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The MCU 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.
: The MCU can register with its own built-in gatekeeper. The MCU then counts as one registered device. See
Configuring gatekeeper settings.
To start the gatekeeper, go to and select the H.323 gatekeeper check box to open a port for the
gatekeeper. (On the MCU, ports are not open by default for security reasons.) Then go to , select Enabled
in the Status field and click . If you attempt to enable the built-in gatekeeper without opening the port,
an error message is displayed.
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:
Enables or disables the built-in
gatekeeper.
To use the built-in gatekeeper, you must enable it
here.
Enter the IP address(es), or
hostname(s) (or <host>:<port
number> to specify a port other than
the default of 1719 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.
Configures the built-in gatekeeper to
reply to LRQs from other gatekeepers.
These requests can come from any gatekeeper
which has the MCU's built-in gatekeeper
configured as one of its neighbors.