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In this article, we describe the necessary steps to configure 

Overview

There are two types of 911 (emergency) calls, Basic and Enhanced:

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1. Launch Lync Server 2010 Configuration Manager.
   
   
2. Click Network Configuration on left pane.
   
   
3. Click Location Policy on right pane.
   
   

4. Edit the Global Location Policy as shown below.

   Panel
   borderStyle none
   Caption 0 Figure 1 Configure Location Policy

    

    

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1. Note
   Ensure to Commit the changes after configuring the attributes

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1. .

Dial Plan Configuration

To configure a dial plan:

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Create a Location Information Server (LIS) Subnet

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Location Policy Configuration

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SIP Profiles

1. In the WebUI, click the Settings tab.
   
   
2. In the left navigation pane, go to SIP > SIP Profiles > relevant SIP Profile.
   
   
3. In the MIME Payloads panel:
   1. Configure the ELIN Identifier field as shown below: as LOC.

   2. Configure the PDIF-LO Passthrough field as shown below:
      

      Caption
      0 Figure 1 SIP Profiles
      Image Removed

      Enable.

Number Transformation

This example uses two Transformation Tables to route calls to a 911 Provider over SIP trunking:

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For easy identification, the Description field matches the Scenario description you configured in Lync Setup. 

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• Click  to create a new Transformation Table. Configure the new table with with the following ELIN Identifier, Called Address/Number, and Calling Address/Number field types as shown below.: 

  Caption
  0 FigureTable 1 Transformation Table Entries - Calls to E911
  Input Field Type Input Field Value Output Field Type Output Field Value Match Type ELIN Identifier (.*) Callback Pool Identifier noEntries Mandatory (Must Match) Called Address/Number \+911 Called Address/Number 911 Mandatory (Must Match) Calling Address Number \+.#(\d{4}) Calling Address/Number +1510564\1 Mandatory (Must Match) Image Removed

  Note
  icon false
  Use the appropriate value for your location in the Calling Address/Number > Output Field Value field. The Output Field value "noEntries" is only an example. You could use a partial string match or a regular expression to catch all (.*).

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1. In the WebUI, click the Settings tab.
   
   
2. In the left navigation pane, click Transformation.
   
   

3. Click  to create a new Transformation Table. Configure the new table with with the following ELIN Identifier, Called Address/Number, and Calling Address/Number field types as shown below. :

   Caption
   0 FigureTable 1 Transformation Table Entries - 911 Fallback Calls
   Input Field Type Input Field Value Output Field Type Output Field Value Match Type ELIN Identifier (.*) Calling Name OtherLocations Mandatory (Must Match) Called Address/Number \+911 Called Address/Number 9911 Mandatory (Must Match) Calling Address Number \+.#(\d{4}) Calling Address/Number +1510246\1 Mandatory (Must Match) Image Removed

   Note
   icon false
   Use the appropriate value for your location in the Calling Address/Number > Output Field Value field.

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A Lync E911 entry is created in the Call Routing Table for routing calls from SIP to ISDN. For more information about Call Routing Tables, see Managing Call Routing Tables. 

1. In the WebUI, click the Settings tab.
   
   
2. In the left navigation pane, go to Call Routing Table.
   
   
3. Click the relevant Call Route table used for calls received from Lync.
   
   

Add two entries in the table: (see below for configuration):  one for calls with configured Office Location Information, and another one that does not have the Location Information as Office. Note that both route entries are destined to 911 Provider over a SIP Trunk.

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