Automatic Call-Back is a service that repeatedly redials a busy number for 30 minutes or until the call goes through. You will be notified by a special ring and can simply pick up the receiver to put the call through.
To Activate Automatic Call-Back:
Automatic Call-Back can monitor more than one busy number at a time, with distinctive rings used for each (Caller ID, if so equipped, also shows which number has been reached). If you hear a fast busy signal or an announcement that the call cannot be completed, then the number is either invalid/not working, or has activated Call Forwarding.
Automatic Call-Back deactivates automatically if you do not get through within 30 minutes. To deactivate Automatic Call-Back manually, listen for a dial tone and dial *86. Listen for the announcement.
*Certain phone features may not be available in your area depending upon the capabilities of the interconnecting providers.