Over-All Characteristics of a TASI System
James A. Fraser, Daniel Bullock, Nancy Long · Bell System Technical Journal · 1962
TASI (Time Assignment Speech Interpolation) has been in service on transatlantic submarine cable channels since mid-1960. Measurement of service quality on one TASI system (White Plains-London) indicates that system performance equals or exceeds the original engineering objectives in all but a few cases. Field modifications now being made should bring these exceptions into closer agreement with objectives. A companion paper4discusses in detail the design considerations for TASI speech detectors and describes subjective tests made to determine the maximum permissible loading of TASI circuits without impairment of service.