Cord, 2520 Joules, Fax/Modem Protection, RJ11 Tripp Lite's SUPER7TEL15 surge suppressor offers complete AC and phone line surge suppression for comprehensive protection of workstations, desktop PCs, telecom systems and other sensitive electronics. Heavy grade AC surge suppression shields connected equipment from damage and performance problems due to transient surges. Set of RJ11 telephone line suppression jacks protect dialup and DSL modem lines, fax machines, cordless phones and more. SUPER7TEL15 offers 7 total outlets, extra-long 15 foot cord with space-saving angled plug and diagnostic LEDs to warn of wiring problems and suppressor damage. Heavy grade AC suppression rated at 2520 joules shields equipment from surges and line noise. Attractive white suppressor housing with keyhole mounting slots and 3 designated transformer plug outlets offers convenient protection of desktop computer equipment and accessories.