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Plan for Audio Conferencing in Microsoft Teams

  • Article
  • Applies to:
    Microsoft Teams

This article is for administrators and IT professionals who are evaluating Audio Conferencing for Teams meetings.

Audio Conferencing enables users to join a Teams meeting from a phone using a Public Switched Telephone Network (PSTN) phone number. Audio Conferencing is sometimes called dial-in conferencing or PSTN conferencing. Audio Conferencing allows up to 1,000 phone attendees.

Audio Conferencing requires an additional Teams add-on license for each person in your organization who is going to schedule/host an Audio Conferencing meeting. For more information, see Audio Conferencing prerequisites. (Audio Conferencing does not require a Teams Phone license.) ADD LINK TO ADD-ON LICENSING AFTER IT'S UPDATED

This article describes Audio Conferencing concepts, scenarios, and prerequisites. After reading this article, for step-by-step instructions on how to deploy Audio Conferencing, see Set up Audio Conferencing.

Audio Conferencing scenarios

Calling in (dialing in) to meetings is useful for users who are on the road and can't attend a meeting using the Microsoft Teams app on their laptops or mobile devices. But there are other scenarios in which using a phone to attend a Teams meeting can be a better option than using an app on a computer:

  • Internet connectivity is limited.
  • A meeting is audio only.
  • The person tried to join a Teams meeting and it failed.
  • The call quality is better when dialing in.
  • People can join a meeting "hands free" using Bluetooth devices.
  • People find it's easier and more convenient for their situation.

You only need to set up Audio Conferencing for people who plan to schedule or lead meetings. Meeting attendees who dial in don't need any licenses assigned to them or other setup.

After attendees join the meeting, they can also dial out and invite other callers into a Teams meeting. For more information, see Dial out from a Teams meeting so other people can join it.

Audio Conferencing prerequisites

Before you can roll out Audio Conferencing for Teams, consider these questions:

Ask yourself Action
Is Audio Conferencing available for my country/region? To find out if Audio Conferencing is available for your country/region, see Country and region availability for Audio Conferencing and Calling Plans.
Do my users have the proper licensing for Audio Conferencing? Audio Conferencing licenses are available as part of a Microsoft 365 or Office 365 E5 . Audio conferencing licenses are also available as an add-on service for a Microsoft 365 Business Standard, E1, or E3 subscription.
Do I need to purchase Communications Credits for the users who are assigned Audio Conferencing licenses? To learn more, read What are Communications Credits, then check out the Communications Credits section.

For pricing info, see Pricing for Audio Conferencing.

Audio Conferencing bridges

When you set up Audio Conferencing for Teams, you get an audio conferencing bridge. The bridge answers the call for users who are dialing in to the meeting using a phone. The bridge answers the caller with voice prompts from an auto attendant, and then, depending on your settings, can play notifications and ask callers to record their name.

A conferencing bridge can contain one or more phone numbers. The phone number you set is included on the meeting invites for Teams apps. You can change the phone numbers (toll and toll free) on your conferencing bridge.

You can use the default settings for a conferencing bridge, or change settings, such as the PIN. Meeting organizers use PINs to start meetings if they can't join the meeting using the Teams app. For more information, see Settings for Audio Conferencing bridges.

Ask yourself Action
Do I need to add new conferencing bridge numbers? To add new numbers, see Getting service phone numbers.
Will I need to modify the bridge settings? To modify the bridge settings, see Change the settings for an Audio Conferencing bridge.
Do I need to port numbers to use with Audio Conferencing? To learn about porting phone numbers, read Transfer phone numbers to Teams.

Phone numbers for Audio Conferencing bridges

There are two types of service phone numbers that can be assigned to your conferencing bridge:

With Audio Conferencing, your users can use toll and toll-free service phone numbers to dial in to meetings. Toll numbers are automatically assigned as shared Audio Conferencing numbers to organizations when they're enabled for Audio Conferencing.

The default Audio Conferencing number assigned to an organizer is included only in the meeting invite. However, a caller can use any of the phone numbers assigned to your conferencing bridge to join a meeting. You can find the list of phone numbers available for joining a meeting using the Find a local number link included on every meeting invite.

For more information, see Phone numbers for Audio Conferencing in Microsoft Teams.

Toll-free phone numbers are available, but only in some countries/regions. To see what is available in your country or region, see Country and region availability for Audio Conferencing.

Dedicated phone numbers

Dedicated phone numbers are service numbers that are only available to users within your organization. Dedicated toll and toll-free service numbers can be assigned to your organization from other cities.

You can change the languages that are used when someone calls in to a dedicated number. For more information, see Set auto attendant languages for Audio Conferencing in Microsoft Teams.

You can get dedicated toll and toll-free phone numbers for your conferencing bridges in one of three ways:

  • Use the Teams admin center. For some countries/regions, you can get numbers for your conference bridges using the Teams admin center. See Getting service phone numbers.

  • Port your existing numbers. You can port or transfer existing numbers from your current service provider or phone carrier to Microsoft 365. for more information on porting existing numbers, see Transfer phone numbers to Teams or Manage phone numbers for your organization.

  • Use a request form for new numbers. Sometimes (depending on your country/region) you aren't able to get your new phone numbers using the Teams admin center, or you need specific phone numbers or area codes. If so, you need to download a form and send it back to us. For more information, see Manage phone numbers for your organization.

Shared phone numbers

Shared phone numbers are service phone numbers that can be shared with other Microsoft 365 organizations. Toll numbers are automatically assigned as shared Audio Conferencing numbers to organizations when they're enabled for Audio Conferencing.

You can't change the languages that are used when someone calls in to a shared number.

The shared phone number assigned as the default number of the bridge is a number from the country/region of the organization.

Note

The country or region location of your organization can be found by signing in to the Microsoft 365 admin center and looking under Organization Profile.

Caution

Due to limited availability of toll phone numbers in Venezuela, Indonesia, and United Arab Emirates (UAE), organizations from these countries/regions won't have an Audio Conferencing toll number automatically assigned to them. Toll-free numbers from these locations are available depending on available inventory.

To see a list of those countries/regions that have phone numbers automatically assigned to organizations, see Country and region availability for Audio Conferencing and Calling Plans.

Communications Credits

To provide toll-free conference bridge phone numbers and to support conferencing dial-out to international phone numbers, you must set up Communications Credits for your organization. To learn more about Communications Credits, see What are Communications Credits?.

Ask yourself Action
Are Communications Credits required for my Audio Conferencing implementation? To find out if you need to set up Communications Credits, see Set up Communications Credits for your organization.
If they're required, how much should I purchase? To determine the Communications Credits amount, see Recommended funding amounts.
Do I want to configure an auto-recharge amount? To configure an auto-recharge amount, see Set up Communications Credits for your organization.

Manage Audio Conferencing

You might want to change Audio Conferencing settings based on your organization's needs and configuration. For exmple, you can change settings for the service, the bridge, your users, and for specific meetings. For more information, see the Manage section of the Audio Conferencing articles.

Meeting and call quality

Teams provides several tools to monitor and manage call quality. For more information, see Manage call quality.