A system is for providing communication between a caller and a special number call answering facility including call answering positions. Calls are in a first call format including caller identification information or a second call format without identification information. The system includes: (a) A...http://www.google.com.tw/patents/US6744859?utm_source=gb-gplus-share專利 US6744859 - System and apparatus for providing telephone communication between a caller and a special number call answering facility
