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You can use prefixes to balance the load between a number of IP VCRs by registering them with the same prefixes and
selecting the "deregister" options:
• the Play back prefix will be deregistered if the Deregister play back prefix when all play back ports are in use setting is
selected and all play back ports are in use
• the Point to point call incoming prefix for all folders will be deregistered as will the Prefix for IP VCR registrations (if
register as a service prefix is selected) if Deregister recording prefixes when all recording ports are in use is selected and all
recording ports are in use.
When deregistration occurs, the gatekeeper will chose another IP VCR which is registered with the same prefix when a
call comes in rather than rejecting it.
Configuration rules One folder's Point to point incoming prefix can be the same as another folder's followed by some more digits; in this case the
IP VCR will use the longest match to determine which folder to create a new point-to-point recording in. For example, if
one folder uses the prefix "123" and another uses "1234", then calls to "12345" and "12346" will use the folder that
registered "1234" and calls to "1235" and "1236" will use the folder associated with the prefix "123".
One folder's Point to point incoming prefix can be the same as a non-prefix ID; for example a recording can be registered as
"1234" in addition to this being a folder's Point to point incoming prefix. In this case a call to "1234" will play back the
recording, and a call to a number that starts with "1234" but has more than 4 digits will trigger a new point-to-point
recording that will be stored in that folder.
A non-prefix ID can be the same as a folder's recording prefix plus some other digits. For example, you can have a
recording registered as "1234" as well as a point to point incoming prefix "123" for a folder - the IP VCR always matches
non-prefix IDs first; therefore a call to "1234" would go to the recording that had specifically registered this ID, whereas
a call to "1235" or "1236" would start a point to point recording.
The following are not allowed:
• 2 identical non-prefix numeric IDs: all recordings' numeric IDs, folders' auto attendant, recording IDs and
recording console IDs must be unique, and all must be different to the unit-wide H.323 ID
• 2 identical prefixes: all folders' Point to point incoming prefix must be unique and must all be different to the unit-
wide Play back prefix and Prefix for IP VCR registrations (if register as a service prefix is selected)