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Anonymous/private PSTN calls to a Lync Response Group do not work always RRS feed

  • Question

  • When a caller with a blocked id calls to the lync response group, most of the time lync response saying :

    SIP/2.0 488 Not Acceptable Here
    FROM: "Anonymous"<sip:anonymous@anonymous.invalid>;tag=SWxoMO6aX6.
    TO: <sip:3211211212@trunk1.speakup.be:5060>;epid=1AA4D5B2E4;tag=3677a7715

    When I call using a normal pstn number it works fine and it uses TRUNK1 eg:

    SIP/2.0 100 Trying
     FROM: "3211363636"<sip:+3211362362@sip.speakup.nl>;tag=mS38EZ5SgwC
     TO: <sip:3211211212@trunk1.speakup.be:5060>

    If I then call using a blocked number it works WHEN it is using TRUNK1 :

    FROM: "Anonymous"<sip:anonymous@anonymous.invalid>;tag=cHz4HWaX7cV
     TO: <sip:3211211212@trunk1.speakup.be:5060>

    IF it is using TRUNK2 it will not work :

    SIP/2.0 488 Not Acceptable Here
     FROM: "Anonymous"<sip:anonymous@anonymous.invalid>;tag=cHz4HWaX7cV
     TO: <sip:3211211212@trunk2.speakup.be:5060

    Problem is if I would not call for eg 5 minutes and then call again using the blocked number it will fail.

    If I then call using a normal number it works and afterwards it works as long as it is using the same trunk (so either 1 or 2, depending on which one the normal number used just before)

    What the hell is this ?? Or better how can I solve it.

    I send this to my provider :

    http://unifiedme.co.uk/2013/10/incoming-anonymous-call-failure-lync/

    But they told me it is a LYNC problem ??

    Wednesday, April 2, 2014 3:27 PM

All replies

  • Hi Toon,

    I'm assuming you are not using a provider listed on the Lync IOP page.

    What they are sending "@anynymous.invalid" is not a valid FQDN/IP so that's the problem (as you can see on that blog).

    The way to fix it is to ask your provider to fix it (unlikely), change your provider to a Lync supported one or get a SBC to fix that on your side.

    Regards,

    Hugo


    Hugo Picão
    MCIPT:Lync 2010 / MCITP:EA / MCTS:OCS / MCTS:W2K8 / MCSE: 2003
    My Blog

    Thursday, April 3, 2014 1:20 PM
  • Problem is they are (SPEAKUP)

    http://technet.microsoft.com/nl-be/lync/fp179863.aspx#SIPfor2010

    I told them this, but they said they are following RFC 3261 , which is used by LYNC according to them.

    I cannot find another official page where it says one needs to add user=Phone  or something like that to the header so I can push them.

    What does SBC stand for ?

    PS : I don't use a gateway. My lync server is directly connected to a firewall and that to the internetmodem.

    • Edited by Toon Sillen Thursday, April 3, 2014 1:24 PM extra
    Thursday, April 3, 2014 1:23 PM
  • Yeah, i actually know another SIP provider on that list that has the same exact issue... shame this is not one of the tests for qualification :)

    It's not about "user=phone", it's about Lync 2010 and 2013, by design, need to trust the FQDN/IP of where the call is coming from. If the sip provider sends an invite saying he's coming from "anonymous.invalid" that will always fail. 

    SBC = Session Border Controler

    I would advise you to get one and that will make this, and maybe other problems in the future, to go away.

    Check for Sonus, AudioCodes...



    Hugo Picão
    MCIPT:Lync 2010 / MCITP:EA / MCTS:OCS / MCTS:W2K8 / MCSE: 2003
    My Blog

    Thursday, April 3, 2014 6:07 PM
  • "It's not about "user=phone", it's about Lync 2010 and 2013, by design, need to trust the FQDN/IP of where the call is coming from. If the sip provider sends an invite saying he's coming from "anonymous.invalid" that will always fail. "

    So I read wrong then.

    Then what should the SIP Provider change in his header ?

    Thursday, April 3, 2014 6:15 PM
  • Should be:

    FROM: "Anonymous"<sip:anonymous@providerIP>

    as for example

    FROM: "Anonymous"<sip:anonymous@1.2.3.4>

    or a FQDN instead of a IP, as long as you added that in as your PSTN Gateway in the topology.



    Hugo Picão
    MCIPT:Lync 2010 / MCITP:EA / MCTS:OCS / MCTS:W2K8 / MCSE: 2003
    My Blog

    Thursday, April 3, 2014 7:06 PM
  • The provider just sent me an email with the two images and asking me to change it like that.

    The trunk one does not look like mine so I cannot change a lot , is this 2013 maybe ?

    And what about the mediationserversvc.exe config file. Would that help ?

    file in c:\program files\microsoft lync server 2010\mediation server :


    • Edited by Toon Sillen Friday, April 4, 2014 12:06 PM added configfile image
    Friday, April 4, 2014 12:03 PM
  • My trunk config looks like :

    Friday, April 4, 2014 12:07 PM
  • so, how'd this one end up?  Curiously. 

    if my post is helpful - please click on the green arrow. (please excuse, in advance, any perceived sarcasm/humor - as I often forget it does not translate through text) :)

    Monday, July 28, 2014 4:36 PM