Our Lift Alarm Board L1 is a professional emergency communication module designed for elevators. It supports both PSTN (analog telephone line) and 4G VoLTE with automatic fallback between the two, ensuring reliable emergency calling even if one network fails. The board integrates a speaker and microphone, eliminating the need for an external dialer. A single button press triggers an emergency call to up to five pre programmed numbers, with loop calling if the first number is busy. Additional features include incoming call firewall, auto answer option, voice prompts to guide users, and RS485 for device monitoring and configuration. The board also supports SMS based setup and has a micro SIM slot, SMA antenna interface, and wide power input (12 40V DC). A pure 4G version (L2) is also available. Etross accepts ODM/OEM projects, including second development based on customer requirements. The board complies with global lift safety standards and is suitable for new elevator installations or retrofitting existing systems.
