Meaning – The communication control unit, or the CCU refers to a communication device that controls transmission of data over lines in a network. This term was used in the 1980s to refer to devices that controlled the transmission and reception of data in computer networks. These devices included the likes of front-end processors for mainframes, to simple units such as concentrators, terminal servers, or multiplexers of various kinds for transmission of data primarily over dedicated lines.
Thanks to the advancements in technology, the conventional communication controllers have been replaced with communication adapters, which interface computers to the network, which serve to deliver data over the network from source to destination.
Example of usage – “In order to keep up with the times, the organisation had to upgrade all the communication control units employed by the company, with the more recent communication adapters.”