# Concurrent Calls

The **Concurrent Calls** page controls how many live phone conversations your AI agents can handle at once. It determines how many simultaneous callers can connect to your AI, and it’s fully scalable, meaning you can add as many concurrent call slots as you need for each phone number.

#### **What Are Concurrent Calls?**

Concurrent calls represent the **number of simultaneous live conversations** your AI can manage.

For example:

* If a phone number has **2 concurrent calls**, it can handle **2 callers at the same time**.
* If a **3rd person calls**, they’ll enter your **queue system** until one of the active calls ends.

Every concurrent call slot functions like a “virtual line” connected to your AI — giving you the power to handle multiple conversations through a single phone number.

#### **Call Queueing System**

If all your concurrent call slots are full, Stammer automatically plays a queue message to keep the caller informed:

> **“All available agents are busy right now, please stay on the line.”**

Once a slot becomes available, the next person in line is connected automatically.

This creates a smooth, professional experience and ensures **no leads are lost**, even during busy call periods.

#### **Scaling Concurrent Calls Per Phone Number**

You can purchase and assign **as many concurrent call slots as you need** for each phone number in your account.

This flexibility lets you scale based on your call volume and business size.

#### **How to Purchase Additional Concurrent Calls**

1. Go to the **Voice Agents** page in your Stammer dashboard.
2. Find the phone number you want to scale.
3. Click the edit button next to the number of **Concurrent Calls**.
4. Select how many additional call slots you want to purchase.
5. Confirm the update. New capacity activates within 2 hours.

Each additional slot is billed monthly (usually around **$15 per concurrent call** depending on when purchased as these are pro-rated).

#### **Why It Matters**

Scaling concurrent calls per phone number allows you to:

* Support **large inbound traffic** without dropped calls.
* Run **multiple campaigns or departments** under one account.
* Handle **peak hours** efficiently with queued overflow.
* Keep every caller connected and engaged while your AI works in real time.

Whether you’re handling a few calls per hour or hundreds, Stammer’s concurrent call scaling ensures your AI never hits a bottleneck.


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