e to ask the PBX to return his or her call when the line is free.Praxon, Inc. develops and markets next-generation phone systems worldwide that combine voice, networking, messaging, and Internet access. Our emphasis is on combining all the communications capabilities needed by small and medium businesses into an integrated and easy-to-use platform.The per-user cost of the Praxon PDX is lower than that of similar, competing solutions, with full investment payback in typically one year....