ProtectNet^® is a collection of data line surge suppressors for comprehensive network and PC system protection. Data line surges make up an overwhelming majority of all surge induced damages where the equipment was thought to be already protected but had a back door such as a modem line unprotected. Network interface cards, in particular, can be destroyed by relatively mild spikes. PNET1 protects 100Base-T, 10Base-T and Token Ring network interface cards, hubs or LAN equipment.