41 Training in the use of equipment and systems for data networking, exterior and interior telecommunications infrastructures, access control and video surveillance, audio-visual products, building automation, electronic safety and security, building management, and wireless technology; training services in the field of designing equipment and systems for data networking, exterior and interior telecommunications infrastructure, access control and video surveillance, audio-visual products, building automation, electronic safety and security, building management, and wireless technology; and low voltage and structural cabling systems, fiber jumpers, patch cords, harnesses, coaxial connections, transmission equipment, switches, power distribution units, patch panels, air conditioners, racks, frames, innerducts, raceways and runways for wire and cable