1. A communication system to handle a plurality of calls comprising: a plurality of call processors that process signaling messages for the calls, and in response, transfer control messages for the calls and transfer data messages for the calls; a plurality of interworking units that receive the control messages and user communications for the calls and interwork the user communications between a first communication format and a second communication format in response to the control messages; and a control system that receives and processes the data messages for the calls to maintain an active call database having call data for active ones of the calls, wherein the control system receives a query, and in response, processes the active call database to identify one of the active calls that satisfies the query.