: If your old system has a common ground for the lock and audio, terminal 6 may need a link to terminal 10. Testing the System :
The Urmet 1131 is a classic analog "4+n" wire door phone designed for high durability and simple audio communication. It is primarily used as an indoor apartment station to communicate with outdoor panels and control building access. 🛠️ Technical Specifications System Compatibility: 4+n wire analog systems (requires 5 wires). Call Type: urmet 1131 manual full
Installing the Urmét 1131 requires careful planning and attention to detail. The following steps outline the installation process: : If your old system has a common