How do VoIP connections differ with and without gatekeeper?

d开发者_如何学编程ifference between voip with and without gatekeeper?

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A gatekeeper can be used when the VoIP endpoints (eg. phones) use the H.323 protocol.

When a gatekeeper is used the, the endpoints must register with the gatekeeper and will ask the gatekeeper permission for each call. This allowes the endpoints to dial by phone numbers and names rather than IPs. In addition the gatekeeper can provide services such as accounting and firewall traversal.

See the GNU Gatekeeper FAQ for more details.