, along parallel…
6598. scanning field In facsimile systems, the total of the areas that are actually explored by the scanning spot during the scanning of the object by the transmitter or…
6599. scanning line In an imaging system, the path traversed by a scanning spot during a single line sweep.
6600. scanning line frequency In facsimile, the frequency at which a fixed line perpendicular to the direction of scanning is crossed by a scanning spot.