Call setup simplification for internet clients to establish media sessions with a serving IMS network

A system comprising:

• one or more hardware processors;
• and
• a media proxy component configured to use the one or more hardware processors to perform operations comprising:
• establishing, based on an initiation of a call from a first internet client to a second internet client, a first media stream over an internet connection between the first internet client and the media proxy component;
• establishing a second media stream between the media proxy component and the second internet client;
• negotiating, in response to receiving a state change message from the second internet client, a modification to the second media stream without communicating the state change message to the first internet client, wherein the state change message comprises an update to the call that corresponds to a call transfer, a transition to or from music-while-ringing, a call hold or resume, or forking onto multiple devices;
• and
• connecting the call by connecting the first media stream and the second media stream.

One or more non-transitory computer storage media storing computer-useable instructions that, when used by one or more computing devices, cause the one or more computing devices to perform operations comprising:

• establishing, based on an initiation of a call from an originating device to a destination device, a first media stream between the originating device and an access node in communication with an internet protocol multimedia system (“IMS”);
• establishing a second media stream between the access node and the destination device through the IMS;
• negotiating through the IMS of the second media stream, in response to receiving a state change message from the destination device, a modification to the second media stream without communicating the state change message to the originating device, wherein the state change message comprises an update to the call that corresponds to a call transfer, a transition to or from music-while-ringing, a call hold or resume, or forking onto multiple devices;
• and
• connecting, by the access node, the call by connecting the first media stream and the second media stream.