Customers that have active, in-service Products can review details about them using the Products Subscribed API. Subscribed products will reflect active services that have been previously ordered (whether ordered via the GSC APIs or other processes). As ordered products go into service, they are delivered via connections. Connections route traffic between networks and can be used to specify routing preferences or for numbers to use specific trunks. Connection identifiers are relevant when buying more numbers since an Order can include a connectionId that tells TCL to use a specific connection/route when putting new numbers into service.