Panasonic KXT7885 900MHz Multi-line Cordless Phone12 CO line capability WORKS ONLY WITH PANASONIC PBX SYSTEM 3 line, 16 character line LCD display Flexible keys that can be programmed to access central office, outside lines, or system functions li Message waiting indicator Vibrating or ringer signal WORKS ONLY WITH PANASONIC PBX SYSTEM. 12 CO line capability 3 line, 16 character line LCD display Flexible keys that can be programmed to access central office, outside lines, or system functions like