Many rail systems such as IP CCTV, signalling, power distribution and general data transfer use a high reliability redundant LAN topology based on an Ethernet backbone. Fibre-optic cabling is typically used as the physical media thanks to its electrical noise immunity and transmission distances up to 100km in a single span.
To build such a LAN, Industrial Ethernet switches must be installed at regular intervals into trackside enclosures, buildings and substations and fibre-optic cables spliced and terminated at each location.
Amplicon represent two of the world's most respected Industrial Ethernet switch manufacturers - Moxa and Garrettcom - partnerships that give us over a million different product permutations and a very high calibre portfolio of products that have been tried and tested on railways around the world.
Our vendor neutral position and team of networking experts allows us to offer the best solution at the best price with the approvals and credibility required for major trackside installations. Whether we employ the uniquely flexible 'Turbo Chain' redundancy protocol from Moxa or the patented 'IGMP-L2' multicast management protocol, often used in IP CCTV systems, from Garrettcom our experts will provide an ideal solution for your trackside data distribution system.
In some systems, it may be necessary to communicate beyond the trackside LAN infrastructure, perhaps to the train itself or to a remote LAN using the 3G cellular networks:
Train to Trackside
There are several methods of maintaining communications between a moving train and a stationary trackside environment. One of the possible options is to use the wired LAN backbone on the trackside to build a continuous Wireless LAN using Industrial wireless Access Points with rail approval. The AWK-5222 has EN50155 approval and has dual radios allowing communication on the 2.4GHz and 5GHz bands. This product also features the unique 'Turbo Roaming' protocol allowing a very fast hand-over from one Access Point to the next as the train progresses along the track.
Trackside to WAN
The default gateway from the trackside LAN will usually be at a central control room or similar where a WAN link will provide access to remote LANs or the internet as required.
In some instances a standalone route out of the network may be required through a cellular router using the 3G phone network. This may be as a backup or as part of an independent trackside system. VLANs can be used to secure the content of the communications and a secondary SIM card can be used to connect to an alternative network (eg. Vodafone) if the primary network is down or the cell is saturated. To learn more about Amplicon's cellular solutions, click here.
Whether your Trackside system requires a wired, wireless or cellular communications backbone, Amplicon can help. Call our technical sales team for more information.