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Grandstream UCM6204 Innovative IP PBX with 4 FXO and 2 FXS PortsThe UCM6200 series includes the same award-winning features as the UCM6100 series. Designed to provide a centralized solution for the communication needs of businesses, the UCM6200 series IP PBX appliance combines enterprise-grade voice, video, data, and mobility features in an easy-to..