The LanMaster 35 is the ideal and universal tool for all IT administrators or system technicians who need to install and maintain VoIP devices and WLAN access points. In heterogeneous networks, Voice over IP (VoIP) phones and wireless access points are often powered via Power over Ethernet. There are many different standards, which can make interoperability challenging. The LanMaster 35 tests whether a link and the associated power supply are functioning correctly. When connected to the outlet, this easy-to-use handheld device quickly and reliably checks if there is a link of 10/100/1000 MBit/s Ethernet and what duplex mode is set. Additionally, the LanMaster 35 measures whether Power over Ethernet (PoE) is present at the corresponding port. The device not only identifies the voltage type as "Mid-Span," "End-Span," or "All-Span," but also determines which PoE standard is being used, such as IEEE 802.3af, Cisco standard, or a proprietary standard. During this measurement, the port is tested under load, thus displaying its functionality and settings.