Modems connected through telephone lines or copper lines allow for long distance communication between two devices. The DSL modem is a router for access to remote locations through a telephone line in harsh environments. The Leased-Line and dial up modems are Voiceband Modems which are used on leased telephone lines, dial up networks and even dry copper lines. Ideal for industrial applications with SCADA protocols like Modbus RTU and TCP, DNP and more.

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