Ethernet, MPLS and IP are changing the economics of data services delivery, bringing simplicity with lower cost to both carrier and enterprise users. Circuit emulation such as TDM over IP (TDMoIP®) pseudowire takes advantage of this infrastructure to help both carriers and enterprises reduce network expenses without compromising functionality or scope of services. RAD's circuit emulation offerings include the IPmux TDMoIP circuit emulation gateway product family. These circuit emulation products support connection of legacy PBXs, TDM telephony switches as well as X.25 or serial data connections over a packet-switched network.