How do I increase the number of concurrent lines?

Hi there! 👋 I can definitely help you with increasing the number of concurrent lines in Vapi. Concurrent lines in Vapi define the maximum number of simultaneous calls your account can handle. By default, you're limited to 10 concurrent calls (combining both inbound and outbound calls) on the Pay-As-You-Go plan. Here are several ways you can increase your concurrent lines: 1. Purchase additional concurrent lines through the Vapi dashboard: - Go to the Vapi Dashboard - Click on the green button with your organization name at the bottom left - Click on the billing option - Navigate to add-ons where you can purchase additional concurrency limits [According to Vapi documentation](https://docs.vapi.ai/billing/billing-limits) 2. Contact Vapi support for dynamic scaling if you're an Enterprise customer. They can set up a solution that scales dynamically with your usage patterns. 3. Upgrade to Vapi Enterprise for unlimited concurrency. The Enterprise plan can scale up to millions of concurrent calls. To get started with Vapi Enterprise, you can fill out the form at [book.vapi.ai](https://book.vapi.ai/). 4. Purchase a Twilio number directly and import it into Vapi. This allows you to run 10 concurrent outbound calls at once with no daily limit. Is there anything specific about these options you'd like me to explain further? Sources: - [Vapi Documentation Billing Limits](https://docs.vapi.ai/billing/billing-limits) - [Vapi Enterprise](https://docs.vapi.ai/enterprise) - [Book Vapi](https://book.vapi.ai/)

Hey ithaka to increase the concurrent lines, open the VAPI dashboard, and then go to the billing page , click on add-ons, and from there you can purchase more concurrent lines.

what does it mean, if you purchase 1 concurrency line?

Hi there! 👋 I don't have specific information about exactly how many additional concurrent calls you get when purchasing 1 concurrency line, but I can explain what purchasing a concurrency line means in Vapi. Purchasing a concurrency line in Vapi increases the total number of simultaneous calls your account can handle. By default, Vapi accounts have a concurrency limit of 10 simultaneous calls (combining both inbound and outbound calls). When you purchase additional concurrency lines, you're essentially increasing this limit to allow more calls to happen at the same time. According to the [Vapi documentation](https://docs.vapi.ai/billing/billing-limits), concurrency lines define the maximum number of simultaneous calls your account can handle. Without sufficient concurrency lines, when you reach your limit, additional calls will receive a busy signal or be dropped with an error message like "Over Concurrency Limit." You can check your current concurrency limits in your subscription details. The [Vapi changelog](https://docs.vapi.ai/changelog/2024/11/11) mentions that

Subscription.concurrencyLimit

shows both your included (default) and purchased limits, giving you the total number of concurrent calls you can make. Is there anything else you'd like to know about concurrency lines or other aspects of Vapi? Sources: - [Vapi Documentation Billing Limits](https://docs.vapi.ai/billing/billing-limits) - [Vapi Changelog](https://docs.vapi.ai/changelog/2024/11/11)

so does it mean if I buy 1 line, there will be 11 concurency lines (inludes 10 as default) to be support? @User

Yes Vinh, you are correct Here .