Wired Additional Telephone Grothe HT 1730/2 – additional handset for wired intercom systems

Grothe HT 1730/2 is a wired additional telephone handset designed for use with compatible Grothe intercom and door entry systems. The unit is intended to extend internal voice communication points within a building, allowing occupants to answer and converse with visitors at the entrance from an extra room. The handset connects via a wired interface to the base intercom system and provides a straightforward solution for adding an internal extension without changing the existing door station or central unit.

Advantages

The additional handset offers a compact and reliable wired connection for clear voice transmission and simple operation. Its design focuses on functional compatibility with Grothe systems and ease of installation, reducing the need for complex wiring changes. The handset provides a consistent audio path and convenient internal placement for improved access to intercom functions across multiple rooms.

Suitable for

• Homes where an extra indoor handset is needed for answering the entrance intercom
• Small offices and retail premises requiring an additional internal communication point
• Multi-room apartments to place an alternative listening/answering position
• Renovation projects where adding a secondary handset is preferred over replacing the main system

Key specifications

• Connection type: wired interface compatible with Grothe intercom systems
• Function: additional indoor telephone handset for voice communication with entrance units
• Form factor: wall-mountable/desk placement depending on installation
• Audio: voice-only communication optimized for intelligibility
• Controls: basic call/answer operation and handset cradle
• Power: supplied through the intercom system wiring (no separate mains adapter required)

How to use

Install the Grothe HT 1730/2 by connecting it to the compatible intercom system following the manufacturer’s wiring diagram for additional handsets. Mount the unit on a suitable wall or place it on a desk where the cable reaches the system connection point. Once connected, use the handset to answer calls from the door station and speak with visitors; the device operates as an extension of the main intercom, with simple call/answer handling via the handset cradle and controls. If the system includes call transfer or multiple extension features, follow the main unit’s instructions to enable those functions for the additional handset.

Usage recommendations

The handset is intended for indoor use only; avoid exposure to moisture or direct sunlight. For reliable operation, use compatible Grothe intercom equipment and check wiring connections during installation. If unsure about wiring or compatibility, consult a qualified installer or refer to the main intercom system documentation.