Block (telecommunications)

Block (telecommunications)

In telecommunications a block is one of:
* A group of bits or digits that is transmitted as a unit and that may be encoded for error-control purposes.
* A string of records, words, or characters, that for technical or logical purposes are treated as a unit. Blocks (a) are separated by interblock gaps, (b) are delimited by an end-of-block signal, and (c) may contain one or more records. A block is usually subjected to some type of block processing, such as multidimensional parity checking, associated with it.

A block transfer attempt is a coordinated sequence of user and telecommunication system activities undertaken to effect transfer of an individual block from a source user to a destination user.

A block transfer attempt begins when the first bit of the block crosses the functional interface between the source user and the telecommunication system. A block transfer attempt ends either in "successful block transfer" or in "block transfer failure".

Successful block transfer is the transfer of a correct, nonduplicate, user information block between the source user and intended destination user. Successful block transfer occurs when the "last" bit of the transferred block crosses the functional interface between the telecommunications system and the intended destination user. Successful block transfer can only occur within a defined maximum block transfer time after initiation of a block transfer attempt.


*Federal Standard 1037C

Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Block — may refer to: * A way of controlling train movement in railway signalling * Postage stamp block, an attached group of postage stampsObjects* A large concrete or stone brick * Block (sailing), a single or multiple pulley used on sailboats *… …   Wikipedia

  • Telecommunications in Thailand — are based on an extensive network of telephone lines covering the country. TOT Public Company Limited and True Corporation operate the majority of the telephone network in the Bangkok metropolitan area while TOT Public Company Limited and TT T… …   Wikipedia

  • Telecommunications in East Timor — Telecommunications Democratic Republic of Timor Leste …   Wikipedia

  • block — A group of characters. For example, when downloading a program, blocks of 128 or 1024 characters are often sent …   Dictionary of telecommunications

  • Telecommunications Act of 1996 — The Telecommunications Act of 1996 [P.L. No. 104 104, 110 Stat. 56 (1996).] was the first major overhaul of United States telecommunications law in nearly 62 years, amending the Communications Act of 1934. It was approved by the 104th Congress on …   Wikipedia

  • Telecommunications rating — In telecommunications rating is the activity of determining the cost of a particular call. [ Carl Wright (2001) [ matters/newsletters/issue06.htm What is Rating? What is Billing?] , Rating Matters issue n. 6, 21… …   Wikipedia

  • Telecommunications facility — In telecommunication, the term facility has the following meanings: 1. A fixed, mobile, or transportable structure, including (a) all installed electrical and electronic wiring, cabling, and equipment and (b) all supporting structures, such as… …   Wikipedia

  • Jenner & Block — Infobox Law Firm firm name = Jenner Block LLP firm headquarters = Chicago, Illinois num offices = 3 num attorneys = approximately 500 num employees = practice areas = General practice key people = Anton Valukas, Chairman [… …   Wikipedia

  • Emirates Integrated Telecommunications Company — PJSC Type Private (DFM: DU) Industry Telecommunications Founded 2006 …   Wikipedia

  • Algorithme de block-matching — Un algorithme de block matching ((en) Block Matching Algorithm) est une méthode utilisée pour encoder le mouvement dans une séquence vidéo en localisant des blocs similaires entre deux images. En compression vidéo, plusieurs normes vidéo telles… …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”