Abstract: A packet switched communication system providing DPNSS standard voice and signaling data over IP, comprising connection services software for mapping IP addresses and port numbers to thirty IP trunks, wherein each of the IP addresses is used by a network layer of the DPNSS standard to route packets to a predetermined terminating node and each of the port numbers is used by a link layer of the DPNSS standard to deliver signaling data to a predetermined port within the terminating node. A far end message interface thread is provided for placing the signaling data and a Link Access Protocol (LAP) number into a data portion of each IP packet to permit reassociation of the signaling data at the terminating node to an associated one of the IP trunks.

Abstract: A system for providing a secure interface to a PBX system comprising a PBX having a command executor; a plurality of telephony devices connected to the PBX; one or more programmable computing devices connected to the PBX; wherein each programmable computing device has a telephony service provider component which communicates with the PBX command executor through a PBX command interface resident on the programmable computing device to request and obtain a list of telephony device identifiers corresponding to a set of telephony devices which are permitted to be monitored or controlled by the programmable computing device.