TSPS No. 1: Physical Design2688 and 2689

The Traffic Service Position System (TSPS) No. 1 (see Fig. 1, which shows a portion of a chief operator unit, Miami, Florida) utilizes modular design t h a t enables customers to order equipment orderly and economically as needed. Frames in modular multiples of 1 foot, 1 inch in length permit a highly standardized floor plan arrangement. This in turn makes possible a higher degree of connectorization. In TSPS close to 90,000 interframe and intraframe leads are connectorized in a maximum sized office. The TSPS development was undertaken with the intent to use as much "in production" apparatus, wired equipments and frameworks as possible. In addition to existing conventional electromechanical hardware, basic No. 1 ESS apparatus such as the semiconductor circuit packs and mountings, ferreed switches, ferrod sensors, bus transformers ancl terminal strips were used. Also adopted with minor modifications were power distributing, master scanners, signal distributor, central pulse distributor, tone and distributing frames, sheet metal frameworks, cable racks, fuse panels, filter units, and control panels. The adoption of this hardware offered considerable advantages: (i) reduced development effort, (u) immediate availability, [Hi) 2685