Cloud Connector's work in concert with our Cloud services. They assist the Hosted Hello Hub (Cloud) to manage your local auto-configurable phones. Common usage is a customer with multiple locations with several phones at each, the Cloud Connector enables the Cloud Server to manage and auto-configure those phones at each location.
These are optional, as you can manually configure phones for remote locations, but save a lot of time and running around from location to location configuring phones manually.