Cabinets on a pole, in a plant room or beside a highway are not office conditions. These switches are built for wide temperature range, DIN-rail mounting, redundant DC input and the electrical noise that comes with motors and contactors.
Check three numbers before anything else: operating temperature, ingress protection of the enclosure, and EMC class. A unit rated for -40 to 75 °C with fanless cooling survives a roadside cabinet in summer; a commercial switch in the same box does not.
Dual DC inputs with reverse-polarity protection keep the camera group alive when one supply fails, and a relay alarm output reports the failure to the control room instead of waiting for a customer complaint.
See RIS1000-16G-2F for a 16-port DIN-rail unit and RS1004K-2S-I where fibre drops are part of the design.