The Grandstream IP PBX Appliance 6104 can bring enterprise-grade voice, video, data, and mobility to your St Louis business. It features a quick and easy setup and deployment. Unify your St Louis business's voive, video calling, data tools, and facility access management onto one common network. Manage your network remotely for ease of use. Features of the 6104 IP PBX appliance include gigebit network port, and can support up to 60 concurrent calls.