network. On one side, it connects to the traditional voice world, and on another side to packet-based devices. The gatekeeper is not a required device in an H.323 network, but if present, it must perform a set of functions. Gatekeepers provide address translation (routing) for devices in their zone. This could be, for instance, the translation between internal and external numbering systems. Another important function for gatekeepers is providing admission control, 56k dialup, , NY dialup 56k dialup, 56k New York, 56k dialup
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