Cant set port on IP/PSTN Gateway


There are some really good resources available on how to setup SIP trunking between Lync and Microsoft Certified gateways (such as Sonus and Audio codes).

One of my favorite resources is from Iain Smith at NorthernLync found here

Problem

Unable to set the port to 5061 when adding a PSTN gateway in Lync Topology builder.
 
Notice how finish is grayed out and we have an error next to the port.

Cause

The reason we have this is because by default the mediation servers are set to use TLS and thus listening on port 5067 and TCP isn’t enabled. You can check this by expanding the Lync Server 2013 -> Standard EditionEnterprise Edition. Right click on the Front End where the Mediaiation service is co-located and select Edit Propoerties

Scroll down to the Mediation Server details to see the Mediation Server configuration


Solution

Simply enable TCP by checking the check box and set the port range


Returning to the PSTN Gateway folder in Topology builder and selecting New IP/PSTN Gateway you will notice that you are now able to add the gateway as TCP using port 5060
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About Paul B

My name is Paul Bloem and I am employed at Lexel Systems in New Zealand as a Principal Consultant for Unified Communications. I have been working on enterprise voice solutions for over 20 years. My first 10 years were spent working for a Telco in South Africa (Telcom SA). This is where all the groundwork happened as I was exposed to just about every aspect of telecommunication you could imagine. I develop an interest in PBX technologies and eventually became the go-to guy. Next, I had a 10 year run at Siemens South Africa, most of my time there was as a Technical Trainer. During this time VoIP hit the world stage, I had the privilege of introducing VoIP both as H.323 and later SIP across the Siemens HiPath 4000 solution stack. In 2008 I immigrated to New Zealand with my newly attained MCSE, I was ready to go where no PBX Techie had gone before. I was employed to explore OCS 2007 and that was pretty much the beginning of the end for me. I have been working on OCS and Lync ever since. My current role focuses exclusively on Lync and associated technologies.. That includes pre-sales, consulting, architecture and design, training and support. I even get to play in the development space from time to time - focus on play ;-) I was nominated as a Microsoft VTSP for Lync early in 2013 and also awarded Microsoft's MVP award for Lync in 2014.
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