Hello everyone.  We have a couple of networks where we run into this issue, so far its only happened with clients using CME 9.0 and Lync 2010.  Sometimes, and it's never system wide, when a caller makes an outbound call out of the system, the call is immediately placed on hold.  You can then resume that call with no further issues but its a bit annoying.

So far the most reliable, but temporary, fix has been to reboot the affected user's PC and outbound calls work normally for a while again.

Has anyone else run into this or seen something like this?

As some further information I've done some packet tracing on the Lync server to see if I can sniff out whats going wrong.

I see two SIP requests from CME to Lync sending an "Established Event" then I see two corresponding replies from the Lync server in which it responds "OK".  After this I then see Lync send the CME a "Hold Call request" but no clear indication of why.  From what I've read on the forums this is known behavior and usually results from Lync receiving something it doesn't understand from the PBX.  However, I can't tell from looking at the packet captures what the issue is between Lync and CME.

I've attached some screenshots of the message body of the SIP packets sent between the two devices

Hi,
Please make sure all configuration settings are correct.
http://jamesbotham.wordpress.com/2011/05/14/integrating-lync-2010-enterprise-voice-with-cisco-call-manager-express-or-uc500/
Regards,
Kent

 

Hi caholloway,

Is there any update on the issue?
Regards,
Kent

Kent,

I've so far only found a temporary fix.  If I remove the user from the Lync server and then readd her with the same settings the issue stops for a while.  The issue just reoccured today so it stayed fixed for about a month.  (I worked on this for a while before posting here)

Obviously there is some underlying problem here with Lync.

I checked all the settings listed in the blog a number of times for another issue we are having.  I don't think its a configuration issue as only one user is having the problem and she is configured in the same way everyone else is.  The only difference I can tell between her and everyone else is that she is the receptionist and has a different model phone and a sidecar attached to this phone (Cisco 7975)

What kind of integration are you talking about here? plain sip call from Lync to CME, or some other kind of integration?

If this only appear at some useres, it is definatly something in their setup/profile which might cause the error. But I think we would need some more details first.

We're doing RCC over SIP between CME 9 and Lync. I can provide any relavent portions of the config you might need.

The issue only affects a single user.  I double checked the user's config in both Lync and CME.  The only think that differed between her setup and that of all of the other users in the organization (I guess I should say that I did not dig into her AD profile) was that in CME she had a secondary number associated with her extension.  I removed this secondary number and added it as its own DN with a cfwdall to her main DN.  I'll keep monitoring the situation and update the thread as I know more.

In the meantime if you have suggestions as to other things to check, I'm happy to receive some input.  Lync integration is somewhat new to me so I'm eager to learn what I can.

Interresting, I have only deployed RCC through CUPS. There was no documentation on RCC on the Cisco web. Are you sure it is fully supported yet? You might be fighting new ground here.

A quick question: Hos is the lync user configured: RCC and audio, or just RCC (Disabling av in Lync)

How have you configured teh URI, Have you specified the phone device, or not. I reccomend using a string like this: tel:xxxx;phone-context=dialstring;device=SEP0002FD3BB5C to avoid any issues with lines shared across different devices.

I'm sorry if this a little is off-topic, but I would really like to know how RCC is working directly with CME without the CUPS server, as I have been trying to get this to work for weeks without success.

Delpt,

I didn't do the initial configuration so I probably can't speak to you about the details of installation but the link that Kent provided above outlines the process pretty well.

Lasse,

I'm pretty sure there is not yet full support, I have no idea if there ever will be.  There are a few guides online but mostly it seems to be blog posts of other users, nothing from MS or Cisco.  The user is configured for RCC and audio.  Basically the only audio feature being utilized here is the automatic volume adjustment when a call connects.  All of this works very well throughout the organization.  The one affected user is the receptionist and Lync continues to function properly even when the issue is occuring, it just automatically holds any outbound call.  She can then just hit resume on her phone or Lync and continue the call normally.

I've actually had this same issue happen here at my office as well but when it happens to me 9 times out of 10 its that Lync didn't properly end the previous call and I can see the call control window of the improperly ended call and close it manually to resolve the issue.  However, when the client i'm working on this for has the issue there is no such call evident and the only solution is to remove her from the Lync server and re-add her.

As mentioned previously I found she had a secondary number attached to her DN in CME (this was the only CME side difference I could find) but removing this did nothing for the issue.

The Link Kent provided, is for normal call routing over SIP. It is not an RCC article.

RCC require a presence server of some sort (at least in CUCM 5, 6, 7 and 8). And I have not seen any articles for RCC for CME as you are requesting. I must admit I have not gone through all the 9.x documentation yet, but there is nothing official on the matter yet.

These posts cover a lot of integration scenarios:

http://tech.rundtomrundt.com/2011/03/lync-in-coexistence-with-cucm-part-1.html
http://tech.rundtomrundt.com/2011/03/lync-in-coexistence-with-cucm-part-2.html
http://tech.rundtomrundt.com/2011/03/lync-in-coexistence-with-cucm-part-3.html
http://tech.rundtomrundt.com/2011/07/lync-in-coexistence-with-cucm-part-4.html
http://tech.rundtomrundt.com/2012/03/lync-in-coexistence-with-cucm-part-5.htm

Hi

That's great to read that the RCC mode works with CME. Can you send me how you have configured the CME and the Lync server ?

Many thanks in adavnce

Patrick

For those that want to do this, I just posted a guide for RCC integration between CME and Lync.