The 24-button Non-backlit Digital STS Telephone ( Part # 3515-71 ) has 24 flexible, dual color LEDs that can be customized for each application.  When the flexible button are used as DSS buttons, station status can be seen in a single glance. When they are used as CO/PBX/Centrex buttons, line status is easily monitored. This integrated speakerphone offers call announce with hands-free intercom and a hot keypad that allows dialing while the phone is on-hook.  The three interactive soft keys provide additional feature functionality.