Abstract: A system for estimating call waiting time for a call in a queue takes into account multiple queues wherein agents are shared between queues, abandoned call history, and virtual and priority queues. The system in a preferred embodiment is a computer-telephony integration (CTI) software application adapted to execute on a CTI processor, which may be coupled to switching equipment at network level in a connection-oriented, switched telephony (COST) network or to a switch at call-center level, or both.

Abstract: An Internet Protocol Network Telephony (IPNT) system has Internet-connected managing computers at plural call centers connected to local agent stations at each call center. The managing computers are adapted to receive IPNT calls from clients at internal routing points. A router coupled to each of the managing computers at the call centers is adapted to execute routing rules to select agent stations for transferring calls received at the routing points, and the agent stations selected can be at any of the call centers involved. In one aspect the router, having selected an agent station at a call center remote from the call center where a call to be routed is first received, requests a routing point address at the remote call center, then transfers the call to that new routing point. The second call center then further routes the transferred call to the final agent station.

Abstract: A system for routing calls has a plurality of call centers and a central controller for managing activity of the plurality of call centers, including call loading. The central controller utilizes a method for managing loading based on estimates of loading for call centers in the system for which real time loading information is not available during certain time intervals. The method involves retrieving a previous status of the call center for which real time information is not available, and using that previous status to perform and estimate of current loading for management purposes.