Customers can choose between waiting on hold in a queue or requesting a callback. When customers select callback, their place is held in the queue and their call is automatically returned when an agent is available to talk with them.
For the customer callback feature to work, at least one agent must be logged in and they must have a status of either Online or Away.
- If the caller doesn't enter a phone number, the caller number for callbacks is extracted from the username contained in the "from" SIP URI.
- Callbacks on SIP lines are dialed from the associated outbound number configured in the SIP line settings. If you don't associate an outbound number, callback will be unavailable.
Understanding the end-user experience
- Press 1 to request a callback to the number they called from.
- Press 2 to request a callback to a different number. The number must be in E.164 format [+ or 00][country code][subscriber number including area code]. If it's not in the correct format, the customer will be prompted to enter the number again.
- Press 3 to return to the queue and wait on hold.
If the customer requests a callback, they'll also hear a second Callback confirmation greeting confirming their choice. The call will then end while keeping the customer in the queue.
You can select a language for the callback confirmation greetings when setting up callback, see Turning on callback.
Understanding the agent experience
Agents click Call to call the customer back or Decline from the call console to send the call back to the queue.

- If an agent accepts the call, a ticket is created with an internal comment indicating that the callback request was attempted. If the customer doesn't answer, the call times out or the agent may leave voicemail, if available. No automatic redial is attempted.
- If all agents decline the call, the callback request is canceled and a ticket with the subject Callback is created for an agent to action later.
- If, after 60 minutes, no agents are available the callback request is canceled and a ticket is created.
Take into consideration how the callback request handles agents in unavailable statuses:
- If an agent is Offline or in Transfers only, they're treated as if they declined the request.
- If an agent is Away or busy on a call, they'll receive the request if they become available within the 60 minute window and no other agent accepts the callback request.
Reporting on callback activity
Use the Talk dashboard to analyze your account's callback from queue activity using the metrics Callbacks in queue, Total callback calls, and Average callback wait time. For more details, see Analyzing call activity with the Talk dashboard and Zendesk Talk dashboard metrics reference.
Turning on callback
Callback is configured for each individual phone number. You can't configure callback for digital lines.
To turn on callback
- In Admin Center, click
Channels in the sidebar, then select Talk and email > Talk. - Select the Lines tab.
- Click the number you want to edit.
- Select the Callback tab.
- Click the Callback? toggle to turn on callback.

- In the Language field, select a language for your callback phone number
confirmation greeting. This setting affects only the message that plays after customers
have pressed 2 to request a callback. It doesn't affect the language of the Callback
greeting or Callback confirmation greeting.Note: If you do not select a language, your Zendesk default language is used. If your default language is set to a language not included for voice, the greeting will be played in English.
- In the Callback greeting field, select a greeting from the dropdown list. This is the greeting that plays informing callers that they can press 2 to request a callback.
- In the Callback confirmation greeting field, select a greeting from the dropdown list. This is the greeting that plays after callers press 1 to confirm they've selected callback.
- Click Save changes.