With the Automatic Callback feature, when you call an extension that is currently unavailable, a callback is automatically initiated as soon as the extension becomes available.
This feature supports the following call types:
Outgoing calls
Transfer calls
Conference calls
If any of the above calls fail because the extension is busy, unanswered, or unreachable, you can press the AutoCbck soft key from the phone screen. The phone monitors the status of the called extension. You will receive a callback when the extension is available.