Call Connection Method and Apparatus

Abstract

A call connection method and apparatus are provided, and are applied to a process of establishing a call between a calling side and a called side in a scenario in which a called terminal subscribes to a caller ring back tone business. The method includes: In a process of signaling interaction between a calling terminal and the called terminal, after an action of tapping answering by a user of the called terminal, if the called terminal has not received first ACK signaling replied by a network side (for example, an S-CSCF), but receives second INVITE signaling, in this case, the called terminal assumes that the network side has sent the first ACK signaling, and replies to the network side with second 200 OK (INVITE) signaling after receiving the second INVITE signaling. In comparison with a manner of replying 491 signaling in this case.

CPC Classifications