System and method for connecting an endpoint to an active multimedia communications session on a data network by setting metadata associated with a telephone call

The present disclosure includes a system and method for connecting an endpoint, such as a client device, to an active multimedia communications session on one network using metadata included in a communication initiated on another network. In some embodiments, the initial network is the PSTN and the second network is the Internet. In some embodiments, the system includes a multimedia contact center on the second network and only a telephone call on the first network.