How to Enable Callback on Unsuccessful Blind Transfer
3CX Phone System includes an automatic callback feature in Blind Transfer. If you perform a blind transfer and the recipient of the call is busy, then the call will automatically return back to you. This way you can inform the caller that the person they are trying to contact is busy and proceed to transfer to another destination.
Enabling the Callback Feature
To enable the callback feature, from the 3CX Admin Console, go to “System” > "Options" > “General” > “System Settings" section.
- Enable the option "Enable transfer back on busy".
- Set a timeout in seconds during which the caller will wait for the destination to answer before the call bounces back. For example 30 seconds.
- Click “Save” to apply.
Using the Callback Feature
- When you perform a blind transfer to an extension which is busy, the call returns back to you instead of following the forwarding rules of the extension.
- When an extension is configured to accept more than one call at the same time (under “Users” > “Edit user" > "Call Forwarding” > “General options" > "Accept multiple calls”, the call will not bounce back, but will instead be handled according to that extensions forwarding rules. If the recipient rejects the transferred call it will be directed to his/her voicemail.
See Also
Last Updated
This document was last updated on 2 June 2026