Skype for Business PSTN conferencing RRS feed

  • Question

  • Hi guys,

    Just have a quick question that I think I might not have understood.

    We are moving from Lync 2010 to Skype for Business Online and we use pstn/dial-in conferencing a lot.

    today its set up using a sip trunk.

    now when we move ALL users to SfB Online, what are our options?

    1) keep current environment and sip trunk? can online users utilize local on-prem dial-in features? (have got mixed impressions here)

    2) if not, keep the users that need this on-prem and move the rest to the cloud? (this is not what we are aiming for)

    3) deploy 1 skype for business server std edition and one edge? how many concurrent conferences can that one have? no users will be homed there... single-point-of-failure must be taken into account.

    4) deploy Cloud Connector Edition (is that 4 servers? 2 front-ends narrowed down to mediation role and 2 edge servers?)

    5) use a Audio Conferencing Provider (ACP)?

    6) use Microsoft, InterCall etc as the provider?

    Main question is if all users that need this feature are homed in SfB Online,  is only option 4 and 5 available? and they cannot use PSTN/Dial-In features on-prem via hybrid?

    Thanks alot!

    Monday, December 19, 2016 10:33 PM

All replies

  • Hi [zid],

    Welcome to post in our forum.

    Regarding these issues, please refer to the following content:

    1.You can use same sip trunk and has to be in hybrid mode or migrate your numbers to Microsoft and use pure SFB online

    2.If you deploy CCE in your environment, then SFB online users can utilize local on premise dial-in features, for details, please refer to

    3.You could deploy one SFB SE and one Edge server.

    4. For deploying CCE in your environment, please refer to the following document

    5. If you want to provide dial-in conferencing to users hosted on Cloud Connector, you can purchase PSTN conferencing from Microsoft or from audio conferencing provider (ACP) partners.

    6. Yes, you can use Microsoft provider or you could use third party providerhttps://support.office.com/en-us/article/Set-up-dial-in-or-PSTN-conferencing-for-Skype-for-Business-d01954f1-4f37-4cf5-a636-20039e5c59e9

    In a conclusion, after you migrate all your users to SFB online, if you deploy CCE, the users homed at SFB online could use PSTN/dial in features in on premise.

    Hope this reply is helpful to you.


    Alice Wang

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Tuesday, December 20, 2016 2:31 AM
  • Hi again...

    just to clarify... you mentioned that I can use skype for business standalone server and edge in a hybrid configuration to be able to utilize the local sip-trunk for all users that are homed online? then you mentioned that I have to use CCE for users homed online to be able to use a local sip-trunk? 

    If I read this article "Skype for Business Online service description" it says:

    "In Office 365, you can enable dial-in conferencing either by using Microsoft and Office 365 as your dial-in conferencing provider, or by using a third-party dial-in conferencing provider (also called an audio conferencing provider, or ACP)"

    There are no information there about a hybrid scenario with lync 2010/lync 2013/ SfB or CCE???


    And where does the license come into play? require online add-on license for E3 or "on-prem Plus CAL"?

    If the online user is setting up a meeting the "pstn conferencing information" will be generated on-prem and pulled out to the skype for business online environment and provided into the meeting?

    I don't get this! :) Please explain! (would be easier to just say no its not supported, go with microsoft as a provider or a 3rd party provider) for all users that are homed online... hehe

    • Edited by [zid] Tuesday, December 20, 2016 3:49 PM
    Tuesday, December 20, 2016 3:00 PM
  • Hi [zid],

    Thanks for your response.

    If all users have been migrated to SFB online, you don’t have to deploy SFB standalone server and Edge server for SFB on premise.

    We deploying CCE in order to provide a way let SFB online user utilize the service on SFB on premise.
    You could configure SFB online hybrid with Lync 2010/2013, the following blog is for your reference

    Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.


    Alice Wang

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Friday, December 23, 2016 10:19 AM