Teams: Plan for Audio Conferencing Video Summary

Next in the Audio Conferencing Video series is Planning. This video is from the Microsoft Teams documentation and practical guidance Cloud Voice video’s here

Planning for anything is critical and planing Audio Conferencing with Teams is important as well. There’s more than you think to consider when enabling Audio Conferencing in Teams for your users so lets take a look.


Video starts off by referencing by now we hope your already introduced to Audio Conferencing in Teams (Formally PSTN Conferencing or Dial In Conferencing)

I did a Video Summary on the introduction video here if you want to check this out first.

This is the planning session on Audio Conferencing and first we start with Terminology and theres quite a few terms used in this video.


  • Audio Conferencing (With Capital A and Capital C) refers to Audio Conferencing in Office which allows callers to join meetings hosted by Teams and SfB Online.
  • The Audio Conferencing services are powered by SfB Online Audio Conferencing infrastructure
  • Callers dial into a conferencing bridge phone number and this phone number is using a type of phone number in Office 365 called a Service Number
  • Service Numbers allow multiple simultaneous calls to the same number to connect multiple callers into the same bridge. (These are different to numbers you assign to users with Microsoft Phone System)
  • The services numbers can be toll where callers will be charged or toll free where the meeting organisers will be charged
  • In Office 365 to set up a toll free number your organisation must have Communication Credits enabled formally known as PSTN consumption billing. This is a set of funds setup by your organisation for toll free usage and also for international dial out.
  • For the Audio conferencing service dial out mean the ability to join the audio portion of the meeting using their phone not PC audio or meeting organiser can dial out / invite other participants using their phone numbers.
  • The service numbers can be obtained from Microsoft or if you want to port existing conference numbers these can be transferred (ported) to Microsoft.

What’s the planning steps involved ?



Before you implement Audio Conferencing as part of Office 365 deployment you need to first check the following

  • Audio Conferencing Add on is available in your country or region ? (List is growing and check for latest info) You can check here and select your country to check here
  • Based on market availability you can begin planning by noting office locations that are covered by Audio Conferencing
  • Audio Conferencing licence is separate add on to E1 and E3 or available as part of qualifying Office E5 subscription plans
  • Audio Conferencing licence is only required for meeting organisers
  • Meeting Participants do not require a licence
  • List users as designated organiser and will require a Audio Conferencing licence

For Communications Credits – you need to plan

  • Initial amount
  • Trigger amount
  • Auto recharge amount

To plan Communication credits its not an exact science and relies on toll free, start on total of conference minutes x participant.

If you currently operate another service you may be able to gauge the meeting minutes and use the call rates.


Next step is to decide how you want to plan conference bridge phone numbers

Two types of conference bridge phone numbers

  • Shared
  • Dedicated

Shared conference phone number  are made available (Shared) to several office 365 tenants and pre configured settings with phone number and languages

For dedicated these are available to your tenant only and offer the most flexibility and you set your own languages.

Default conference bridge phone number toll or toll free assigned to a user are determined by the Office 365 subscription location.

For example users with Australia will be assign Sydney conference phone numbers you can set one bridge number as default.

For dedicated service phone number you can choose to acquire new service number or transfer (Port) a phone number.

To acquire you can use the admin centre or submit new telephone number form to Microsoft service desk. The use of new telephone number form is new and too support requirements that cant be submitted via the office 365 admin centre.

Availability of brdige number can be limited by country, region and city therefore shared numbers may have to be used in some scenarios.

Porting of existing telephone numbers can be used, number porting is available only in region where Calling Plan formally known as PSTN Calling is available in, at the moment we have

US, Puerto Rico, UK, France, Spain, Belgium, Ireland, Germany, Netherlands

Check what’s available in your region here:

You will need to submit manual request to port existing service numbers

If your country / region is only covered by Audio Conferencing and are not listed as approved countries for Calling Plans it recommends contacting the Microsoft service desk to enquire as there could be legal reasons why porting of existing numbers cant take place.

Dedicated phone number provide flexibility around languages, you can add up to 4 additional as well as the default so 5 in total.

Once this is completed you can continue to plan to document types of phone numbers you want to use for each of your office locations and to obtain new or use existing for each office location.

Also you need to assign a tenant default bridge number

For more info on porting there is separate video on this here.


To further customise the meeting join experience you can configure several behaviours on the bridge

Support enablement or disablement of entry and exits announcements

  • names
  • phone numbers
  • tones
  • ask callers to record names

For phone users to join meeting as authenticated they need to use their conference pin.

Also you can notify end users on audio conferencing changes

You should document the tenant wide configuration setting as part of your planning.

You can also configure on a per user basis


You can set default numbers that are displayed in meeting invite, you can allow users to bypass lobby and set dial out restrictions and disallowing toll free and or dial out.

As part of planning document any user specific settings configured

Please note Cost related controls are in preview only ! you need to participant in

Its recommended to plan for them so when they hit GA you can take advantages of them.


If you wish to enable dial out as part of Audio Conferencing you need to decide how you want to handle dial behaviour from end users. Effective dial plan is used to normalise numbers when using dial out from conference.

By default the service dial plan which is created for each countries and assigned to user based on licence location is use to handle dial out scenarios.

You can assign tenant dial plans, if you assign tenant dial plan to tenant or user the effective dial plan will be a combination or service and tenant dial plan.

There are a limit of 25 normalisation rules on each tenant dial plan and highly recommended to avoid duplication’s on the service dial plan.

As part of planning document dial plan configuration this may included office locations and office location better served by service dial plan.

For more info on tenant dial plan go to

Final topic to prepare is


Make sure the correct type of meetings are enabled as part of Teams service level settings

Audio Conferencing is only available for scheduled meetings in Teams today!

There are two possible scope

  • Private are visible to invited participants only
  • Channel meetings are visible to all members of the team in the channel

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