SOFTWARE ARCHITECTURE.

Abstract

Early SPC switching systems were constrained because of the need to be cost competitive with electromechanical systems. This meant that expensive processor and memory capacity had to be conserved, thus affecting the important advantages of adaptability and evolution to accept new technologies. Now the rapidly reducing cost of microprocessors and memory has freed system designers from these constraints. The ITT 1240 exchange design takes full advantage of this new freedom to provide a flexible software architecture based on fully distributed control that will still be valid well into the next century. As a result, this new digital exchange is economical up to hundreds of thousands of lines.