Messaging based signaling for communications sessions

A method of providing call signaling services to client devices comprising:

• transmitting a start channel message on a service topic from a first client device to a service instance;
• publishing from the service instance to a plurality of client devices a channel message including a channel topic, wherein the service instance subscribes to the service topic and a channel topic associated with the service instance, and wherein each of the client devices is subscribed to a corresponding client topic;
• establishing a communication channel between the plurality of client devices by transferring signaling information between the plurality of client devices and the service instance, wherein the transferring includes publishing signaling information to a channel topic and a plurality of client topics to establish the communication channel between the plurality of client devices;
• and
• communicating information between the plurality of client devices over a network via one or more from a group of a wired connection and a wireless connection by publishing information over the communication channel.