California’s MetroLink ® Upgrades with JumboSwitch ® Case Study network build-out costs, training, certifications and maintenance. It also met Metrolink’s environmental requirements for a ruggedized switch that would withstand temperatures up to +80oC. Because the JumboSwitch’s TDM over IP capabilities, it was able to connect remote Control Points to radio towers with Analog/Dry Contact interface cards. JumboSwitch telephone and T1 cards are available for future needs and expansion. Metrolink’s network now features 67 communication shelters and Control Points, each one consisting of a JumboSwitch and SONET node, MPLS connection T1, Router at the Shelters. The JumboSwitch installation is running smoothly and Metrolink plans to employ it in additional rail line locations movi

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