Tripp Lite's TE1200 UPS System provides line-interactive voltage regulation and long lasting battery support for mid-size business telephone systems, voicemail systems, personal computers and other communications, network and telecom applications. 1200VA power handling capacity and large capacity battery system maintains continuous operation through power interruptions with over 2 hours runtime for many 32 line phone systems and over 1 hour for larger systems up to 64 lines. Line interactive voltage regulation maintains normal 120 volt output levels during brownouts as low as 75 and overvoltages as high as 147, saving battery reserves for use only during complete power failures. Includes 6 outlets, diagnostic LEDs and a built-in serial port that works with PowerAlert Software and cabling to provide automatic unattended shutdown of network and PC applications.