Traffic Service Position System No. 1B: Integration and system testing

The integration testing and system testing strategies used in the development of the Traffic Service Position System No. 1B (TSPS No. 1B) are described in this article. It discusses novel methods developed for the integration and testing of the first embedded application of the 3B20D Processor and DMERT operating system. The new testing techniques and project management aides, which were vital to the achievement of system quality for the Bell System service, are described. The first TSPS No. 1B went into service on November 20, 1981, in Fresno, California.