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Doorking Cellular Voice & Data Adapter Control Box | DKS-1800-080 liftmaster drive wheel Doorking 6500-381 Swing Gate OperatorDoorking Cellular Voice & Data Adapter Control Box DKS 1800 080 Save Money! DKS Cellular* control boxes provide an alternative to standard POTS (Plain Old Telephone Service) phone lines that are expensive to install and maintain and are becoming increasingly scarce and unreliable for data transfer via obsolete modem technology. The cellular control box eliminates the need for expensive long wire runs (trenching) that typically provide voice and data