High-Bandwidth Network Solutions Support Multiple Onboard Systems


Onboard Ethernet Networks






Ukraine recently overhauled its rail infrastructure to replace old electric trains manufactured in the former Soviet Union with brand new trains. The new trains are to be equipped with all the latest in rail technology, including digital real-time passenger information, passenger address, CCTV, and passenger Wi-Fi systems. All of these systems rely on a reliable and high bandwidth network to operate, so they need the right high-performance mix of wired and wireless network solutions.

The Ukraine Railway used Moxa’s TN-5518 EN 50155 Ethernet switches and AWK-4121 wireless APs to create a Gigabit network backbone and Wi-Fi access. The wide -40 to 75°C operating temperature of the Moxa devices makes them ideal for withstanding the extreme environmental variations across the country.

System Requirements

  • High bandwidth communication for real-time video/audio transmission
  • Continuous system operations in an IP-based network
  • EN 50155 certified products for reliable operations on trains
  • Industrial-grade design to withstand extreme conditions

Moxa Solution

Moxa’s TN-5518 EN 50155 Ethernet switches were deployed to provide an IP-based network communication backbone. The Gigabit speed of this switch allow the backbone to support many different applications, such as video, LED display boards, broadcast audio, CCTV IP cameras, passenger information devices, and the public address system. AWK-4121 wireless APs are also connected to offer passenger Wi-Fi connections while travelling.

Two TN-5518 switches are installed on each car; eighteen switches throughout the entire train together form a Moxa Turbo Ring that features fast network recovery time of less than 20ms at a full load of 250 switches. This ensures a reliable network connection. TN-5518 switches also provide bypass relay functionality for high network availability. If one of the Ethernet switches fails due to power loss, its ports are bypassed with a relay circuit, and the transmission line will automatically interconnect to ensure continuous system operation.

In addition, both TN-5518** switches and AWK-4121 wireless APs are EN 50155 certified and support -40 to 75°C operating temperature, to guarantee reliable and stable operations in rolling stock environments.

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