A call queue is what happens to a caller when every member of your team is already on a call. Instead of hearing an engaged tone or being dumped into voicemail, the caller is placed in a virtual waiting line — typically with hold music or a recorded message — and connected to the next available agent as soon as one becomes free.
For Australian small and medium businesses that receive more calls than they can immediately answer, a call queue is the difference between retaining that caller and losing them entirely. This guide explains exactly how call queues work, how they differ from call routing and hunt groups, what configuration options matter, and how to know whether your business actually needs one.
How a Call Queue Works
At its core, a call queue is a straightforward mechanism. Here is the sequence:
- A caller dials your business number.
- Your phone system's routing rules direct the call to the appropriate team or department.
- If an agent in that team is available, the call is connected immediately.
- If all agents are busy, the call enters the queue — a virtual waiting line held by your cloud PBX.
- The caller hears hold music or a recorded message. This may include their position in the queue ("You are number 3 in the queue") and an estimated wait time ("Your expected wait is approximately 4 minutes").
- When an agent finishes their current call, the phone system automatically connects the next caller in the queue.
- If the caller hangs up before being answered, the system registers an abandoned call and removes them from the queue.
- If the queue reaches its configured maximum depth — say, 10 callers waiting — any additional callers can be directed to voicemail, an overflow number, or an alternative message.
Nothing about this requires a caller to do anything other than wait. The entire process is managed by the phone system automatically.
Call Queue vs Call Routing vs Hunt Group
These three terms are often used interchangeably, but they describe different functions. Understanding the distinction helps you configure a phone system that actually fits how your business operates.
Call routing decides where an incoming call goes. Routing rules can direct calls based on the time of day, the number the caller dialled, the option they selected in an IVR menu, or their geographic location. Routing is the traffic director.
A hunt group decides which agent within a team answers the call. Hunt groups can ring agents sequentially (first available, starting from the top of the list), simultaneously (all phones ring at once), or in a round-robin rotation (distributing calls evenly across the team). A hunt group determines who picks up.
A call queue determines what happens when no one in the hunt group is available. If all agents are busy, the call queue holds the caller rather than sending them to voicemail or returning an engaged tone.
The three work together in sequence: routing sends the call to the right place, the hunt group attempts to connect to an available agent, and the queue holds the caller if the hunt group finds no one free. For more on how routing and hunt groups interact, see our guides on what is call routing and what is a hunt group.
Call Queue Configuration Options
Modern cloud PBX systems offer several configuration options that determine how your queue behaves. These settings have a direct impact on caller experience and your abandonment rate.
Hold Music vs Informational Messages
The most basic queue configuration is what callers hear while they wait. The options range from simple royalty-free hold music to fully branded recordings that include your business name, promotional messages, and instructions (for example, directing callers to your website for non-urgent enquiries). The most effective configurations combine music with periodic spoken messages so callers feel the queue is active and they have not been forgotten.
Queue Position Announcements
Position announcements tell the caller where they are in the line: "You are currently number 2 in the queue." This single feature measurably reduces abandonment. A caller who knows they are second in line will almost always wait. A caller who has been on hold for three minutes with no information has no idea whether they are next or tenth — and many will hang up.
Estimated Wait Time Announcements
A step beyond position announcements, estimated wait time announcements calculate an approximate hold duration based on average call handling time and current queue depth. The accuracy of these estimates depends on having sufficient call volume data. For businesses with consistent call patterns, wait time announcements are highly effective. For businesses with highly variable call lengths, they should be used carefully — an inaccurate estimate is worse than no estimate at all.
Maximum Queue Depth
Maximum queue depth sets a ceiling on how many callers can wait simultaneously. Once that ceiling is reached, additional callers are handled by overflow rules: they may be sent to voicemail, routed to a different number, or played a message explaining that all lines are busy and inviting them to call back. Setting maximum depth thoughtfully prevents callers from waiting indefinitely in a queue that has no realistic chance of answering them quickly.
Queue Timeout
Queue timeout sets an upper limit on how long any individual caller can wait before being redirected. If a caller has been in the queue for, say, eight minutes, the system can automatically route them to voicemail or an overflow number rather than leaving them waiting. Timeout rules work in combination with maximum depth to manage the caller experience during high-volume periods.
Callback Option
The callback option — sometimes called a virtual queue or queue callback — gives callers the choice to leave their number and receive a return call rather than holding. The system holds their place in the queue and calls them back when an agent becomes available. For businesses where calls represent significant revenue or service obligations, the callback option recovers callers who would otherwise abandon. It also reduces the staffing pressure of managing a live queue during peaks.
When a Call Queue Is Right for Your Business
Not every business needs a call queue. The following conditions indicate that a queue will deliver real value:
- You receive more than five inbound calls per hour during peak periods. Below this volume, a well-configured hunt group with overflow to voicemail is generally sufficient.
- You have at least two to three agents answering calls. Single-agent businesses benefit more from voicemail-to-email than from a queue, because a queue implies multiple agents who can take the next call.
- Your callers will wait rather than hang up. B2B professional services, medical practices, legal firms, utilities, and financial services typically have callers motivated enough to hold. Consumer retail and casual enquiries are far more likely to hang up.
- Losing a caller has a real revenue or service impact. If every missed call is a lost lead or a patient who goes elsewhere, the queue earns its place immediately.
When a Call Queue Is Not the Right Solution
A call queue is a tool, not a universal fix. There are situations where it will not help and may actually worsen caller experience:
- Very low call volume. If your team almost always answers immediately, overflow to voicemail is simpler and causes no caller friction.
- Caller populations who will not wait. If your customers are price-shopping consumers or casual enquirers, they will hang up and try a competitor before holding for more than 30 seconds. A queue will not retain them.
- Understaffed teams. A call queue with chronic wait times of five or more minutes is worse than a well-configured voicemail system with a clear callback commitment. A queue signals "someone will answer you soon." If that promise is regularly broken, it damages trust more than voicemail would.
If your business operates outside standard hours, you should also ensure that calls outside queue operating hours are handled correctly. See our guide on after-hours call routing for how to configure this alongside your queue.
Queue Abandonment: The Hidden Cost
An abandoned call is a call that enters the queue but hangs up before being answered. Abandonment is the most important metric for evaluating queue health, and it is consistently underestimated.
Industry benchmarks suggest that an abandonment rate above 10–15% for queued calls indicates a configuration problem — typically one or more of the following:
- The maximum queue depth is too generous, allowing wait times to stretch beyond what callers will accept.
- There are no position or wait time announcements, leaving callers with no information about how long they have been waiting or how much longer they should expect to wait.
- The queue timeout is too long, meaning callers are left holding when they should be redirected.
- There is no callback option, forcing callers to choose between a long wait and abandoning entirely.
A queue that tells a caller "your expected wait is 3 minutes" will retain far more callers than one that plays the same hold music on a loop without any information. If your abandonment rate is elevated, address these configuration points before adding more agents or expanding queue capacity.
For guidance on handling callers who cannot reach any agent — whether through a queue or otherwise — see our guide on call overflow and failover.
Call Queuing With Pickle
Pickle's cloud PBX includes call queuing as a standard feature of our business phone system. Configuration options include hold music, queue position announcements, maximum queue depth, queue timeout rules, and overflow routing.
There is no special hardware required — call queuing runs entirely in the cloud and works with desk phones, mobile apps, and softphones on any device your team uses. Setup is handled by our team, and changes to queue configuration can be made without calling a technician.
If you are evaluating whether a call queue is right for your business, or you want to review your current phone system setup, contact Pickle at 1300 688 588 or email [email protected].
Frequently Asked Questions
Q: How many callers can be in a queue at once?A: This depends on your queue's maximum depth setting, which is configurable. You might set a maximum of 5, 10, or more callers waiting simultaneously. Once the limit is reached, additional callers are handled by your overflow rules — sent to voicemail, a different number, or a recorded message.
Q: Can callers request a callback instead of waiting?A: Yes, if the callback option is enabled on your queue. When this feature is active, the system gives callers the option to enter their number and hang up. Their place in the queue is held, and the system calls them back when an agent becomes available.
Q: What do callers hear while they are in the queue?A: At minimum, callers hear hold music. More sophisticated configurations include branded recorded messages, periodic announcements of their position in the queue, and estimated wait time information. The content and frequency of these messages is configurable.
Q: Is a call queue the same as call waiting?A: No. Call waiting is a feature for individual phone lines — it alerts an agent who is already on a call that another call is incoming, and the agent decides whether to switch. A call queue is a system-level feature that holds multiple incoming callers in a virtual line and connects them automatically when an agent becomes free. They solve different problems.
Q: Do I need special hardware to enable a call queue?A: No. With a cloud PBX like Pickle's, call queuing is a software feature that runs in the cloud. It works with your existing desk phones, mobile devices, or computers running a softphone app. No additional hardware is required.