Tripp Lite 2 Network and Phone In-Line Surge Protector (DTEL2) POWERFUL NETWORK AND PHONE LINES: Surge suppressor is designed to protect data and communications equipment against AC transients caused by lightning, electrostatic discharge and ground surges that can enter equipment from the signal lines or chassis ground. TELEPHONE/ETHERNET LINE SURGE PROTECTION: The DTEL2 features RJ45/RJ11 plugs for modems, telephone lines and answering or fax machines. DATALINE SURGE PROTECTION: It protects up to 2 network or phone lines, modems, fax machines and answering machines against damage from lightning, electrostatic discharge and ground surges. Comes with RJ11 telephone patch cable. COMPREHENSIVE PROTECTION: Protects against the effects of electrostatic discharge, faulty wiring and lightning LIFETIME LIMITED WARRANTY: This In-Line Surge Protector offers a Lifetime Limited Warranty.