The IG202T-R38, developed by Data Connect Enterprise, is an industrial-grade modem purpose-built for SCADA networks, power utilities, and industrial automation systems where reliable communication is critical. It supports asynchronous or transparent data transmission within the 300–3400 Hz voice band. At lower baud rates, the modem uses binary FSK modulation, ensuring strong immunity to noise and reliable long-distance communication. At higher baud rates it employs QAM with 4, 8, or 16 constellation points, supporting data rates up to 9600 bps.
The IG202T-R38, developed by Data Connect Enterprise, is an industrial-grade modem purpose-built for SCADA networks, power utilities, and industrial automation systems where reliable communication is critical. It supports asynchronous or transparent data transmission within the 300–3400 Hz voice band. At lower baud rates, the modem uses binary FSK modulation, ensuring strong immunity to noise and reliable long-distance communication. At higher baud rates it employs QAM with 4, 8, or 16 constellation points, supporting data rates up to 9600 bps.
The IG202T-R38 is compatible with a wide variety of communication standards, including CCITT V.29, R.38A/B, R.37, R.35, V.23, BELL 103/202, as well as Cegelec proprietary 600/1200Bd and 2400Bd modes. Leveraging a 32-bit Texas Instruments DSP, it offers high flexibility through programmable features. Configuration is performed via Hayes AT commands through the DIAG port, which also serves as the interface for firmware upgrades.
Operational flexibility is a key feature. In FSK mode, the modem can run half- or full-duplex, supporting both point-to-point and multipoint topologies. In V.29 mode, four-wire full- and half-duplex operation is supported. This makes the IG202T-R38 suitable for use over private or leased lines, radio links, or power line carrier (PLC) channels.
Hardware variants include a compact desktop version, a 1U rack (accommodating up to 3 modems), and a 3U rack (up to 14 modems). The front panel features status LEDs for power, TXD, RXD, RTS, CTS, DCD, along with RESET and SET buttons. On the rear panel, users have access to an RS-232C serial port, a DB15 analog line interface, and a DC power connector. Supported supply voltages are 12 V, 24 V, or 48 V DC, with maximum power consumption of 3 VA.
Interface options include RS-232C (for connecting to terminals or controllers), 2- or 4-wire analog line ports, fail relay outputs, and optional control pins for radio integration. The modem allows fine-tuned configuration of parameters such as transmit power level, RTS/CTS delay, impedance matching, duplex mode, and carrier control via AT commands.
The IG202T-R38 stands out with its comprehensive test and diagnostic functions. Internal tests validate DSP and codec functions; local tests generate 800 Hz signals or preconfigured channel tests; and remote tests allow loopback checks of distant modems across point-to-point or multipoint links. It can measure in-channel levels, monitor bit error rates (BER), and perform automatic loopback functions, significantly improving commissioning and maintenance.
Firmware upgrades are supported directly in the field. By connecting through the DIAG port with a bootloader adapter, firmware can be updated without powering off the modem, simplifying maintenance in critical environments.
Physically, the modem is compact in desktop form and rack-mountable in 19-inch frames for larger deployments. Safety is ensured by compliance with IEC 62368-1; a 1A fuse must be present in the power supply line. The modem is specified for operation below 40 °C ambient temperature, ensuring stability in industrial settings.
With its wide protocol compatibility, reliable performance, advanced diagnostics, flexible hardware configurations, and ease of management, the IG202T-R38 delivers a robust and long-term communication solution for SCADA and power utility networks.