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protocol converter (PCC)

A protocol converter converts protocols between units that are not adapted to the protocol. The principle of the protocol converter can be illustrated using the example of the classic terminal control unit( cluster controller).

In this example, a protocol converter presents itself to the computer like a control unit, but on the other hand it offers the possibility of connecting less expensive monitors, terminals or personal computers(PCs). For the connected terminals, e.g. screens and printers, the protocol converter must perform the corresponding terminal functions.

Protocol converters can be software or hardware products, or any combination of the two. They can further be classified according to the function performed, e.g. the complexity of conversion or emulation in the interface converter, code converter, protocol converter and the emulators. The former work on the physical layer and adapt the standard V.24 interface to other designs such as current interfaces, V.35, V. 36 and X.21.

Code converters can, for example, convert ASCII to Extended Binary Coded Decimal Interchange Code( EBCDIC) or Baudot code to ASCII.

Protocol converter for E1-to-Ethernet, photo:

Protocol converter for E1-to-Ethernet, photo:

Protocol converters with higher complexity provide buffering of data streams to convert asynchronous strings into synchronous data streams; others are used for blocking, where single characters are combined into data blocks of 128, 256 or 1024, etc. characters are combined. Other protocol converter groups are for transmission protocol conversion, terminal emulation, logical control of sessions, and connection to public networks.

Englisch: protocol converter - PCC
Updated at: 23.01.2013
#Words: 235
Links: protocol, converter, terminal, control unit (CU), cluster controller (CC)
Translations: DE

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