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The IP VCR contains a built-in gatekeeper with which devices can register multiple IDs. IDs can be numbers, H.323 IDs
(e.g. Fredsendpoint) or prefixes.
Up to 25 devices can be registered without a feature key. Feature keys can be purchased to increase this number.
Note: The IP VCR can register with its own built-in gatekeeper. The IP VCR then counts as one registered device. See
Configuring gatekeeper settings.
Configuring the built-in gatekeeper
To start the gatekeeper, go to Network > Services and select the H.323 gatekeeper check box to open a port for the
gatekeeper. (On the IP VCR, ports are not open by default for security reasons.) Then go to Gatekeeper, select Enabled
in the Status field and click Apply changes. If you attempt to enable the built-in gatekeeper without opening the port, an
error message is displayed.
Configuring neighboring gatekeepers
You can optionally configure the built-in gatekeeper with up to two neighboring gatekeepers. This means that if the built-
in gatekeeper receives a request (known as an Admission Request or ARQ) to resolve an ID to an IP address and that ID is
not currently registered with it then it will forward that request to its neighbor gatekeeper(s), as a Location Request
(LRQ). The built-in gatekeeper will then use the information received from the neighbor(s) to reply to the original
request.
You can also configure the behavior of the built-in gatekeeper on receipt of LRQs from another gatekeeper. It can:
• send LRQs regarding unknown IDs to its neighbor(s)
• reply to LRQs from other gatekeepers
• accept LCFs (Locations Confirms) from non-neighboring gatekeepers
Refer to this table for assistance when configuring the built-in gatekeeper:
Field Field description Usage tips
Status Enables or disables the built-in
gatekeeper.
To use the built-in gatekeeper, you must enable it
here.
Neighbor gatekeeper 1
and 2
Enter the IP address(es), or hostname(s)
(or <host>:<port number> to specify a
port number on the neighboring
gatekeeper), of the neighboring
gatekeeper(s).
These are the gatekeepers to which the built-in
gatekeeper will send an LRQ if it has received an
ARQ to resolve an ID which it does not currently
have registered. The built-in gatekeeper will then
use the information received from the neighbor(s)
to reply to the original request.
Accept LRQs Configures the built-in gatekeeper to
reply to LRQs from other gatekeepers.
These requests can come from any gatekeeper
which has the IP VCR's built-in gatekeeper
configured as one of its neighbors.
Forward LRQs for Configures the built-in gatekeeper to Unless you have selected to Accept LRQs, you cannot