Teams: Introduction to Audio Conferencing Video Summary

Having a look over the Microsoft Teams documentation and practical guidance site i wanted to see if there’s any new videos and i spotted a couple i haven’t watched on Audio Conferencing so wanted to give a summary of the video.

These videos are under Cloud Voice > Videos > Audio Conferencing or visit here

First up is the introduction to Audio Conferencing in Teams, if you were familiar with PSTN Conferencing with Skype for Business Online its the same thing but the name has been change to Audio Conferencing. Also in the video it refers to Audio Conferencing as dial in conferencing as well which is the same.

Introduction to Audio Conferencing


Lets check the Agenda for the session


First we start with introducing Meetings in Teams


Teams as a chat based workspace in Office 365 also includes the ability to host meetings with other people using Teams


Here we summarize a meeting as Meetings in Teams is all about people together remotely to chat about anything.

Teams meetings involves audio conferencing, group chat and can also have video and sharing. But you use any one or more of these during your meeting.

Also the video mentions to notice and pay attention to the Lower case use of audio conferencing WITHOUT the capital A and C which is official in Office 365.

The audio conferencing (lower case a and c) part in Teams meetings serve function to enabled conversation to use voice and typing long messages as instant messages.

Meetings can also include chat to all participants.

Voice and chat make up the foundation of meetings

Video in meetings can be used for facial expression and great to put name to a face

Screen sharing help discussions for topics where people would also like to share content and people can relate to what’s being discussed.


  • Meetings in Teams can be scoped as Private where meetings are known to specific people who were invited or can also be scoped as a channel meeting.
  • Channels meetings are shown in channel meetings and people can see meeting in progress and can join.
  • Meetings can be adhoc and created direct in teams channel
  • Or schedule meetings in calendar or reschedule meeting
  • Scheduled meetings can be private or channel meeting depending on scope

So what is Audio Conferencing in Teams ?


Before we look at Audio Conferencing in Teams Lets talk about Audio Conferencing in Office 365


Audio Conferencing is formally known as PSTN Conferencing Or commonly known as dial in conferencing.

They all refer to the same thing which is the ability for a meeting to include participants that are able to dial into the meeting by the PSTN using a mobile phone, landline from home or office / PBX phones. Meeting invites have a conference bridge telephone number people can call and join the meeting. Organizer can also dial out to participants telephone numbers for them to join the meeting as well.

Audio conferencing also includes the ability to first join by Teams app and then dial out via Phone this is useful where cases you don’t have a good headset or network connection can not support reliable voice conversation

Audio Conferencing in Office 365 supports toll and toll free numbers

  • Toll numbers are where the caller will get charged
  • Whilst toll free the meeting organiser will get charged for the call

Conference bridge phone numbers included

  • Shared numbers used by other tenant
  • Dedicated numbers but your tenant only.

Numbers can be

  • Net new
  • Transfer / port to Microsoft

Licencing requirements for Audio Conferencing in Teams are essentially the same as Skype for Business Online and licenced as part of E5 plan or obtained as add on for E1 or E3 plans

To set up and use toll free and to provide dial out internationally you need to set up communications credits or formally known as PSTN Consumption Credits.

Conferencing bridge and Audio Conferencing service can be enabled to have entry and exit announcement to join as authenticated caller users will have to use their pin to join the meeting.

Default pin length is 5 but configurable 4 – 12 digits

You can use this option to adjust Audio Conferencing security to match organisation policy

Dial out usage Audio Conferencing support the use of effective dial plans, the combination of service and if applicable tenant dial plan. to dial out users can use preferred dial in behavior and not having to dial full E164 numbers to dial out.


Currently in Teams the use of Audio Conferencing in Teams is for Scheduled Meetings only !

If you prefer to schedule using outlook you can schedule using Teams meeting add in for Outlook the conference bridge phone numbers associated with organiser and conference id will be added to the invite.

You can also schedule directly in Teams, in this case the conference bridge phone numbers and id will be added after sending the meeting invite.

As meeting participants users can choose to dial in via conference bridge telephone number or via Teams or use the Teams client and use the dial in prompt to via the meeting via PSTN. You can view the meeting content in Teams in this case and audio via Audio Conferencing functionality.


There are two meeting join experiences for users dialing into meeting

  • Authenticated
  • Unauthenticated

By default only authenticated callers can start a meeting

In order for PSTN callers to be admitted as authenticated callers they need to use dial in conferencing pin. Usually set out when audio conferencing licence is applied and sent to users.

Users can reset pin if forgotten.

For unauthenticated pstn callers they will be placed in lobby if meeting has not started

If you wish unauthenticated pstn callers can be enabled to bypass lobby to automatically start a meeting.



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