# Queue callback

> Let callers leave their number instead of waiting, and call them back when a user is free.

- URL: https://kb.voipcloud.online/au/pbx/mass-incoming-calls/queue-callback/
- Section: PBX › Handling mass incoming calls
- Type: reference
- Applies to: All countries
- PBX object: callback
- Last reviewed: 2026-11-09

**Queue callback** lets callers leave a phone number instead of waiting on hold. The system then rings your users; when one answers, it calls the customer back and connects them.

It's often connected to a [Queue](https://kb.voipcloud.online/au/pbx/mass-incoming-calls/queue/)'s **Exit code** or **Maximum waiting time exceeded** path, so callers who don't want to wait can ask for a callback.

## Add it to your call flow

1. Drag **Queue callback** from the **Handling mass incoming calls** group onto the canvas and click the gear icon.
2. Enter a **Name**, then click **Add** and choose the users who will make callbacks.
3. Choose the **Ring mode** and a **Callback caller ID**.
4. Click **Save**, connect the object that should offer callbacks, and click **Apply configuration**.

![Queue callback settings](https://kb.voipcloud.online/au/images/pbx/mass-incoming-calls/queue-callback-settings.webp)

## Settings

| Setting | What it does |
| --- | --- |
| Name | Label on the canvas. |
| Internal number | Users can dial or transfer calls to it. |
| Ring mode | **Ring all**: all users at once. **Linear**: one at a time, top to bottom. **Round-robin**: like **Linear**, starting from where it left off last time. **Least recent**: the last called user repeatedly until they answer, then the next user for the next call. |
| Ring time | How long each user rings. If a user's own ring time is shorter, their own setting is used. |
| Membership | Turn a user off to stop callbacks reaching them. |
| Maximum callback retry duration, minutes | How long the system keeps ringing users before giving up on a callback request, 1 to 480 minutes. |
| Callback caller ID | The number the customer sees when you call back. Only your purchased numbers (not toll-free or shared cost). With none, callbacks are anonymous. |
| Announcement to the user about a callback when answering a call | Tells the user it's a callback before connecting (**Default**, **Custom** or **Disabled**). |
| Allow users to accept or decline callbacks | Asks the user to accept or decline. A declined callback isn't retried; you can get an email when it happens. |
| Rest time for the user after ending a call, seconds | A short break before the next call, 0 to 300 seconds. If a user gets calls from several **Queue** and **Queue callback** objects, the value of the object whose call they answered last applies. |
| Enable email notification | Emails you when the maximum callback retry duration runs out, or when a user declines a callback (needs **Allow users to accept or decline callbacks**). |

## Related

- [Queue](https://kb.voipcloud.online/au/pbx/mass-incoming-calls/queue/)
- [Queue wallboard](https://kb.voipcloud.online/au/pbx/monitoring/queue-wallboard/)