PMS 4 with Testaccess kit is a two-port, 10/100BASE-T Ethernet switch manufactured by Hirschmann. It has a red and black design and is UL, cUL, and CE certified. It features auto-sensing ports, port-based VLANS, port mirroring, and IEEE802.1x authentication. It also features a convenient testaccess kit for assisting in the troubleshooting and diagnosis of networks. The testaccess kit includes features such as Send & Receive Tests, Network Discovery Tests, Statistics Tests, Multicast Tests, and Port Duplex Tests.