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Checking Connections 415
Alternate
Gatekeepers
A zone can contain only one gatekeeper at a time, although multiple
distinct devices can provide the gatekeeper function in a zone. Multiple
devices that provide the RAS signaling function for the gatekeeper are
called alternate gatekeepers. Each alternate gatekeeper appears to each
endpoint as a distinct Gatekeeper.
To ensure system availability, redundancy, and scalability, the gatekeeper
can provide RAS signaling function by using multiple physical or logical
devices, referred to as alternate gatekeepers.
Checking
Connections
You can use connection checks to pre-qualify an installation and to help
localize connection problems. H.323 gateway installers can conduct
connection checks for:
■ Gateway Checks
■ Network Checks
Gateway Checks Gateway checks can verify that the NBX systems at each end of an H.323
connection are working properly.
Gateway Self-Check
A gateway self-check is simply an H.323 call that returns to the local
IP address (loopback test).
To perform a gateway loopback test:
1 Access a ConneXtions H.323 port from an NBX Business or Basic
Telephone by dialing an H.323 port line number or by using a dial plan
configured with a ConneXtions pool number.
You must have Super User Group CoS allowed to dial in to a line port
number directly.
2 Enter the IP address of the gateway.
3 Verify the connection. If you are using default settings, you are connected
to the Auto Attendant. If you are not using default settings, you may be
connected to a different extension number.