> ## Documentation Index
> Fetch the complete documentation index at: https://help.avoca.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Set up arrival windows

> Create the arrival windows in ServiceTitan that Avoca offers customers when it books.

Arrival windows are the time slots you give customers, like 8 AM to 12 PM. When your team uses ServiceTitan availability, these are the slots Avoca offers. If there are none, there is nothing to offer.

## Create an arrival window

**1. Open Arrival Windows**

In ServiceTitan, go to **Settings → Operations → Arrival Windows**.

**2. Add a window**

Add the start and end time.

**3. Choose who it's for**

Pick the business units it applies to. Leave it open to apply it to every business unit.

**4. Save**

Repeat for each slot you offer.

Add windows for every business unit that takes bookings.

> [!WARNING]
>
> If you change or remove a window, the times your assistant can offer change right away. Make changes outside busy hours and test after.

## Turn arrival windows on

In ServiceTitan, go to **Settings → Operations → Job Booking** and turn on **Arrival Windows**. The option stays grayed out until at least one window exists.

## Test it

**1. Open Call Booking**

Pick a job type and business unit that have a window.

**2. Check the slots**

The slots you see should match your windows. Avoca starts from these slots, then applies your [booking windows](https://help.avoca.ai/responder/booking-windows.md), so check those if a slot is missing on a call.

## More options

> [accordion] What does Avoca check?
>
> During setup, **Arrival windows** counts the active windows in ServiceTitan. It fails if there are none.

> [accordion] Can I use different windows for different business units?
>
> Yes. Pick the business units on each window. A window with none picked is open to all of them.

> [accordion] I use custom arrival windows in Avoca instead
>
> That's a different setup. Avoca offers the windows you set and books the job unassigned. See [Set up Avoca](https://help.avoca.ai/getting-started/setup.md).