Telecommunication protocols

thumb|A residential gateway|gateway is commonly used to make an ADSL connection Asymmetric digital subscriber line (ADSL) is a type of digital subscriber line (DSL) technology, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. ADSL differs from the less common symmetric digital subscriber line (SDSL). In ADSL, bandwidth and bit rate are said to be asymmetric, meaning greater toward the customer premises (downstream) than the reverse (upstream). Providers usually market ADSL as an Internet access s

a simple data link layer protocol used between two devices

X.25 is an ITU-T standard protocol suite for packet-switched data communication in wide area networks (WAN). It was originally defined by the International Telegraph and Telephone Consultative Committee (CCITT, now ITU-T) in a series of drafts and finalized in a publication known as The Orange Book in 1976.

Very high-speed digital subscriber line (VDSL) and very high-speed digital subscriber line 2 (VDSL2) are digital subscriber line (DSL) technologies providing data transmission faster than the earlier standards of asymmetric digital subscriber line (ADSL) G.992.1, G.992.3 (ADSL2) and G.992.5 (ADSL2+).

messaging application developed by Google LLC

bit-oriented code-transparent synchronous data link layer protocol

ID sent in digital form over a radio frequency to uniquely identify a ship

The E-carrier is a member of the series of carrier systems developed for digital transmission of many simultaneous telephone calls by time-division multiplexing. The European Conference of Postal and Telecommunications Administrations (CEPT) originally standardised the E-carrier system, which revised and improved the earlier American T-carrier technology, and this has now been adopted by the International Telecommunication Union Telecommunication Standardization Sector (ITU-T). It was widely used in almost all countries outside the US, Canada, and Japan. E-carrier deployments have steadily bee

cryptographic protocol

telecommunications protocol standardized in 1994, developed to transport DS1 services at 1.544 Mbit/s and 2.048 Mbit/s over telephone local loops without a need for repeaters

marine radio standard

G.992.5 (also referred to as ADSL2+, G.dmt.bis+, and G.adslplus) is an ITU-T standard for asymmetric digital subscriber line (ADSL) broadband Internet access. The standard has a maximum theoretical downstream sync speed of 24 megabits per second (Mbit/s). Utilizing G.992.5 Annex M upstream sync speeds of 3.3 Mbit/s can be achieved.

type of additive noise gate

computer communications protocol from IBM's Systems Network Architecture (SNA)

ITU-T G.984 is the series of standards that define the architecture and operation of gigabit-per-second–capable passive optical network (GPON). It is commonly used to implement the link to the customer (the last kilometre, or last mile) of fibre-to-the-premises (FTTP) services, using a point-to-multipoint design. GPON supporting a shared bandwidth of downstream data rates of up to 2.4 Gbit/s and normally upstream rates of up to 1.2 Gbit/s.

ITU-specified system description language

thumb|right|Left: A 66 block; center and right: Cabinets containing [[Smartjack network interface devices for T1 circuits]]

protocol for Signalling System 7 networks

computer network protocol

QSIG is an ISDN based signaling protocol for signaling between private branch exchanges (PBXs) in a private integrated services network (PISN). It makes use of the connection-level Q.931 protocol and the application-level ROSE protocol. ISDN "proper" functions as the physical link layer.

ITU-T recommendation for modems

type of serial number

computer network protocol

communications protocol that sees the transmitted data as an opaque stream of bits

Mobile subscription identification number

IEEE standard version