A Processor Controlled Telephone Switching System--TXE4

Telephone subscribers require a service which is reliable and offers a wide range of facilities. System design is of vital importance in determining the ability of an administration to meet these requirements economically, and processor controlled exchanges can be designed to provide the necessary qualities of reliability and flexibility. This paper describes in outline the operation of the TXE4 system, and shows how it incorporates features which will enable an administration both to meet its present commitments and to look ahead to providing an enhanced service in the future.