What Is a Callback Queue (Virtual Hold)?

Few things frustrate callers more than waiting on hold, listening to the same music and messages while wondering how much longer it will take. Callback queues, also known as virtual hold, offer an alternative: instead of waiting on the line, callers can hang up and receive a call back when it's their turn.

The Definition

A callback queue is a phone system feature that lets callers request a call back instead of waiting on hold, while keeping their place in the queue.

The term virtual hold reflects the idea that the caller is still "on hold" in the queue, just not physically on the line.

How It Works

A typical callback works like this:

1. A customer calls and joins the queue.
2. If the wait is long, the system offers a callback, often stating the estimated wait time.
3. The customer accepts and confirms the number to call back, often the number they're calling from.
4. The customer hangs up and goes about their day.
5. The system keeps their place in the queue.
6. When their turn approaches, the system calls them back.
7. The customer answers and is connected to an agent.

Types of Callbacks

Queue-based callback ("as soon as possible")

The customer keeps their place in the queue and receives a call when it's their turn. This is the most common type of virtual hold.

Scheduled callback

The customer chooses a specific time to be called back, such as later that afternoon or the next morning. This suits customers who are busy or calling at a bad time.

Web or app callback

Customers request a callback through a website or app without calling first, entering their number and, sometimes, the reason for their call.

Agent-First vs Customer-First

There are two common approaches to making the callback:

Customer-first. The system calls the customer first, and once they answer, connects them to an agent. This avoids agents waiting on unanswered calls, but the customer may wait briefly for an agent after answering.

Agent-first. The system connects an available agent first, then calls the customer. The customer is connected to a person immediately, but agent time is used while the phone rings.

Each approach has trade-offs, and businesses choose based on their priorities.

The Benefits

For customers

• No time wasted on hold.
• Freedom to carry on with their day.
• Less frustration, and often a better mood when the conversation starts.
• Choice, especially with scheduled callbacks.

For businesses

• Fewer abandoned calls, since customers don't give up waiting.
• Smoother demand, as callbacks can be spread across quieter periods.
• Lower call costs, particularly for toll-free numbers, since customers aren't held on the line.
• More positive conversations, since customers haven't spent a long time waiting.
• Better customer satisfaction.

Making Callbacks Work Well

Give accurate wait estimates

Customers need a realistic idea of when to expect the call. Underestimating leads to frustration.

Call back when promised

A callback that arrives much later than expected, or not at all, damages trust more than a long hold would.

Use a recognizable number

Many people don't answer unknown numbers. Calling back from the business's main number, or telling customers which number will appear, increases the chance they'll answer.

Confirm the right number

Let customers confirm or enter the best number to reach them.

Plan for missed callbacks

Decide how many attempts to make if the customer doesn't answer, how far apart, and whether to leave a voicemail explaining what happened and how to get back in touch.

Introduce the call clearly

When the customer answers, a short message or greeting should explain that this is the callback they requested, so they don't mistake it for an unrelated call.

Keep context

If the customer explained their reason for calling, or entered details in the phone menu, that information should be available to the agent who handles the callback.

Offer it at the right time

Callbacks are most useful when waits are long. Offering them when waits are short may simply add unnecessary steps.

Common Pitfalls

• Inaccurate wait estimates.
• Callbacks that never come.
• Calling from unrecognized numbers that customers ignore.
• Losing customer context between the request and the callback.
• Too many callbacks scheduled for the same time, creating a new backlog.

Respecting the Customer's Time

Callback queues are a simple idea with a big impact. Instead of making customers wait on the line, they let customers get on with their day while keeping their place. For businesses, they reduce abandoned calls and lead to more positive conversations. Done well, with accurate estimates, reliable callbacks, and context carried through, virtual hold shows customers that their time is valued, which is often the best possible start to any call.

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