Concept

Traditional data communication systems communicate with each other over the PSTN on which analog signals are transmitted. As the Internet develops rapidly, IP-based communication systems have been widely developed and applied. Digital signals are transmitted on IP networks and terminals. A modem enables devices on an IP network to communicate with devices on a PTSN without changing deployment on the PTSN. A modem converts analog signals to digital signals, as well as digital signals to analog signals.

Many manufacturers produce different types of modems. These modems support the standard AT command set but differ in implementation and configuration commands, making it difficult for users to manage modems. To facilitate modem management, configure the modem function on the industrial switch router.