ModemTest is a software for testing dial-up modems and phone lines, regardless of the ISP. It detects data corruption and includes a modem speed test. It allows testing with one or two modems. Ideal for low-level testing.

One of the most significant benefits of ModemTest is its capability to be used for both internal and external modem testing, making it a go-to choice for computer repair centers as well. For home users, troubleshooting internet connection problems has never been easier. With simple processes of elimination, users can use ModemTest to pinpoint if their connection problems stem from a faulty modem, the phone line, or their ISP service.
What's more, ModemTest keeps a log of data corruption and incorporates a built-in modem speed test that reports the initial connection speed and actual throughput. The software provides two different test methods. The first involves using two telephone lines and two modems in a master/slave configuration. Once a successful connection is established, data packets are exchanged between the master and slave. The second test method requires only a single modem and no telephone line. Here, a local loop-back is done on the analog side of the modem, with ModemTest sending data packets that are then echoed back by the modem.
ModemTest communicates with the modem through a COM port, with the software allowing the sending of specific data files, which allows for compliance with specific standards such as ITU-T v.56. Additionally, before sending any data, ModemTest checks the settings on the serial port and modem itself, with any data received verified to ensure completeness and error-free transmission. The log of all activities is kept on the right-hand section of the window, with different types of activities highlighted in different colors. Any errors detected are displayed in red, and this log can be saved to disk if needed. In conclusion, ModemTest is an essential software for anyone who wants to test their modem accurately, log any data corruption, and receive alerts if there are any issues with their system.
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Version 1.3 build 1011: N/A