I am facing issue from one of my location about audio calls, when any one is present on my HO so I am able to do audio call but same user using internet that time audio call not connect given error "call fail due to network connectivity" our network team says traffic got pass and firewall team also commit same.do not understand how to resolve this issue please help me..

Your AV ports on the Edge are likely not open properly, or something is wrong in your topology.

Ensure that your workstations can resolve the name of the edge pool, and can connect to the internal edge IP address on TCP/443 and UDP/3478.  Ensure that the external edge A/V interface can communicate inbound and outbound to the Internet on ports TCP/443, UDP/3478, TCP/50000-59999, and UDP/50000-59999.  Make sure the NAT is bi-directional, meaning that the public IP that's NAT'd to your AV interface inbound is the same IP traffic appears to come from as it leaves the AV Interface headed to the Internet.  Finally, in your topololgy builder, if you're using NAT, make sure the AV Edge's public IP is specified in your topology builder.

Check out this article for port info: https://technet.microsoft.com/en-us/library/gg398739.aspx

And this one which references the topology and hard coding the NAT'd IP: https://technet.microsoft.com/en-us/library/gg398591.aspx

Hi sachypawar,

Agree with Anthony.

You can refer to the Lync Server 2013 Protocol Workloads Poster to check if the required posts are opened on the firewall.  

http://www.microsoft.com/en-us/download/details.aspx?id=39968

Best regards,

Eric

Hi Anthony,

thanks for your revert. I want to identify where is the issue. yes I understand its port blocking issue UDP ports are block that's way this issue comes. all team our network and firewall team saying ports are open so I want to show both the teams with proof what ports and where its block...what to do?

thanks Eric

but I want to know exactly where its block? with print screen I want to show the team.. issue with your firewall because no agree with my words.

please help me

Dear sir,

how I trouble shoot this issue. AV Edge public IP is mention in topology, how I trace this my all other location working fine we do not face any issue with other location but only specific location facing issue..

please revert I need help

Hi sachypawar,

If you can hava A/V call with the users of other location, looks like that it is not a firewall issue.

To troubleshoot this problem, the best way is to enable Lync client logging and use snooper to analyze it.

Best regards,

Thanks

I did that but can you guide me how to read that with snooper and I require only client log or same time I run Lync diagnostic tool in FE server also.

You may need to check out this.

http://blogs.technet.com/b/nexthop/archive/2012/04/16/troubleshooting-lync-server-2010-with-snooper-part-1.aspx