Mediant 800 SBC using PRI trunk  to LYNC 2013

Posted on 2014-12-15
Last Modified: 2014-12-16
Have been tasked with configuring a Mediant 800 E-SBC from Audio Codecs, to do the transcoding for a Lync Deployment.
The Mediant 800 E-SBC will be using PRI, and acting as the PRI trunk for the lync server.

Does anyone on the exchange have any experience with this?

I have the Trunk in an active - OK state, but cannot find any documentation on using this device to go from PRI to Lync 2013,
although there is endless documentation on configuring SIP trunk to Lync 2013, nothing on PRI trunk to Lync 2013.

Really, any help would be useful!
Question by:paulrausch
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Expert Comment

by:Mohammed Hamada
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The PRI shouldn't have anything to do with Lync directly! Lync only talks IP/SIP and should be connected to the Audio codes only through IP (Network).

PRI connects to your PSTN line or the TDM PBX for hybrid configuration. what's your current telecom infrastructure? do you have any PBX in place?

What do you currently have from the Operator or your ITSP company?

Author Comment

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ITSP company. The audio codes will be connecting directly to the network and communicating with Lync over TLS/UDP.

From the ITSP is a t1 line, they have on premise equipment that is sending PRI to the Audio Codes.
I've been able to find several configuration guides which I'm using in tandem to try to get this working.

Thank you for your reply. I'm more or less looking to see if someone has used this configuration before.

telecom is AT&T who was able to provide the PRI settings. PRI is going into PRI port on the Audio Codes.
I've gotten the digital trunk up and running, and in an active state with no errors. The only issue is attempting to get a working configuration.
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Accepted Solution

Mohammed Hamada earned 500 total points
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Ok in your case here's what I would do.

1- Setup the AudioCodes's LAN IP to talk to Lync server (Front end if mediation service is collocated) or to Mediation server (If dedicated).
2- Add Audiocodes local IP to Lync topology on port 5060 (TCP or TLS) and publish the changes.
3- Configure normalization rules on Lync server.
4- Enable couple of users for Enterprise Voice and setup their Tel URI.
5- Configure Normalization rules on Audio codes.

You can first configure Audiocodes normalization rules and leave Lync normalization set as it is to get all calls passing through then set it up later when ur sure everything is working between the ITSP and Audiocodes.

6- Test External/Incoming calls between Lync and PSTN and vice versa.

Lync doesn't talk UDP it only works with TCP or TLS.

Here's the configuration for your gateway for Lync 2013 from scratch.

Author Closing Comment

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This is precisely what I was looking to find, but was unable to locate. Thank you so much very much your assistance, greatly appreciated.
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Expert Comment

by:Mohammed Hamada
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Your welcome, glad I could be of help.

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