Method for playing multimedia customized ringing signal and customized alerting tone, and application server

A method for playing a multimedia customized ringing signal, comprising:

• receiving, by an application server, an initial call request from a calling terminal;
• sending, by the application server, the initial call request to a called terminal, wherein the initial call request comprises session description protocol (SDP) information of the calling terminal;
• receiving, by the application server, a provisional response in response to the initial call request from the called terminal;
• determining, by the application server, customized ring signal media resource information after receiving the provisional response;
• sending, by the application server, a first media session update message to the called terminal, wherein the first media session update message comprises the customized ring signal media resource information;
• and
• receiving, by the application server, a first response from the called terminal, wherein the first response comprises a result of a customized ringing signal media resource negotiation between the application server and the called terminal.

An application server, wherein the application server comprises:

• a non-transitory computer-readable storage medium storing instructions;
• one or more processors in communication with the non-transitory computer-readable storage medium, and:
• a transceiver, wherein the transceiver is configured to:
• receive an initial call request from a calling terminal;
• send the initial call request to a called terminal, wherein the initial call request comprises session description protocol (SDP) information of the calling terminal;
• receive a provisional response in response to the initial call request from the called terminal;
• send a first media session update message to the called terminal, wherein the first media session update message comprises customized ring signal media resource information;
• and
• receive a first response from the called terminal, wherein the first response comprises a result of customized ringing signal media resource negotiation between the application server and the called terminal.