Importance

Loading Importance Indicators...

Abstract

A secure method of accessing a computer facility is provided within the data communications equipment (DCE), e.g., a modem or a terminal server, by the use of Calling Party Directory Number (CPDN). In particular, a telephone line from the local public switched telephone network is configured to provide CPDN information. This telephone line terminates in the DCE, which stores a plurality of lists, each list comprising a plurality of CPDN numbers. Upon receiving a telephone call from a calling party, the DCE takes one of three courses of action depending on the calling party's CPDN: 1) the DCE can answer the telephone call if the calling party's CPDN is on the 'caller pays' list; 2) the DCE can refuse to answer the telephone call and then return the telephone call if the CPDN is on the 'we pay' list; or 3) the DCE can simply not answer, or return, the telephone call if the calling party's CPDN is not found on any of the plurality of lists.

Loading the Abstract Image...

First Claim