Difference: 

1. A set-top box is a device that accepts external signal sources and inputs images, while a light cat is a device that converts analog signals into digital signals.

   2. The set-top box usually does not have WiFi function, while the optical modem has wireless network function, can set passwords, and can be used as a router. Precautions for using set-top boxes: 1. When the set-top box is in operation, it may generate heat, which is a normal phenomenon. If the temperature of the set-top box is too high, it is necessary to immediately shut down the equipment and contact after-sales maintenance.IPTV

   3.Do not use a damp cloth to wipe the set-top box directly. Before cleaning, turn off the set-top box and use a clean soft cloth to wipe it. There are many interfaces on the set-top box. If the interfaces are tight, do not disassemble the set-top box yourself. You can ask professional personnel to handle it. Material expansion: Optical modem, also known as single port optical transceiver, is a three piece set of fiber optic transmission equipment developed for special user environments. This device adopts a large-scale integrated chip, with a simple circuit, low power consumption, high reliability, and complete alarm status indication and network management functions.