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Polycom CMA System Operations Guide
396 Polycom, Inc.
Alternate Gatekeeper
Within the CMA system, you can designate an alternate gatekeeper. In this
case, when an endpoint or other device registers with the CMA system
gatekeeper, the system sends back the alternate gatekeeper information to the
endpoint. Then, if communication with the CMA system fails, the endpoint
will attempt to register with the alternate gatekeeper.
In a redundant configuration, the alternate gatekeeper is the third gatekeeper
in line after the primary and redundant CMA system gatekeepers.
Neighboring Gatekeeper
Neighboring gatekeepers are gatekeepers that manage other H.323 regions
within an enterprise. When a call originates within one gatekeeper region but
that region’s gatekeeper is unable to resolve the dialed address, it is forwarded
to the neighboring gatekeepers for resolution.
Within the CMA system, you can also set up a dial rule that will route calls
with designated prefixes to designated neighboring gatekeepers.
Device Registration
The CMA system manages device registration and offers several choices from
an open registration policy to more restrictive registration policies.
No matter what the gatekeeper registration policy, any endpoint that is
automatically provisioned, any endpoint that is registered with the Global
Address Book, and any endpoint that is added manually to the CMA system
can automatically register with the gatekeeper.
The CMA system gatekeeper registration policies include:
Allow Registration of All Endpoints
This open Allow Registration of All Endpoints registration policy allows any
device that can find the CMA system gatekeeper to register with it. This is the
default policy.
In this case, devices can register to the CMA system automatically:
• When the device broadcasts a message to find a gatekeeper with which to
register. In this case, specifying a default gatekeeper is important, because
devices that register automatically may find multiple gatekeepers.
Note
A neighboring gatekeeper may require additional configuration to completely
integrate with the CMA system gatekeeper. Also, not all CMA system parameters
correspond to parameters on a neighboring gatekeeper.