| 摘要 |
PROBLEM TO BE SOLVED: To provide a mechanism that enables a user to know a recipient on an extension telephone side by storing information for identifying a caller as a call log without storing the telephone number of the caller in the extension telephone when making a call from the extension telephone to an external line telephone network, reduces the risk of a leak of customer information even when the extension telephone is lost, and enables a caller of the extension telephone to easily know a number identifying the caller even when he or she does not know the information for identifying the caller. SOLUTION: On receipt of an inquiry about a system number corresponding to a recipient number is received from an extension telephone number, a system number uniquely associated with the recipient number is retrieved from external line information data, and when it is not registered, a new system number uniquely corresponding to the recipient number is issued. COPYRIGHT: (C)2011,JPO&INPIT |
