Connecting Lync Server 2010 to Audiocodes Mediant Gateways


Rudi Groenewald is an Azure Infrastructure Technology Solutions Professional (TSP) at Microsoft, helping customers with their journey into Azure.

13 Responses

  1. Frank Carius says:

    On Tipp from a Lync Guy. DO NOT Change the normalisation within lync to get the dialable phone number, stay with E164 in in the SIP world. If oyu have to stripp of the “+” or countrycode, you should to that on the gateway level. The gateway is the right location, because this knows where it is and knows how to handle NPI and TON (ISDN Parameters). Also for incoming call: The gateway should normalize Caller and Called Number to E164 and forward that to Lync.

  2. Arif says:

    Great post.Can you please post regarding Lync server and Mediant(PSTN Gateway)from scratch.

  3. Troy says:

    So your blog was by far the most useful in getting out Lync system up and running but I have an odd scenario. I can receive incoming calls but cannot make outgoing. In watching the data flyby in wireshark I can see that the incoming call has 10 digits just as I asked for from tome Telco and the our bound have 10 as well. I followed your guide here step-by-step and again incoming works great outgoing not so much.

  4. onur says:


    How do you enable IP2IP on mediant 600? Or do we have to? Can you share more detailed setup if it is possible. We receive the logs below.

    CSEQ: 237 ACK
    CALL-ID: 649fcfec-8fef-4a94-b989-d450b8322253
    VIA: SIP/2.0/TCP;branch=z9hG4bKd273fb8b

    1d:2h:26m:44s ( lgr_flow)(70844 ) | |(SIPTU#40)ACK State:Disconnected(649fcfec-8fef-4a94-b989-d450b8322253)
    1d:2h:26m:44s ( lgr_flow)(70845 ) | | TransactionUserMngr::ReturnSIPCall – #40
    1d:2h:26m:44s ( sip_stack)(70846 ) SIPCall(#40) changes state from Disconnected to Idle

  5. Li Meng says:

    thanks for your post, it is very usefull.
    one thing need your help. how can I set up voice mail for the user? do I need any additional server or lync 2010 have this feature built-in? we are using AudioCode Voice Gateway + Lync2010 + Polycom IP phones. It will be great you can show how to set thie VM up step-by-step as this post, thanks!

    • Tjopsta says:

      Lync uses Exchange 2010 UM to do voicemail, so no, lync doesnt have it’s own voicemail features. It’s pretty easy to setup if you have exchange 2010 in your environment already, but that’s a whole new blog post.

  6. kanishka says:

    Thanks for the post this is really helpfull.

  7. Ramana says:

    This is very useful & thanks…

  8. juan puebla says:

    thanks for the post. Not easy to find info on this!

  1. October 29, 2011

    pbx with voip,voip and business,voip for business,voip phone system,voip telephone system…

    […]Tjopsta » Connecting Lync Server 2010 to Audiocodes Mediant Gateways[…]…

  2. November 5, 2012


    You can certainly see your enthusiasm within the paintings you write. The world hopes for even more passionate writers like you who aren’t afraid to say how they believe. All the time go after your heart. “Golf and sex are about the only things you c…

What do you think?

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: