Explore topic-wise fullforms in Computer and Networking

Discontinuous transmission (DTX) is a means by which a mobile telephone is temporarily shut off or muted while the phone lacks a voice input.

Digital video is an electronic representation of moving visual images (video) in the form of encoded digital data. This is in contrast to analog video, which represents moving visual images in the form of analog signals. Digital video comprises a series of digital images displayed in rapid succession.

Digital video was first introduced commercially in 1986 with the Sony D1 format, which recorded an uncompressed standard definition component video signal in digital form. In addition to uncompressed formats, popular compressed digital video formats today include H.264 and MPEG-4. Modern interconnect standards used for playback of digital video include HDMI, DisplayPort, Digital Visual Interface (DVI) and serial digital interface (SDI).

Digital video can be copied and reproduced with no degradation in quality. In contrast, when analog sources are copied, they experience generation loss. Digital video can be stored on digital media such as Blu-ray Disc, on computer data storage, or streamed over the Internet to end users who watch content on a desktop computer screen or a digital smart TV. Today, digital video content such as TV shows and movies also include a digital audio soundtrack.

Digital Video Broadcasting (DVB) is a set of international open standards for digital television. DVB standards are maintained by the DVB Project, an international industry consortium, and are published by a Joint Technical Committee (JTC) of the European Telecommunications Standards Institute (ETSI), European Committee for Electrotechnical Standardization (CENELEC) and European Broadcasting Union (EBU).

A device under test (DUT), also known as equipment under test (EUT) and unit under test (UUT), is a manufactured product undergoing testing, either at first manufacture or later during its life cycle as part of ongoing functional testing and calibration checks. This can include a test after repair to establish that the product is performing in accordance with the original product specification.

INFO: Full form for DVB-T is DVB Terrestrial in Computer and Networking category
DVB-T also has other full forms in other categories mentioned below.

INFO: Full form for DVCC is Digital Verification Color Code in Computer and Networking category
DVCC also has other full forms in other categories mentioned below.

INFO: Full form for DVEM is Differential Vector Error Magnitude in Computer and Networking category

In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (i.e., colors) of laser light. This technique enables bidirectional communications over a single strand of fiber, also called wavelength-division duplexing, as well as multiplication of capacity.

The term WDM is commonly applied to an optical carrier, which is typically described by its wavelength, whereas frequency-division multiplexing typically applies to a radio carrier which is more often described by frequency. This is purely conventional because wavelength and frequency communicate the same information. Specifically, frequency (in Hertz, which is cycles per second) multiplied by wavelength (the physical length of one cycle) equals the velocity of the carrier wave. In a vacuum, this is the speed of light, usually denoted by the lower case letter, c. In glass fiber, it is substantially slower, usually about 0.7 times c. The data rate, which ideally might be at the carrier frequency, in practical systems is always a fraction of the carrier frequency.

INFO: Full form for DLCI is Data Link Connection Identifier in Computer and Networking category
DLCI also has other full forms in other categories mentioned below.

INFO: Full form for DMH is Data Message Handler in Computer and Networking category
DMH also has other full forms in other categories mentioned below.

INFO: Full form for DMP is Downlink Measurement Protocol in Computer and Networking category
DMP also has other full forms in other categories mentioned below.

INFO: Full form for DMTF is Desktop Management Task Force in Computer and Networking category
DMTF also has other full forms in other categories mentioned below.

INFO: Full form for DMIF is DSM-CC Multimedia Integration Framework in Computer and Networking category
DMIF also has other full forms in other categories mentioned below.

INFO: Full form for DNI is Digital Negotiation Information Signal in Computer and Networking category
DNI also has other full forms in other categories mentioned below.

INFO: Full form for DMOS is Degradation MOS in Computer and Networking category
DMOS also has other full forms in other categories mentioned below.

Dialed Number Identification Service (DNIS) is a service sold by telecommunications companies to corporate clients that identifies the originally dialed telephone number of an inbound call. The client may use this information for call routing to internal destinations or activation of special call handling.

For DNIS service, the telephone company sends a sequence of typically four to ten digits during call setup.

Direct inward dial (DID) service also provides DNIS.

For example, a company may have a different toll-free telephone number for each product line it sells, or for multilingual customer support. If a call center is handling calls for multiple product lines, the corporate telephone system that receives the call analyzes the DNIS signaling and may play an appropriate recorded greeting. For interactive voice response (IVR) systems, DNIS is used as routing information for dispatching purposes, to determine which script or service should be activated based on the number that was dialed to reach the IVR platform.

DNIS is commonly provided for 800 and 900 services.

INFO: Full form for DoD is Department of Defense (U.S.) in Computer and Networking category
DoD also has other full forms in other categories mentioned below.

INFO: Full form for DOE is Department of Energy (U.S.) in Computer and Networking category
DOE also has other full forms in other categories mentioned below.

INFO: Full form for DOL is Data Off-Loading in Computer and Networking category
DOL also has other full forms in other categories mentioned below.

INFO: Full form for DPA is Document Printing Application in Computer and Networking category
DPA also has other full forms in other categories mentioned below.

A business telephone system is a multiline telephone system typically used in business environments, encompassing systems ranging in technology from the key telephone system (KTS) to the private branch exchange (PBX).

A business telephone system differs from an installation of several telephones with multiple central office (CO) lines in that the CO lines used are directly controllable in key telephone systems from multiple telephone stations, and that such a system often provides additional features related to call handling. Business telephone systems are often broadly classified into key telephone systems, and private branch exchanges, but many hybrid systems exist.

A key telephone system was originally distinguished from a private branch exchange in that it did not require an operator or attendant at the switchboard to establish connections between the central office trunks and stations, or between stations. Technologically, private branch exchanges share lineage with central office telephone systems, and in larger or more complex systems, may rival a central office system in capacity and features. With a key telephone system, a station user could control the connections directly using line buttons, which indicated the status of lines with built-in lamps.

INFO: Full form for DPCM is Digital PCM Modem in Computer and Networking category
DPCM also has other full forms in other categories mentioned below.

INFO: Full form for DPS is Dynamic Power Save in Computer and Networking category
DPS also has other full forms in other categories mentioned below.

INFO: Full form for DPL is Digital Power Line (Q1/15) in Computer and Networking category
DPL also has other full forms in other categories mentioned below.

INFO: Full form for DPA is Data Privacy Algorithm in Computer and Networking category
DPA also has other full forms in other categories mentioned below.

INFO: Full form for DPS is Data Partitioned Slice in Computer and Networking category
DPS also has other full forms in other categories mentioned below.

INFO: Full form for DPNSS is Digital Private Network Signaling System in Computer and Networking category
DPNSS also has other full forms in other categories mentioned below.

Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency reference signal (the carrier wave). The modulation is accomplished by varying the sine and cosine inputs at a precise time. It is widely used for wireless LANs, RFID and Bluetooth communication.

Any digital modulation scheme uses a finite number of distinct signals to represent digital data. PSK uses a finite number of phases, each assigned a unique pattern of binary digits. Usually, each phase encodes an equal number of bits. Each pattern of bits forms the symbol that is represented by the particular phase. The demodulator, which is designed specifically for the symbol-set used by the modulator, determines the phase of the received signal and maps it back to the symbol it represents, thus recovering the original data. This requires the receiver to be able to compare the phase of the received signal to a reference signal – such a system is termed coherent (and referred to as CPSK).

CPSK requires a complicated demodulator, because it must extract the reference wave from the received signal and keep track of it, to compare each sample to. Alternatively, the phase shift of each symbol sent can be measured with respect to the phase of the previous symbol sent. Because the symbols are encoded in the difference in phase between successive samples, this is called differential phase-shift keying (DPSK). DPSK can be significantly simpler to implement than ordinary PSK, as it is a 'non-coherent' scheme, i.e. there is no need for the demodulator to keep track of a reference wave. A trade-off is that it has more demodulation errors.

INFO: Full form for DQoS is Dynamic Quality of Service in Computer and Networking category
DQoS also has other full forms in other categories mentioned below.

INFO: Full form for DRUMS is Detailed Revision/Update of Message in Computer and Networking category
DRUMS also has other full forms in other categories mentioned below.

INFO: Full form for DRQ is Disengage Request in Computer and Networking category
DRQ also has other full forms in other categories mentioned below.

INFO: Full form for DRP is ear Drum Reference Point in Computer and Networking category
DRP also has other full forms in other categories mentioned below.

INFO: Full form for DRR is Dynamic Rate Repartitioning in Computer and Networking category
DRR also has other full forms in other categories mentioned below.

INFO: Full form for DQUANT is Field for modified quantization mode (H.263+) in Computer and Networking category

INFO: Full form for DRA is Dynamic Rate Adaptation in Computer and Networking category
DRA also has other full forms in other categories mentioned below.

INFO: Full form for DRC is Dynamic Rate Change in Computer and Networking category
DRC also has other full forms in other categories mentioned below.