Block (telecommunications)
Encyclopedia
In telecommunications a block is one of:
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.
- A group of bits or digits that is transmitted as a unit and that may be encoded for errorErrorThe word error entails different meanings and usages relative to how it is conceptually applied. The concrete meaning of the Latin word "error" is "wandering" or "straying". Unlike an illusion, an error or a mistake can sometimes be dispelled through knowledge...
-control purposes. - A stringString (computer science)In formal languages, which are used in mathematical logic and theoretical computer science, a string is a finite sequence of symbols that are chosen from a set or alphabet....
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 parityParity bitA parity bit is a bit that is added to ensure that the number of bits with the value one in a set of bits is even or odd. Parity bits are used as the simplest form of error detecting code....
checking, associated with it.
A block transfer attempt is a coordinated sequence of user
User (telecommunications)
In telecommunications, a user is a person, organization, or other entity that employs the services provided by a telecommunication system, or by an information processing system, for transfer of information....
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
Bit
A bit is the basic unit of information in computing and telecommunications; it is the amount of information stored by a digital device or other physical system that exists in one of two possible distinct states...
of the block crosses the functional interface
Network interface
Network interface may refer to:* Network interface controller, the device a computer uses to connect to a computer network* Network interface device, a demarcation point for a telephone network...
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.