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Displaying the built-in gatekeeper registration list
Cisco TelePresence ISDN Gateway 2.1 Online help (Printable format) 44 of 135
Displaying the built-in gatekeeper registration
list
The Cisco TelePresence ISDN Gateway 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 ISDN Gateway can register with its own built-in gatekeeper. The ISDN Gateway then counts
as one registered device. See Configuring H.323 gatekeeper settings.
Configuring the built-in gatekeeper
To start the gatekeeper:
1. Go to Network > Services and select H.323 gatekeeper to open a port for the gatekeeper. (On
the ISDN Gateway, ports are not open by default for security reasons.)
2. 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 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