Passenger safety and highly available connectivity are top priorities for onboard train networks. These networks allow rail operators to share real-time information between trains, OCC, and stations to provide immediate status updates and emergency controls.

In this application, the train has six carriages. The AWK series is used to provide Wi-Fi within the train. Each carriage is equipped with a VPort 15 IP surveillance camera, which is connected to the wireless network via an integrated Ethernet port. The AWK-3121, a single RF device, is used as a client to access the camera in the front and rear carriages. The AWK-5222, a dual RF device, is deployed in the four central carriages, and can be configured in AP-client connection mode. In this mode, the first RF provides an inter-carriage link or an AP mode, while the second RF provides a client mode to access the camera. One path uses 802.11b 2.4 GHz, and the other path uses 802.11a 5 GHz, to overcome RF interferences in challenging RF environments.

To maintain constant communications while in transit, the fourth carriage includes an extra 802.11n AWK-3131 that acts as a client and is linked via the AWK-5222's Ethernet port. The outdoor 802.11n AWK-4131 is set up as an AP outside the station. This IEEE802.11n architecture provides high bandwidths to ensure real time on train public address and video surveillance . Faster roaming ensures seamless train-to-ground connectivity while the AWK-3131 on the train is in motion. An onboard server that is linked via an EN50155 managed switch is located in the front carriage to handle all onboard traffic and data transfer between the trainand ground.

Onboard Client