The RTS model KP-32 Classic keypanel fits in a standard 19 inch rack and is two rack spaces high. It has 32 lever keys: 30 keys are for intercom talk/listen assignment; one key is for call waiting response; and one key is for headset/microphone/program selection and volume setup. The KP-32 Classic combines all of the programmable features of the KP-12 keypanel. The KP-32 Classic features digital signal processing and binaural headset operation with left/right assignment of audio signals. It also has large, super-bright, long-life fluorescent displays with adjustable brightness control, making it suitable for all types of ambient lighting.