Light Rail System Upgrades Signaling & Communication Network With JumboSwitch ® Multi-Service Ethernet Platform Case Study The new communications platform also needed to support Genisys Controller legacy signals for track circuits and TWC 485 computers with RS232 interfaces for additional train controls. Solution An initial proposal calling for point-to- point Ethernet Switches and Serial Servers was soon discarded because of several important limitations including: 1) it didn’t support handshaking signals; 2) it didn’t offer redundancy; and, 3) it offered minimal flexibility for long term growth. To preserve overall network interoperability and upgrade to a packet-based communications system, the Metro opted to go with TC Communication’s JumboSwitch Multi- Service Ethernet

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