Computer hardware and software for interconnecting, managing, securing and operating local and wide area networks and telephony systems; telephones, telephone headsets; electronic communication devices, namely, personal digital assistants, pagers, and cellular and wireless telephones; wireless communications devices, namely, wireless LAN hardware and software for the transmission of voice, data, and video; telecommunications equipment, namely, hardware and software for use in conjunction with managing and operating local and wide area networks; telephony systems, comprising gateways, switches, phones and other communication devices, namely, network access server hardware, LAN hardware, computer network adapters, computer network hubs, switches and routers, and bandwidth managers, namely, traffic shapers; call processing software for the transmission of data, video and voice traffic; storage networking products, namely, routers, switches, port adapters, and software used in the operation and management thereof; downloadable instructional materials, namely, books, manuals, printed guides for teachers, test booklets, magazines, newsletters and bulletins in the fields of network communications, and managing, operating and using local, wide and global networks