The HT 1172/55 Signo from Grothe is a comfortable intercom phone specifically designed for BiBus technology. This intercom system offers a reliable and user-friendly solution for communication in residential buildings. With its reverse polarity protection and short-circuit safety features, it ensures high security and durability. The full-duplex voice transmission allows for clear communication, while the mute function minimizes disturbances. The Signo also provides six electronic ringtones with call differentiation, enabling individual customization for various floor buttons. The adjustable ringtone volume and mute function add extra comfort and flexibility for everyday use.

• Full-duplex voice transmission with mute function
• Six electronic ringtones with call differentiation
• Adjustable ringtone volume
• Reverse polarity protection and short-circuit safety.