A system D interfaces with a multiplicity of individual terminals T1-Tn of a telephone network facility C, at the terminals callers are prompted by voice-generated instructions to provide digital data that is identified for positive association with a caller and is stored for processing. The caller's...http://www.google.com.hk/patents/US5561707?utm_source=gb-gplus-share專利 US5561707 - Telephonic-interface statistical analysis system
