Apparatus for and method of verifying service user's information

A method of verifying the information of a service user to be charged in a switching network having a switch system for setting a call requested by one terminal between other terminal and said one terminal and a data memory for retaining service user's information previously designated by a subscriber and information on a validity of said service user's information, the method comprising:

• checking whether or not said service user's information sent from said one terminal satisfies a formal condition in said switch system,
• collating said service user's information on the basis of said information retained by said data memory in said data memory when said service user's information satisfies said formal condition as a result of said checking,
• setting a call to be charged based on said information between said one terminal and said other terminal when recognizing that said service user's information is previously retained by said data memory and has a validity as a result of said collation,
• wherein said switch system permits setting of call to be charged based on said information on condition that said service user's information satisfies said formal condition in response to a request for setting the call produced within a predetermined time if a collating means of said data memory stops collating of said service user's information.

A method of verifying the information of a service user to be charged in a switching network having a switch system for setting a call requested by one terminal between other terminal and said one terminal and a data memory for retaining service user's information previously designated by a subscriber and information on a validity of said service user's information, the method comprising:

• checking whether or not said service user's information sent from said one terminal satisfies a formal condition in said switch system,
• collating said service user's information on the basis of said information retained by said data memory in said data memory when said service user's information satisfies said formal condition as a result of said checking,
• setting a call to be charged based on said information between said one terminal and said other terminal when recognizing that said service user's information is previously retained by said data memory and has a validity as a result of said collation,
• wherein setting a call to be charged based on said information in the order of arrival till a predetermined number is reached, is permitted on condition that said service user's information satisfies said formal condition in response to a request for setting said call when a collating means of said data memory stops collating of said service user's information.