System and method for establishing a communication session with an endpoint of a plurality of endpoints

A device, comprising:

• one or more memories;
• and
• one or more processors communicatively coupled to the one or more memories, to:
• receive, from a user device, a request to establish a voice call;
• determine that one of a plurality of endpoints is to be involved in the voice call with the user device;
• transmit send-only invites to the plurality of endpoints,
• wherein the send-only invites are associated with the request;
• receive, from a first endpoint of the plurality of endpoints, a receive-only response to a corresponding send-only invite, of the send-only invites, transmitted to the first endpoint,
• wherein the receive-only response identifies a selected communication protocol for the first endpoint to use during the voice call;
• transmit, to a second endpoint of the plurality of endpoints, a cancellation associated with a send-only invite transmitted to the second endpoint;
• transmit, after transmitting the cancellation, a send-receive invite to the first endpoint,
• wherein the send-receive invite identifies the selected communication protocol as a communication protocol for the voice call;
• and
• transmit a send-receive acceptance to the user device,
• wherein the send-receive acceptance identifies the communication protocol for the voice call;
• and
• establish the voice call between the user device and the first endpoint,
• wherein two-way audio for the voice call is established based on a send-receive response from the first endpoint and the user device receiving the send-receive acceptance.

A non-transitory computer-readable medium storing instructions, the instructions comprising:

• one or more instructions that, when executed by one or more processors, cause the one or more processors to:
• receive, from a user device, a request to establish a voice call;
• determine that one of a plurality of endpoints is to be involved in the voice call with the user device;
• transmit send-only invites to the plurality of endpoints,
• wherein the send-only invites are associated with the request;
• receive, from a first endpoint of the plurality of endpoints, a receive-only response,
• wherein the receive-only response identifies a selected communication protocol for the first endpoint to use during the voice call;
• transmit a send-receive invite to the first endpoint,
• wherein the send-receive invite is transmitted after cancelling corresponding send-only invites to one or more other endpoints of the plurality of endpoints, that are different from the first endpoint, and
• wherein the send-receive invite identifies the selected communication protocol as a communication protocol for the voice call;
• and
• transmit a send-receive acceptance to the user device,
• wherein the send-receive acceptance identifies the communication protocol for the voice call, and
• wherein, upon the user device receiving the send-receive acceptance, the voice call can be established between the user device and the first endpoint.