FELA presents the new emergency intercom HSS 2501 – developed according to RTE 40100:2024 to enhance safety in railway operations

With the HSS 2501, FELA Management AG is introducing a new generation of emergency intercom units, developed strictly in accordance with the current RTE 40100:2024 “Passenger Emergency Equipment” standard. The compact device combines modern communication technology, a robust construction and clearly defined safety-relevant processes — perfectly tailored to the demanding requirements of public transport environments.

Developed according to RTE 40100:2024 – for maximum safety

The functional and signalling processes of the HSS 2501 fully comply with the specifications of RTE 40100:2024. These include clearly structured emergency call sequences, defined status indicators and reliable hands-free communication with the control center or the train driver — essential for fast response times in critical situations.

Modern communication & intuitive operation

The intercom operates via VoIP (SIP call) over LAN and is powered via PoE+ (802.3at). A tactile illuminated SOS button and multiple RGB LEDs provide clear and easily recognisable visual feedback on the current operating state at all times.

Robust design for daily operation

The solid metal housing made from aluminum and steel offers reliable protection against mechanical impacts and environmental influences. Key technical features include:

  • Operating temperature range: –25°C to +55°C, short-term up to +70°C

  • IP34 protection rating

  • Maximum power consumption: 25.5 W

  • Galvanically isolated I/O interfaces for maximum operational safety

  • 5 RGB LEDs and an illuminated ring around the emergency call button

Compact and easy to install

With a front plate height of 190 mm and width of 130 mm, the HSS 2501 integrates seamlessly into both new and existing vehicle architectures. Front-side installation and six M4 threaded bolts on the rear ensure quick and secure mounting. The dimensional drawings and cut-out diagrams in the technical documentation support smooth system integration.

Service-friendly with web-based configuration

An integrated web interface enables efficient configuration and maintenance of the intercom — ideal for day-to-day operation and rapid adjustments.


With the HSS 2501, FELA sets new standards in safety, regulatory compliance and reliability in railway communication, providing operators with a modern, durable and intuitive solution for passenger emergency communication.

FELA presents the new emergency intercom HSS 2501 – developed according to RTE 40100:2024 to enhance safety in railway operations

FELA Management AG