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A Tlink group is a name you assign to one or more Tlinks. If you have more than one switch, you can use Tlink groups to control access to a specific set of Tlinks (or switch connections).
When you associate a device with a Tlink group, a user can issue call control requests only for the device on a Tlink in the Tlink group.
If you do not need to restrict access to a specific switch connection, you can assign the default Tlink group, Any, to all devices as you add them to the SDB.