Callback Extensions
| Name | Default value | Description |
| Extension | Extension | |
| Description | Extension description | |
| Ringer time (sec) | 90 | Amount of time phone will ring before directing the call to the forwarding destination. |
| Forwarding destination (no answer) | Destination where the caller will be directed when ringing times out. | |
| Callback callee | Destination where Brekeke PBX will direct the caller when he/she disconnects a call before ringer time out. |