Sixnet Industrial VT-MODEM-1US Industrial Modem

VT-MODEM-1US is SIXNET's general‑purpose industrial telephone modem designed for rugged remote access to PLCs and serial devices over standard landlines. It is a single‑channel dial‑up modem that operates at up to 33.6 kbps and ships with the included VT-CABLE-MDM serial cable for direct connection to PLCs or serial hosts, along with the VT‑MODEM Setup Wizard for configuration. The unit is powered from 3 VDC at about 80 mA, built for industrial environments, and is part of the VT‑MODEM family; the VT-MODEM-1US is listed as discontinued by the manufacturer and replaced by VT-MODEM-1WW. It features Auto-Answer functionality and has historically been used to interface with PLCs such as Schneider Modicon 612/00 and Omron CX/C200HX, as documented in Sixnet VT‑MODEM technical notes and hardware guides describing it as the workhorse for general industrial applications.