This is a generally available preview release, know as Preview Release 20, includes build 1.5.7.114 of Dispatch.
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A feature is designed to enable the control of a Traffic Signal. To enable this feature, supply install or attach (USB) a digital I/O device from SeaLevel, specifically any device which uses the SeaIO control library. The software has been tested with the SeaLINK PLC-16 (Model 8206). Please call for more details if you intend to use this feature.