Patent ID: 9525766
Filing Date: 2016-12-20
CPC Classification: H04L,H04M,H04W

Claim Text:
1. A method for automatically switching voice call services, comprising: Initiating, by a calling terminal, a call aiming at a called terminal through a Public Land Mobile Network (PLMN), sending, by the calling terminal, an IP service query message containing identification information of the calling terminal and the called terminal to an Internet Protocol (IP) network service server; querying, by the IP network service server, states of the calling terminal and the called terminal, sending, by the IP network service server, a switching selection prompt message to the calling terminal and the called terminal to inquire whether the calling terminal and the called terminal switch the call through the PLMN to a call through an IP network when the states of the calling terminal and the called terminal meet a preset call switching condition; establishing, by the IP network service server, an IP network connection path between the calling terminal and the called terminal when the calling terminal and the called terminal both select to switch the call through the PLMN to the call through the IP network, notifying, by the IP network service server, the calling terminal and the called terminal of establishing the IP network connection path; breaking, by the calling terminal, a call connection with the PLMN after the notifying, and making, by the calling terminal, the call through the IP network with the called terminal by using the IP network connection path.