Gatekeeper is an administrational tool for H.232 multimedia networks. A single unit can control interactions for each zone, which comprises the terminals, MCU's and gateway within the frames of a particular domain. Gatekeeper is an optional element, but when it available, it becomes the central administrative entity.
Modern Digital Communications Inc., founded in 1999, is a service provider offering voice, fax, data, web hosting, domain registration and co-location services.