In telecommunications, a spectral mask, also known as a channel mask or transmission mask, is a mathematically-defined set of lines applied to the levels of radio ( or optical ) transmissions.

An automatic number announcement circuit ( ANAC ) is a special telephone number that is meant to be used by phone company technicians and other telecommunications technicians to determine the phone number of a particular line.

Asynchronous Transfer Mode ( ATM ) is, according to the ATM Forum, " a telecommunications concept defined by ANSI and ITU ( formerly CCITT ) standards for carriage of a complete range of user traffic, including voice, data, and video signals ," and is designed to unify telecommunication and computer networks.

In telecommunications, asynchronous communication is transmission of data without the use of an external clock signal, where data can be transmitted intermittently rather than in a steady stream .< ref >

A bit ( a contraction of binary digit ) is the basic capacity of information in computing and telecommunications ; a bit can have the value of either 1 or 0 ( one or zero ) only.

The byte () is a unit of digital information in computing and telecommunications that most commonly consists of eight bits.

The Ministry of Telecommunications controls all telecommunications originating within the country through its carrier unitary enterprise, Beltelecom, which is controlled as a monopoly.

The limited market in Brunei means that development in the telecommunications sector is stagnant.

Use of telecommunications is extremely low.

In telecommunications and computing, a product or technology is backward or downward compatible if it can work with input generated by an older product or technology.

However, this cipher is not a machine cipher and as such is not readily suitable for telecommunications.

Computer networking is sometimes considered a sub-discipline of electrical engineering, telecommunications, computer science, information technology or computer engineering, since it relies upon the theoretical and practical application of these disciplines.

* Socatel is the country's leading telecommunications and internet service provider.

However, after the signing of CAFTA, Costa Rica is now opened to competition in its insurance and telecommunications markets.

In many IT / telecommunications companies, this position is organically higher than the chief technical officer and includes release management and production.

The Canadian Radio-television and Telecommunications Commission ( CRTC, French: Conseil de la radiodiffusion et des télécommunications canadiennes ) is a public organisation in Canada with mandate as a regulatory agency for broadcasting and telecommunications.

The CRTC regulates all Canadian broadcasting and telecommunications activities and enforces rules it creates to carry out the policies assigned to it ; the best-known of these is probably the Canadian content rules.

The CRTC is run by up to 13 full-time ( including the chairman, the vice-chairman of broadcasting, and the vice-chairman of telecommunications ) and six part-time commissioners appointed by the Cabinet for renewable terms of up to five years.

The city is an international hub for finance, commerce, industry, telecommunications, and transportation, with O ' Hare International Airport being the second-busiest airport in the world in terms of traffic movements.

Telecom Cook Islands Ltd ( TCI ) is the sole provider of telecommunications in the Cook Islands.

The Dominican Republic is considered one of the countries with the most advanced telecommunications infrastructures in Latin America, with over 8. 9 million cell phones connected ( on just about 10 million populants, with 3. 5 million of them on extreme poverty conditions ) and large companies like Codetel and Orange ( FR ) on the telecommunications market.

The term " embedded database " can be confusing because only a small subset of embedded database products is used in real-time embedded systems such as telecommunications switches and consumer electronics devices.

* In telecommunications, lambda indicates the wavelength in a wavelength-division multiplexing optical communications system.

range-finding, telecommunications, infra-red countermeasures, spectroscopic sensing, generation of radio-frequency or terahertz waves, atomic clock state preparation, quantum key cryptography, frequency doubling and conversion, water purification ( in the UV ), and photodynamic therapy ( where a particular wavelength of light would cause a substance such as porphyrin to become chemically active as an anti-cancer agent only where the tissue is illuminated by light ).

These are often used to separate channels in telecommunications networks that use wavelength division multiplexing on long-haul optic fibers.

In the case where an individual end-to-end telecommunications service is provided by parallel channels, the parallel-channel signaling rate is given by, where PCSR is the total signaling rate for m channels, m is the number of parallel channels, T < sub > i </ sub > is the minimum interval between significant instants for the I-th channel, and n < sub > i </ sub > is the number of significant conditions of modulation for the I-th channel.

In telecommunications, the intercharacter interval is the time interval between the end of the stop signal of one character and the beginning of the start signal of the next character of an asynchronous transmission.

* In telecommunications, an isochronous signal is one where the time interval separating any two corresponding transitions is equal to the unit interval or to a multiple of the unit interval ; but phase is arbitrary ( and in some systems may change slowly over time ).

* Guard interval, intervals in transmission, used in telecommunications

* Guard interval, a delay used in telecommunications to prevent signal interference

In 1976, jurisdiction over telecommunications services, most of which were then delivered by monopoly common carriers ( for example, telephone companies ), was transferred to it from the Canadian Transport Commission although the abbreviation CRTC remained the same.

Use of voice over IP services such as Skype and Google Talk was prohibited by telecommunications legislation in 2002.

In telecommunications and signal processing, frequency modulation ( FM ) conveys information over a carrier wave by varying its instantaneous frequency.

This also applies to data transmission quantities over telecommunication circuits, as the telecommunications and computer networking industries have always used the SI prefixes with their standards-based meaning.

Indonesia has had a complex history of communications due to its spread over an extended archipelago-the importance on non-electronic means in the past has given away to a considerable infrastructure of telecommunications in the contemporary Indonesia.

When the People's Republic was founded in 1949, the telecommunications systems and facilities in China first established by the Qing and Republican ITA and Ministry of Posts and Communications had been seriously damaged from over thirty years of on and off war between warlords, Japan, and the two sides of the Chinese Civil War.

As of 1987 the quality of telecommunications services in China had improved markedly over earlier years.

Five cellular companies provide service to over 30 million subscribers, with South Africa considered to have the 4th most advanced mobile telecommunications network worldwide.

This reform should, amongst other things, facilitate the arrival of telephony services over cable television networks, television services over telecommunications networks, and Internet services over all types of networks.

From this tenuous beginning, the organization was to grow over the years to gain world standing on the international telecommunications stage.

The Plesiochronous Digital Hierarchy ( PDH ) is a technology used in telecommunications networks to transport large quantities of data over digital transport equipment such as fibre optic and microwave radio systems.

Multiplexing multiple telecommunications connections over the same physical conductor has been possible for a long time, but nonetheless each channel on the multiplexed link was either dedicated to one call at a time, or it was idle between calls.

** Fax, a telecommunications technology used to transfer copies of documents, especially over the telephone network

The maximum user signaling rate, synonymous to gross bitrate or data signaling rate, is the maximum rate, in bits per second, at which binary information can be transferred in a given direction between users over the telecommunications system facilities dedicated to a particular information transfer transaction, under conditions of continuous transmission and no overhead information.

In information technology, telecommunications, and related fields, handshaking is an automated process of negotiation, that dynamically sets parameters of a communications channel established between two entities before normal communication over the channel begins.

In telecommunications and computer networks, multiplexing ( also known as muxing ) is a method by which multiple analog message signals or digital data streams are combined into one signal over a shared medium.

* Transmission ( telecommunications ), the act of transmitting messages over distances

In telecommunications, telephony ( ) encompasses the general use of equipment to provide communication over distances, specifically by connecting telephones to each other.

In telecommunications, a voice operated switch, also known as VOX or Voice Operated eXchange, is a switch that operates when sound over a certain threshold is detected.