Patent ID: 9215253
Filing Date: 2015-12-15
Classification: H04L,H04M,H04W

Abstract:
1. A method carried out by a communication device, wherein the communication device normally disregards incoming Real-time Transport Protocol (RTP) media if the communication device has not engaged in session setup signaling to set up a session in which to receive the RTP media, the method comprising: receiving, by the communication device, a Session Initiation Protocol (SIP) INVITE message from a calling party seeking setup of a call between the calling party and the communication device, and engaging, by the communication device, in responsive SIP communication with the calling party so as to then complete setup of the call; making a determination, by the communication device, of whether the communication device receives from the calling party a Real-time Transport Protocol (RTP) call announcement media stream for the call; if the determination is that the communication device receives from the calling party an RTP call announcement media stream for the call, then playing out, by the communication device, the RTP call announcement media stream as a call announcement to a user of the communication device without the communication device having engaged in session setup signaling to set up a session in which to receive the RTP call announcement media stream, including without having yet transmitted to the calling party a response to the SIP INVITE message; and if the determination is that the communication device does not receive from the calling party an RTP call announcement media stream for the call, then playing out, by the communication device, a default call announcement to the user of the communication device.