TSPS No. 1: System Testing

In a typical T S P S No. 1 installation, the Western Electric Company performs a series of installation tests which check out the equipment as received from the factory and the equipment interconnection cabling as installed in the field. Extensive use is made of manual buzz through testing and X - r a y programs. 1 Then system tests are conducted to demonstrate t h a t the system is complete and operable. Initially basic system functions related to handling a small call load are shaken down. Then all system features are tested in the presence of the call load background. Finally, continuous operation is imposed wherein the system is allowed to run under typical environmental conditions with call load boxes being used to simulate traffic. System performance during continuous operation must satisfy a set of performance criteria (described in Section I I I ) to be acceptable for turnover to the Bell System Operating Company. After turnover, operating company craftsmen tie the new system into the existing Bell System plant, determine t h a t connecting offices function smoothly with it, run it continuously in accordance with telephone company discipline, and for training purposes perform all routine functions. On completion, the system is cut over into service. T h e system tests applied at the first T S P S No. 1 installation at Morristown, N. J., were more exhaustive than would be used for sub2711