Method and apparatus for processing coded information received through a telephone line during the inter-ringing periods

摘要: A method for processing coded information received through a telephone line during the inter-ringing periods. calling party dials desired phone number and, once he recognizes signals indicating that ringing circuit has been established, pre-established code one or more of Once received, it is decoded and compared with codes stored in memory device. If coincidence determined, call validated via means. The called receives an indication originated by person who possession code, may elect to answer not call. answers call, loop closed conversation take place. Further features include provision second be sent closed, means liberating line, after certain time elapsed, when does answer.