I know this isn't a direct Lync question but I'm trying to set up faxing with my Lync server by avoiding the Lync server (as I migrate away from our old PBX) and have successfully done it at one of our sites that has all AudioCodes equipment (Mediant 1000 with FXS ports etc) but have another site that has a Dialogic 2000 that we need to use in conjunction with an AudioCodes MP-124. We route normal analog calls just fine through our Lync Mediation server from the Dialogic to the AudioCodes MP-124 but need to avoid that route with our fax machines as we need to use T.38 relay as that is much more reliable than the crazy hairpin turn method with G.711 that is so inconsistent. Anyway, I've got the route set and the two devices are talking just fine but when I try to call a fax machine for outside I get the following error on the MP-124 a few times in a row and the call just keeps ringing:

13:40:10.711 : 192.16.1.4 : WARNING : [Src=192.16.1.2/49575 Dst=6091 PType=6] ErrMgs=7 Invalid RTCP-XR packet:  Unsupported BlockType = 6
 [Code:3700e] [CID:1] [Time: 21:40:08]

Any thoughts? I'm waiting to get my support contract setup with AudioCodes for the MP-124 but thought I'd ask this knowledgeable crowd while I wait.

thanks

in advance

Steve

it looks like those error messages were a red herring. Further on there was a media mismatch error hidden away that was causing the issue. I change some more settings to match and calls now go both ways. Now to test to see if faxes will come through.

Steve

• Marked as answer by scarr4 Monday, February 25, 2013 11:44 PM

Hi,

Thanks for your sharing.

Hi Steve,

I'm trying to setup fax in Lync with the same equipment:  PSTN -> Dialogic 2000 ->Lync 2013.  This part is working, now I'm trying to add Audiocodes MP-114 for fax.  I wonder if you can share your config of the Dialogic and the Lync voice policy/route or a general overview of your setup on the analog part.

Much appreciated,  Joe. 

• Edited by Alekhan007 12 hours 36 minutes ago

well, there isn't much needed on the Dialogic side but to make sure the fax signalling method is T.38 (I'm assuming that is what you plan to use). Then it is a matter of setting up your routes correctly so any incoming calls for a fax go straight to the AudioCodes MP-114 and outbound fax calls from the MP-114 go out the phone lines and not to your Lync server (I'm also assuming you don't need your fax lines to route any calls to Lync. That is how I do things as no Lync end point would need to make or receive a fax call). From the Lync side you shouldn't need to do anything as no calls to\from faxes should cross the Lync threshold. So, that leaves the MP-114 part. You'll need to set all the signalling stuff to T.38 (there is a laundry list I'd need to track down but if you still can't get it let me know and I can try to give you the main stuff). Then just make sure your end points match what is coming in (if you are given just the 4 digits from your Telco then match on those (or if you want to be E.164 official you'll need your Dialogic route to append a +1(areacode)(Prefix) part on to make it standard and then have your end point match that. I know these are generalities but I thought I'd start there. Again, if you need more specifics let me know and I'll try to dislodge the info from my brain

Steve

Hi Steve,

I'm trying to setup fax in Lync with the same equipment:  PSTN -> Dialogic 2000 ->Lync 2013.  This part is working, now I'm trying to add Audiocodes MP-114 for fax.  I wonder if you can share your config of the Dialogic and the Lync voice policy/route or a general overview of your setup on the analog part.

Much appreciated,  Joe. 

• Edited by Alekhan007 Monday, April 20, 2015 6:45 PM