Gatekeeper
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.
Greeting - the caller will hear a greeting during the call. The function can be met, when calling to different companies, in most cases after the greeting follows a request, to which department or person the call has to be directed to.
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