Method and system for rejecting incoming call of secondary line in telecommunication terminal device supported multiple USIM, and telecommunication terminal device therefor

摘要

The present invention relates to a method and system for rejecting an incoming call on an auxiliary line of a communication terminal supporting a plurality of USIMs and a communication terminal therefor, wherein the method for rejecting an incoming call on an auxiliary line of a communication terminal supporting a plurality of USIMs comprises a plurality of USIMs. The USIM (Primary USIM) used as the main line and the USIM (Second USIM) used as the secondary line are determined for the Secondary USIM, and when an incoming call is made to the Secondary USIM while the Primary USIM is busy, the network server registering an additional service subscription to the network server to respond to busy during a call to the calling terminal and send a missed call text (SMS) to the secondary USIM; and when an incoming call is received to the Secondary USIM while the Primary USIM is on a call, the network server provides an additional service to the Secondary USIM. According to the present invention, when an incoming call is received on the secondary line, the network can give a response that the caller is busy (486 busy), thereby eliminating the need to wait until the call connection timeout. In addition, during a call on the main line, it is possible to notify whether a call is received on the secondary line by SMS after the call ends.