Lamp: Application to switching-system development

Specific attempts have been made at Bell Laboratories to shorten development intervals, to improve the quality of system design, and to improve unit, manufacturing, and system testing by widespread application of the LAMP system during development of the 1A Processor and No. 4 Electronic Switching System. LAMP has played a major role in two areas of the design process — design verification and fault simulation. Although ten major digital subsystems of No. 4 ESS and the 1A Processor are now being simulated on the LAMP system, this paper describes the experience gained during development of two of the 1A Processor subsystems, central control and program/call store.