Browse Definitions :

High-speed networks

Terms related to high-speed communication networks, including network and end-system architecture definitions and words and phrases about high-bandwidth and low-latency communication.

POI - WIR

  • point-of-presence (POP) - On the Internet, a point-of-presence (POP) is an access point from one place to the rest of the Internet.
  • preamble - A preamble is a signal used in network communications to synchronize transmission timing between two or more systems.
  • private automatic branch exchange (PABX) - A private automatic branch exchange (PABX) is an automatic telephone switching system within a private enterprise.
  • private branch exchange (PBX) - A private branch exchange (PBX) is a telephone system within an enterprise that switches calls between users on local lines, while enabling all users to share a certain number of external phone lines.
  • probe - In telecommunications generally, a probe is an action taken or an object used for the purpose of learning something about the state of the network.
  • PSTN (public switched telephone network) - The public switched telephone network, or PSTN, is the world's collection of interconnected voice-oriented public telephone networks.
  • Q signaling (QSIG) - Q signaling (abbreviated QSIG), a protocol for Integrated Services Digital Network (ISDN) communications based on the Q.
  • Q.931 - Q.931 (also called Q93 is a signaling protocol for Integrated Services Digital Network (ISDN) communications that is used in voice over IP (VoIP).
  • radio access network (RAN) - A radio access network (RAN) is a major component of a wireless telecommunications system that connects individual devices to other parts of a network through a radio link.
  • radio charging - Radio charging is a wireless charging method used to charge items with small batteries and low power requirements, such as watches, hearing aids and wireless keyboards and mice.
  • real time - Real time is a level of computer responsiveness that a user senses as sufficiently immediate or that enables the computer to keep up with some external process (for example, to present visualizations of the weather as it constantly changes).
  • real-time communications (RTC) - Real-time communications (RTC) is any mode of telecommunications in which all users can exchange information instantly or with negligible latency.
  • real-time location system (RTLS) - A real-time location system (RTLS) is one of a number of technologies used to pinpoint the current geographic position and location of a target.
  • Real-Time Transport Control Protocol (RTCP) - Real-Time Transport Control Protocol (RTCP) is a protocol that works with Real-Time Protocol (RTP) to monitor data delivery on large multicast networks, mainly for streaming media, telephony and video conferencing.
  • Real-time Transport Protocol (RTP) - Real-time Transport Protocol (RTP) is a network standard designed for transmitting audio or video data that is optimized for consistent delivery of live data.
  • regional Bell operating company (RBOC) - Regional Bell operating company (RBOC) is a term describing one of the U.
  • repeater - In digital communication systems, a repeater is a device that receives a digital signal on an electromagnetic or optical transmission medium and regenerates the signal along the next leg of the medium.
  • ringtone - On mobile phones, a ringtone is a brief audio file played to indicate an incoming call.
  • roaming service - Roaming service is the ability to get access to the Internet when away from home at the price of a local call or at a charge considerably less than the regular long-distance charges.
  • robocall - A robocall is a telephone call initiated by an autodialer to deliver a prerecorded message.
  • RS-232C - RS-232C is a long-established standard ("C" is the current version) that describes the physical interface and protocol for relatively low-speed serial data communication between computers and related devices.
  • satellite - A satellite is any object that orbits something else, as, for example, the Earth orbits the sun.
  • Seebeck effect - The Seebeck effect is a phenomenon in which a temperature difference between two dissimilar electrical conductors or semiconductors produces a voltage difference between the two substances.
  • serial digital interface (SDI) - Serial digital interface (SDI) is a standard for digital video and audio transmission over coaxial or fiber optic cabling.
  • service level - Service level describes, usually in measurable terms, the services a network service provider furnishes a customer within a given time period.
  • Service Profile Identifier (SPID) - In telecommunications, a Service Profile Identifier (SPID) is a number assigned by a phone company to a terminal on an Integrated Services Digital Network (ISDN) B-channel.
  • service-level agreement (SLA) - A service-level agreement (SLA) is a contract between a service provider and its customers that documents what services the provider will furnish and defines the service standards the provider is obligated to meet.
  • session border controller (SBC) - A session border controller (SBC) is a dedicated hardware device or software application that governs the manner in which phone calls are initiated, conducted and terminated on a voice over Internet Protocol (VoIP) network.
  • Shared Call Appearance (SCA) - Shared Call Appearance (SCA) is the sharing of a VoIP phone number across multiple devices in different locations.
  • shielded twisted pair (STP) - Shielded twisted pair (STP) is a special kind of copper telephone and local area network (LAN) wiring used in some business installations.
  • Short Message Service (SMS) - SMS (Short Message Service), commonly referred to as 'text messaging,' is a service for sending short messages of up to 160 characters (224 character limit if using a 5-bit mode) to mobile devices, including cellular phones, smartphones and tablets.
  • short message service center (SMSC) - The short message service center (SMSC) is the portion of a mobile phone network that handles text message operations.
  • sideband - In electronic signal transmission, a sideband is the portion of a modulated carrier wave that is either above or below the basic (baseband) signal.
  • signal - In electronics, a signal is an electric current or electromagnetic field used to convey data from one place to another.
  • signal-to-noise ratio (S/N or SNR) - In analog and digital communications, a signal-to-noise ratio, often written S/N or SNR, is a measure of the strength of the desired signal relative to background noise (undesired signal).
  • signaling - In telephony, signaling is the exchange of information between involved points in the network that sets up, controls, and terminates each telephone call.
  • Signaling System 7 (SS7) - Signaling System 7 (SS7) is an international telecommunication protocol standard that defines how the network elements in a public switched telephone network (PSTN) exchange information and control signals.
  • Signalling Connection Control Part (SCCP) - Signalling Connection Control Part (SCCP) is a portion of International Telecommunication Union (ITU) recommendation Q.
  • SIM card - A SIM card, also known as a subscriber identity module, is a smart card that stores identification information that pinpoints a smartphone to a specific mobile network.
  • SIP trunking (Session Initiation Protocol trunking) - Session Initiation Protocol trunking is a service offered by a communications service provider that uses the protocol to provision voice over IP connectivity between an on-premises phone system and the public switched telephone network.
  • Skinny Client Control Protocol (SCCP) - Skinny Client Control Protocol (SCCP) is a Cisco proprietary standard for terminal control for use with voice over IP (VoIP).
  • Skype - Skype is an Internet telephony service provider that offers free calling between computers and low-cost calling to regular telephones that aren't connected to the Internet.
  • Skype for Business - Skype for Business, formerly known as Microsoft Lync Server, is a unified communications (UC) platform that integrates common channels of business communication and online meetings, including instant messaging (IM), presence, voice over IP (VoIP), video conferencing, file transfer, web conferencing, voicemail and email.
  • small cell - A small cell is an umbrella term used to describe a miniature radio access point or wireless network base station with a low radio frequency power output, footprint and range.
  • SMiShing (SMS phishing) - SMiShing is a mobile phone security attack in which the user is tricked into downloading a Trojan horse, virus or other malware onto his phone.
  • SMS gateway - An SMS gateway is a website that allows users to send SMS messages from a web browser to people within the cell served by that gateway.
  • softphone (soft client telephone) - A softphone (software telephone) is an application program that enables voice over Internet Protocol (VoIP) telephone calls from computing devices.
  • spectrum efficiency - Spectrum efficiency describes the amount of data transmitted over a given spectrum or bandwidth with minimum transmission errors.
  • SPIT (spam over Internet telephony) - SPIT (spam over Internet telephony), sometimes known as vam (voice or VoIP spam), is unsolicited bulk messages broadcast over VoIP (Voice over Internet Protocol) to phones connected to the Internet.
  • spread spectrum - Spread spectrum is a form of wireless communications in which the frequency of the transmitted signal is deliberately varied.
  • Squid proxy server - Squid is a Unix-based proxy server that caches Internet content closer to a requestor than its original point of origin.
  • SRTP (Secure Real-Time Transport Protocol or Secure RTP) - SRTP (Secure Real-Time Transport Protocol or Secure RTP) is an extension to RTP (Real-Time Transport Protocol) that incorporates enhanced security features.
  • SSL VPN (Secure Sockets Layer virtual private network) - An SSL VPN is a type of virtual private network (VPN) that uses the Secure Sockets Layer (SSL) protocol -- or, more often, its successor, the Transport Layer Security (TLS) protocol -- in standard web browsers to provide secure, remote access VPN capability.
  • static IP address - A static IP address is a 32 bit number that is assigned to a computer to be its address on the internet.
  • subcarrier - A subcarrier is a secondary modulated signal frequency modulated into the main frequency (the carrier) to provide an additional channel of transmission.
  • Switched Multimegabit Data Service (SMDS) - Switched Multimegabit Data Service (SMDS) is a public, packet-switched service aimed at enterprises that need to exchange large amounts of data with other enterprises over the wide area network on a nonconstant or bursty basis.
  • Synchronous Digital Hierarchy (SDH) - Synchronous Digital Hierarchy (SDH) is a group of fiber optic transmission rates that transport digital signals with different capacities.
  • T-carrier system - To see the relationship between T-carrier, E-carrier, and DS0 multiples, see digital signal X.
  • T1 (T-1) - Also see the T-carrier system, of which the T1 is a part.
  • TAPI (Telephony Application Program Interface) - TAPI (Telephony Application Program Interface) is a standard program interface that lets you and your computer "talk" over telephones or video phones to people or phone-connected resources elsewhere in the world.
  • telecommunications (telecom) - Telecommunications, also known as telecom, is the exchange of information over significant distances by electronic means and refers to all types of voice, data and video transmission.
  • teleconference - A teleconference is a live audio or audio-visual meeting with two or more participants.
  • telephony - Telephony is technology associated with interactive communication between two or more physically distant parties via the electronic transmission of speech or other data.
  • ternary content-addressable memory (TCAM) - Ternary content-addressable memory (TCAM) is a specialized type of high-speed memory that searches its entire contents in a single clock cycle, with the term “ternary” referring to its ability to store and query data using three different inputs: 0, 1 and X.
  • text messaging (texting or wireless messaging) - Text messaging is the act of sending short, alphanumeric communications between cellphones, pagers or other hand-held devices, as implemented by a wireless carrier.
  • Time Division Multiple Access (TDMA) - Time Division Multiple Access (TDMA) is a digital modulation technique used in digital cellular telephone and mobile radio communication.
  • time-division multiplexing (TDM) - Time-division multiplexing (TDM) is a method of putting multiple data streams in a single signal by separating the signal into many segments, each having a very short duration.
  • Top searches of 2008 - What were people searching the WhatIs.
  • transceiver - A transceiver is a combination transmitter/receiver in a single package.
  • trunk (trunking) - A network trunk is a communications line or link designed to carry multiple signals simultaneously to provide network access between two points.
  • UCaaS (Unified Communications as a Service) - Unified communications as a service (UCaaS) is a cloud delivery model that offers a variety of communication and collaboration applications and services.
  • Ultra Low Energy (ULE) - Ultra Low Energy (ULE) is a telecommunications technology based on DECT (Digital Enhanced Cordless Telecommunications) which is the de-facto standard for voice calls, integrated in millions of devices worldwide.
  • unified communications (UC) - Unified communications (UC) is an umbrella term for the integration of multiple enterprise communication tools -- such as voice calling, video conferencing, instant messaging (IM), presence, content sharing, etc.
  • United Launch Alliance (ULA) - United Launch Alliance (ULA) is a private aerospace launch provider.
  • unlocked cell phone - An unlocked cell phone is a cellular telephone handset that can be used with more than one service provider, making it easy for a user to switch from one cellular network to another.
  • vestigial sideband (VSB) - Vestigial sideband (VSB) is a type of amplitude modulation (AM) technique (sometimes called VSB-AM) that encodes data by varying the amplitude of a single carrier frequency.
  • video telephony - Video telephony is full-duplex, real-time audio-visual communication between or among end users.
  • virtual classroom - A virtual classroom is an online learning environment.
  • virtual phone number - A virtual phone number is a telephone number is used to route calls to the user's actual phone number or numbers.
  • vishing (voice or VoIP phishing) - Vishing (voice or VoIP phishing) is an electronic fraud tactic in which individuals are tricked over the phone into revealing critical financial or personal information to unauthorized entities.
  • voice activation detection (VAD) - In Voice over IP (VOiP), voice activation detection (VAD) is a software application that allows a data network carrying voice traffic over the Internet to detect the absence of audio and conserve bandwidth by preventing the transmission of "silent packets" over the network.
  • voice over LTE (VoLTE) - Voice over LTE (VoLTE) is a digital packet technology that uses 4G LTE networks to route voice traffic and transmit data.
  • voice recognition (speaker recognition) - Voice or speaker recognition is the ability of a machine or program to receive and interpret dictation or to understand and carry out spoken commands.
  • voice search - Voice search is a speech recognition technology that allows users to search by saying terms aloud rather than typing them into a search field.
  • voice-to-text - Voice-to-text is a type of speech recognition program that converts spoken to written language.
  • voicemail - Voicemail is a method of storing voice messages electronically for later retrieval by intended recipients.
  • VoiceXML - VoiceXML is an application of the Extensible Markup Language (XML) which, when combined with voice recognition technology, enables interactive access to the Web through the telephone or a voice-driven browser.
  • VoIP (voice over Internet Protocol) - VoIP (voice over Internet Protocol) is the transmission of voice and multimedia content over an internet connection.
  • VoIP caller ID (voice over Internet Protocol caller identification) - VoIP caller ID (voice over Internet Protocol caller identification) is a caller ID application for VoIP phones that works in the same way as caller ID on a conventional telephone line.
  • VoIP phone - A VoIP phone is a hardware- or software-based telephone designed to use voice over Internet Protocol (VoIP) technology to send and receive phone calls over an IP network.
  • VoIP trunk gateway - A VoIP trunk gateway is an interface that facilitates the use of plain old telephone service (POTS) equipment, such as conventional phone sets and fax machines, with a voice over IP (VoIP) network.
  • Vonage - Vonage is a communication platform as a service (CPaaS) provider for consumers and businesses that makes it possible for customers to connect and communicate on any device through cloud-hosted voice, video, chat and short message service (SMS).
  • VSAT (Very Small Aperture Terminal) - VSAT (Very Small Aperture Terminal) is a satellite communications system that serves home and business users.
  • WAN (wide area network) - A wide area network (WAN) is a geographically distributed telecommunications network that interconnects multiple local area networks (LANs).
  • weighted fair queueing (WFQ) - Weighted fair queueing (WFQ) is a method of automatically smoothing out the flow of data in packet-switched communication networks by sorting packets to minimize the average latency and prevent exaggerated discrepancies between the transmission efficiency afforded to narrowband versus broadband signals.
  • What is 5G? - Fifth-generation wireless (5G) is the latest iteration of cellular technology.
  • Wi-Fi cell phone (cellular-Internet phone or cell-Internet phone) - A Wi-Fi cell phone (also called a cellular-Internet phone or cell-Internet phone) is a wireless telephone set that can automatically switch between conventional cellular and Wi-Fi VoIP modes, even during the course of a conversation.
  • wideband audio (HD voice) - Wideband audio, also known as HD voice, is a cellular technology that utilizes a wider frequency spectrum to achieve greater voice quality during phone calls.
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