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Not receiving incoming calls to OCS clients RRS feed

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    So we currently have a few users testing out OC 2007 R2; however, they are unable to receive calls from the outside. The user can make calls outside the company and they can receive calls using 4-digit dial from inside the company but no calls from outside.

    What happens is that someone calls them and the phone beeps 3 times and then the call is disconnected. The only way the user knows they received the call is because the Exchange UM sends them an email telling them they missed a call and it is gives the caller ID info as well. So it's strange that the caller ID info comes in but the end-user cannot hear the phone ring actually neither source nor the destination user hears a ring tone.

    My PBX is transferring it to the gateway and as soon as the gateway hits the mediation server it disconnects. Not sure if this is the PBX that is having timeout issues or something not configured properly on the mediation server.

    Please someone help!!
    Monday, July 20, 2009 11:12 PM

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    We got a PBX upgrade and for some strange reason on 2 T1s that I did not think were associated with T1 that housed the OCS stuff the "Enable ISDN Two B-Channel Transfer" was set to "yes" and it should be "no." Took over 20 hours of beating my head.

    Thanks for your assistance Kevin.
    • Marked as answer by akg8r Tuesday, July 21, 2009 7:01 PM
    Tuesday, July 21, 2009 7:01 PM

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    Is your PBX trying to communicate with the mediation server using TLS?  Do they trust each other (cert and DNS wise).  Please post a bit more about the PBX and how it and the med server are configured and I'll try to help.

    Thanks!

    -kp

    Kevin Peters MCSE/MCSA/MCTS/CCNA/Security+ blog: www.ocsguy.com
    Tuesday, July 21, 2009 1:52 AM
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    My PBX is an Inter-Tel Axxxess version 11.1010 The PBX communicates with the AudioCodes gateway (Mediant 1000) which in turn communicates with the mediation server (Windows Server 2008, 64-bit). Technically the gateway is transferring all the information between the PBX and the mediation server. The call gets to the PBX which them pushes it out to the gateway which gets it to the mediation server for like 1/2 second and then the call drops.

    If you need detailed configuration info please let me know what it is that you need.
    Tuesday, July 21, 2009 2:49 PM
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    I'd check the log on the mediant 1000 and see how it is sending the call over.  Are you manipulating the number down to the users Line URI?  If you're going to put a lot of folks on OCS I'd recommend using an upstream model with the M1K (if it enough T1 ports), this will allow it to control the routing and will make it easier when you are ready to remove the Intertel.   I've done similar configs with InterTEL (but in upstream), some of the detail is documented in this series of posts on my page.  Have a look there and see if it helps, if not please send some info from the log on the audio codes so we can see what it is seeing.

    http://ocsguy.com/2009/06/11/part-1-howd-ya-like-to-trade-in-that-old-pbx-for-a-shiny-new-ocs-environment/

    Hope this helps!

    -kp
    Kevin Peters MCSE/MCSA/MCTS/CCNA/Security+ blog: www.ocsguy.com
    • Marked as answer by akg8r Tuesday, July 21, 2009 7:01 PM
    • Unmarked as answer by akg8r Tuesday, July 21, 2009 7:01 PM
    Tuesday, July 21, 2009 4:52 PM
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    We got a PBX upgrade and for some strange reason on 2 T1s that I did not think were associated with T1 that housed the OCS stuff the "Enable ISDN Two B-Channel Transfer" was set to "yes" and it should be "no." Took over 20 hours of beating my head.

    Thanks for your assistance Kevin.
    • Marked as answer by akg8r Tuesday, July 21, 2009 7:01 PM
    Tuesday, July 21, 2009 7:01 PM