| 摘要 |
A method of delivering a video ringback media stream to a first terminal includes transmitting a session signaling message from the first terminal to a ringback server, transmitting a session signaling response message from the ringback server to the first terminal, and establishing one or more channels between the ringback server and the first terminal. The method also includes establishing one or more media streams between a content device and the ringback server and processing the one or more media streams in the ringback server to form a video ringback media stream. The method further includes transmitting the video ringback media stream from the ringback server to the first terminal, transmitting a second session signaling message from the ringback server to a second terminal, and transmitting a second session signaling response message associated with answering a call from the second terminal to the ringback server. Transmitting the second session signaling response message is performed after transmitting a session signaling response message.
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