# Create a Conference Room

Before anyone can join a conference call, you need a conference room for them to dial into. Each room has its own extension number, optional passwords, and prompt settings. Follow the steps below to add one to your Cloud Voice system.

## Add a conference room

1. Sign in to the PBX (Private Branch Exchange, your phone system) web portal and open **Call Features > Conference**, then click **Add**.
2. Configure the room:
   - **Number**: The extension callers dial to enter this conference. Pick a number that does not clash with an existing extension.
   - **Name**: A label that helps you recognize the room in the portal.
   - **Participant Password**: Optional. When set, callers must enter this password to join as regular participants.
   - **Moderator Password**: Optional. When set, callers who enter this password join as moderators (participants who can control the call).
   - **Voice Prompt**: Chooses what participants hear when someone enters or leaves the call:
     - **Default**: Plays a tone on each join or exit.
     - **Extension**: Announces the extension number of the person joining or leaving.
   - **Custom Prompt Language**: Optional. Turn this on to set the language of the system prompts participants hear when they join.
   - **Wait for Moderator**: When enabled, participants cannot talk to one another until a moderator joins.
   - **Allow Extension Participants to Invite**: When enabled, extension users already in the room can invite others to join.
   - **Moderator(s)**: Select the extensions that act as moderators. Moderators join without entering any password.
3. Click **Save**, then **Apply**.

:::tip
Set a **Participant Password** when a conference should stay private, and a **Moderator Password** (or assign **Moderator(s)**) so at least one person can run the call. Pairing this with **Wait for Moderator** keeps callers on hold until someone in charge arrives.
:::

:::note
The languages available for **Custom Prompt Language** come from your configured system prompts (**PBX Settings > Voice Prompt > System Prompt**).
:::

:::caution
**Apply** must be clicked after **Save** for the room to take effect. If you only save, the conference will not work until the pending changes are applied.
:::

## Let external callers join

Conference rooms are reachable by internal extensions out of the box. To let people outside your organization dial in, set up an [inbound route](/pbx/administrator-guide/set-up-an-inbound-route/) and point its **Destination** at **Conference**. An inbound route connects an external phone number (a DID, or Direct Inward Dialing number) to a destination inside your phone system.

:::caution
When an inbound route sends a public number straight to a conference, anyone who dials that number can enter the room. Set a **Participant Password** and only route trusted numbers to the conference, otherwise you risk unauthorized callers joining and running up call charges.
:::