How to setup simultaneous ring (simring) with Mitel Extension and and Lync Enterprise Voice:

Author: Habib Mankal
Editor: Curtis Johnstone




The below document explains on the setup and configuration of simultaneous ring (simring) between a Mitel extension and a Microsoft Lync enterprise voice user. Before beginning the steps below to configure simring you will need to have previously setup a sip trunk from the Mitel MCD to Lync Server 2013 as per Direct SIP Integration between Mitel Communications Director (MCD) and Microsoft Lync Server 2013.

To enable simring from a Mitel extension to Microsoft Lync, the configuration below assumes your Microsoft Lync Enterprise voice users have been setup and configured, the configuration shown is all completed on the Mitel MCD.

Reference Topology

The step-by-step instructions in this article reference a high level topology similar to the one shown here:


Mitel Configuration

This section details what needs to be configured on the Mitel MCD v6 IP-PBX to achieve simring communications with Microsoft Lync 2013 enterprise voice.

Configuration and Licensing

The first step is to ensure there are available licenses for External Hot Desk Users in the Mitel IP-PBX.

Login to the MCD web administration tool as shown here:


Then select System Administration Tool as shown here:


Once you’re logged into the MCD from the left hand menu select Licenses -> License and Option Selection form and ensure that you have available External Hot Desk Users License as this example shows:


Class of Service

A Class of Service needs to be configured to provide permissions for the simring call from a Mitel extension to Microsoft Lync.

Click System Properties -> System Feature Settings -> Class of Service Options as shown here:



Select a free Class of Service and Click Change. Give an appropriate name for this Class of Service (e.g. EHDU2Lync). There are a lot of different options in this form however the below options are the only ones that need to be configured; ensure the values are set to those shown here:



User and Device Configuration

We need to create a virtual extension on the MCD and associate the Lync Enterprise voice number to it so that when someone dials the virtual extension the call is then sent over to the Lync Enterprise voice number.

From the left hand menu click on Users and Devices -> User and Device Configuration -> Click Add, Select Default user and Device.Configure the Profile tab as per the below:

User Profile:

· Last Name: Provide a meaningful last name

· First Name: Provide a meaningful first name

Service Profile:

· Number: Enter a unused extension number

· Hot Desking User: Check the box

· Preferred Set: automatically changes to No Device

· Service Level: Full


Configure the Services Details tab as per the below:

· Class of Serivce: Enter the class of service you created above

· External Hot Desking Enabled: Yes

· External Hot Desking Number: Enter the Lync Enterprise Voice Number you have already associated to your Lync user.

· Click Save.


Personal Ring Group

Personal Ring Groups (PRG) are an association of two or more devices for a single user under a common Directory Number (DN). The devices ring simultaneously (Ring All) when called. The typical scenario is a person’s desktop phone, Lync Enterprise Voice number, cell phone etc are twinned together, where the desk phone is considered the primary extension, which is referred to as the pilot number or prime member. Other group members are referred to as non-prime members.

From the left hand menu click on Users and Devices -> Group Programming -> Personal Ring Groups

We are going to create a PRG for extension 1001 in our configuration and then associate the Lync Enterprise voice virtual extension to it. Click Add.

Personal Ring Group: Enter the primary extension number (DN) you want to simultaneously ring. Click Save.


Next we are going to associate the virtual extension number as a member of this new PRG. Personal Ring Group Members click Add Member

· Number: Enter the virtual extension number you created above in users and devices.

· Presence: Ensure that Present is selected , if you select absent it will not simring the Lync Enterprise Voice Extension

· Click Save



From another Mitel extension dial the primary number of the extension you have just setup to simultaneously ring the Lync Enterprise voice, you should now see the Mitel Extension and Lync Enterprise Voice user ring at the same time.

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