40 66 00 Network and Communication Equipment
40 66 63 Antennas
40 66 13 Switches and Routers 40 66 16 Firewall Hardware 40 66 19 Media Converters 40 66 23 Frame Relay Equipment 40 66 26 Device Network Equipment 40 66 33 Metallic and Fiber-Optic Communication Cabling and Connectors 40 66 36 Process Instrumentation Networks 40 66 43 Wireless Network Systems 40 66 53 Multiple Address Radio Equipment 40 66 56 Point-to-Point Radio Equipment 40 66 63 Antennas 40 66 66 Monopoles and Towers 40 66 73 Satellite Communication Equipment