Abstract
Speech recognition was used to automate directory assistance in a 6-month trial with Bell Canada's public customers. The bilingual application gave the caller a choice at the beginning of the dialog to continue in English or French. Over 89% of calls were either partially or fully automated. Customer and operator reactions to the system were positive. Bell-Northern Research's flexible vocabulary recognizer, using a vocabulary of 1,700 city names and synonyms, performed well under real world conditions. Economically significant operator work time savings were demonstrated.
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