Unregistered Endpoints; Calling From An Unregistered Endpoint; Calling To An Unregistered Endpoint - TANDBERG Gatekeeper User Manual

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TANDBERG Gatekeeper User Manual

4 Unregistered Endpoints

Although most calls are made between endpoints registered with a Gatekeeper or Border

Controller, it is sometimes necessary to place a call to or from an unregistered endpoint.

An unregistered endpoint can call an endpoint registered with the Gatekeeper. If there are no

ﬁrewalls between the unregistered endpoint and the called endpoint, it is possible, though not

recommended to place the call by dialing the target endpoint's IP address. A better way of

placing the call from an unregistered endpoint is to pass the alias of the called endpoint to the

Gatekeeper. The Gatekeeper will then resolve the alias and place the call as normal.

Not all endpoints allow you to enter an alias and an IP address to which the call should be placed.

In that case you can simply place the call to the IP address of the Gatekeeper, with no alias

information. The Gatekeeper may be conﬁgured to associate all such anonymous calls with a

single destination alias. This is achieved with the command:

xConfiguration Gatekeeper Unregistered Caller Fallback:

Figure 7: Calling an unknown IP address

Calls can be placed to an unregistered endpoint by dialing its IP address or using an H.323 URI

if the DNS system has been appropriately conﬁgured.

If URI dialing is used, DNS is queried for a call signaling address and, if found, the call is placed

to that address. See section 7 for details of how to conﬁgure the Call Signalling SRV Record.

It is sometimes undesirable for a system to place a call to an IP address directly. Instead, you

may want a neighbor to place the call on behalf of the Gatekeeper. You can conﬁgure this on the

Gatekeeper using the command:

xConfiguration Gatekeeper CallsToUnknownIPAddresses:

or using the web page Gatekeeper Conﬁguration

Gatekeeper shown in ﬁgure 7

There are three possible settings:

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