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Called Skype for Business number (Enterprise) but caller could not hear a ringback tone RRS feed

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    Here i am again and it seems that most of my questions or problem either difficult to answer or unable to resolve.

    But will still give this a try and see if anyone from you guys had experience this issue.

    Skype to Skype call are all good and working. However, our environment got one special setup wherein the main number (which is a standard PSTN phone with handset) configured to forward calls to a Skype for Business number. when this setup is in effect, callers from outside when they called the main line and then the call being forwarded to Skype for Business number, the caller can not hear any ringback tone. it's either callers will just hear someone saying hello because the call has been pickup or it will go to voicemail (but no ringback tone). if we disable the call forwarding from main line to Skype for Business, everything worked perfectly. So what could be the issue? is it in the Skype for Business environment or is it from the callers Telephone Service Provider or is it in our gateway?

    Saw this article but haven't tried yet

    https://blog.kloud.com.au/2016/05/27/change-ring-tone-behaviour-with-a-sonus-sbc-and-sip-trunk-provider/

    maybe you guys have encountered this issue and can shed some light.

    Thank you.

    Friday, May 24, 2019 5:34 AM

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    Hi EVM06,

    If external user directly calls the Skype for Business number, could it get the ringback tone?

    The ringback tone is usually related to “180 Ringing”. It is better to collect logs to check if it is sent and received.

    Here is an article about “No ring back in PSTN to Lync calls”, you may refer to it.

    https://cmcgreanor.wordpress.com/2014/12/30/no-ring-back-in-pstn-to-lync-calls/

    Note: This response contains a reference to a third party World Wide Web site. Microsoft can make no representation concerning the content of these sites. Microsoft is providing this information only as a convenience to you: this is to inform you that Microsoft has not tested any software or information found on these sites and therefore cannot make any representations regarding the quality, safety, or suitability of any software or information found there. There are inherent dangers in the use of any software found on the Internet, and Microsoft cautions you to make sure that you completely understand the risk before retrieving any software on the Internet.

    Best Regards,
    Shaw Lu

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


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    • Edited by Shaw_Lu Friday, May 24, 2019 8:03 AM
    • Proposed as answer by Shaw_Lu Wednesday, May 29, 2019 9:54 AM
    Friday, May 24, 2019 8:03 AM
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    Hi,

    Is there any update on this case?

    Please feel free to drop us a note if there is any update.

    Thank you for your understanding and patience!

    Best Regards,
    Shaw Lu

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


    Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

    Friday, May 31, 2019 9:35 AM