Traffic Service Position System No. 1B: Integration and System Testing

The first Traffic Service Position System No. IB (TSPS No. IB) was placed in service in Fresno, California, on November 20,1981. This newly installed TSPS brought modern Stored Program Control (SPC) operator services capabilities to telephone customers in Fresno and other San Joaquin Valley communities, and permitted Pacific Telephone to close the largest remaining Bell System Cordboard installation in the United States. Modern operator services1'2 are bringing convenience to telephone customers and increased efficiency and savings to Pacific Telephone. Placing the Fresno TSPS No. IB in service marked the conclusion of a major testing program that was vital to the delivery of a highquality system, capable of meeting all objectives.1 This was especially critical because of the planned, rapid conversion of existing TSPS No. 1 sites to TSPS No. IB. Furthermore, since TSPS No. IB is the first electronic Stored Program Control system to utilize an embedded 885 3B20 Duplex (3B20D) Processor and its Duplex Multi-Environment Real-Time (DMERT) operating system,3 confirmation of its capabilities was essential to the success of the TSPS No. IB program, as well as to other systems utilizing the 3B20D Processor. Following the successful introduction of TSPS No. IB in Fresno, a second new start TSPS No. IB was placed in service in San Antonio (Southwestern Bell Telephone) on January 30, 1982. Both the San Antonio and Fresno sites were instrumental in the overall test program. The first conversion of an existing in-service TSPS No.