Comments on: Citrix: What to know about HDX RealTime Optimization Pack for Microsoft Lync https://blog.myvirtualvision.com/2012/07/13/citrix-hdx-realtime-optimization-pack-for-microsoft-lync/?utm_source=rss&utm_medium=rss&utm_campaign=citrix-hdx-realtime-optimization-pack-for-microsoft-lync My thoughts on application delivery Mon, 30 Jun 2014 18:10:04 +0000 hourly 1 https://wordpress.org/?v=6.9 By: k.baggerman https://blog.myvirtualvision.com/2012/07/13/citrix-hdx-realtime-optimization-pack-for-microsoft-lync/#comment-1621 Mon, 30 Jun 2014 18:10:04 +0000 http://blog.myvirtualvision.com/?p=1257#comment-1621 In reply to Mike.

Mike, I would start with a test with HDX Media Engine 1.4. Like I said, we’ve seen similar issues being solved by simply upgrading.

]]> By: Mike https://blog.myvirtualvision.com/2012/07/13/citrix-hdx-realtime-optimization-pack-for-microsoft-lync/#comment-1583 Sat, 28 Jun 2014 19:03:15 +0000 http://blog.myvirtualvision.com/?p=1257#comment-1583 In reply to Mike.

We are also using SIP over TLS, which I know can complicate things a bit. Again, just to recap:

unoptimized calls work fine and reach voice mail as it should

From a thick client calls work fine and reach voice mail as it should

When calling an offline Lync user the call goes to voice mail as it should

When calling up optimized (thin client) the calls works, but when it is suppose to go to voice mail, it rings 10 times in all and has a Lync Media Engine failure.

]]> By: Mike https://blog.myvirtualvision.com/2012/07/13/citrix-hdx-realtime-optimization-pack-for-microsoft-lync/#comment-1581 Sat, 28 Jun 2014 18:25:54 +0000 http://blog.myvirtualvision.com/?p=1257#comment-1581 In reply to k.baggerman.

We are using 1.1, but from a telephony stand point it looks like the call was initiated from the HDX media engine and then the Lync server sends an invite to the Lync client (UCCPI 4.0) instead of the HDX media engine/client. The remote_SIP_User-agent starts off as the HDX and then the next 3 or 4 invites goes to remot _SIP_User-agent is UCCAPI 4.0

In our lab, when optimized the remote_SIP_User-agent seems to always be the HDX and not the UCCAPI 4.0. Again, I am not a Citrix engineer, I am just looking at the logs.

]]> By: k.baggerman https://blog.myvirtualvision.com/2012/07/13/citrix-hdx-realtime-optimization-pack-for-microsoft-lync/#comment-1549 Fri, 27 Jun 2014 06:41:04 +0000 http://blog.myvirtualvision.com/?p=1257#comment-1549 In reply to Mike.

Which version of the HDX Media Engine are you using? I’ve heard from one of my colleagues that he had to upgrade to 1.4 because they were experiencing the same issues.

]]> By: Mike https://blog.myvirtualvision.com/2012/07/13/citrix-hdx-realtime-optimization-pack-for-microsoft-lync/#comment-1547 Fri, 27 Jun 2014 01:48:16 +0000 http://blog.myvirtualvision.com/?p=1257#comment-1547 Hi Kees,

Have you every had an issue with the Lync 2010 Media Engine crashing when full optimized on thin clients while placing a call to voice mail (Exchange Server)? I am a voice engineer, not a Citrix engineer, but in our environment, we have seen calls ring approx. 10 times and then an error pops up on the screen Lync Media Engine crash. In the logs it does not show a route to the Exchange server, but if calling unoptimized it goes to voice mail as normal. Also if calling from a Lync 2013 client registered to a Lync 2010 sever, it works fine.

I also see in the logs that the original call setup in the SDP is the Avistar as the user agent and Remote_SIP_User_Agent, but then it seems after that it is the Lync client (UCCAPI 4.0) as the user agent and Remote_SIP_User_Agent, then the Lync Media Engine Crashes after 10 rings, never getting to the voice mail server.

I don’t have a lot of info right now, since I primarily work on the VoIP side of the house, but I am trying to help out the Citrix engineer that is trying to resolve this issue.

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