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AUTH1UserResourceIdentifier{userKey=8a00a02355cd1c2f0155cd26cb8305e9, userName='null'}
JIRAIDAUTHSYM-23175
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REV6UserResourceIdentifier{userKey=8a00a02355cd1c2f0155cd26cb8305e9, userName='null'}
REV3UserResourceIdentifier{userKey=8a00a02355cd1c2f0155cd26ce320b29, userName='null'}
REV1UserResourceIdentifier{userKey=8a00a02355cd1c2f0155cd26cc0e070f, userName='null'}

In this section:

Table of Contents
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In this article, we describe the necessary steps to configure configure 

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and  and Lync for Enhanced Emergency Services (E911) support.

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Figure

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1Topology

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Overview

In the context of Internet Telephony, there There are two types of 911 (emergency) calls, Basic and  and Enhanced:

  • Basic 911 calls contain no location information
  • Enhanced 911 calls do contain location information

When When Enhanced Emergency Services are  are enabled in Lync, location information about a 911 caller is passed to the destination (emergency services dispatcher, police, fire, etc.). 911 calls from Lync clients signed-in at an office location include location information, calls from Lync clients not signed in at an office location (e.g., Starbucks, public library, etc.) are connected to the destination using a fallback 911 route which does not contain location information.

Related Articles

Central Site Configuration

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To configure the location policy:

  1. Launch Launch Lync Server 2010 Configuration Manager.

  2. Click Click Network Configuration on  on left pane.

  3. Click Click Location Policy on  on right pane.

  4. Edit

    the

    the Global

    Location

     Location Policy as shown below.

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    1Configure Location Policy

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(warning) Make  Make sure to to Commit the  the changes after configuring the attributes shown above.

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To configure a dial plan:

  1. Launch Launch Lync Server 2010 Configuration Manager.

  2. Click Click Voice Routing on  on left pane.

  3. Click Click Dial Plan on  on right pane.

  4. Edit the the Dial Plan as  as required.

  5. Add a

    new

    new Normalization Rule

    for

     for 911 call as shown below.

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    1Configure Dial Plan

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(warning) Make  Make sure to to Commit the  the changes after configuring the attributes shown above.

Route Configuration

  1. Launch Launch Lync Server 2010 Configuration Manager.

  2. Click Click Voice Routing on  on left pane.

  3. Click Click Route on  on right pane.

  4. Edit the relevant relevant Voice Route and  and add a new new Pattern for  for 911 call.

  5. Be sure to have the relevant 

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    gateway

     gateway selected

    in

    in Associated Gateways

    field

     field as shown below.

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    1Route Configuration

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(warning) Make  Make sure to to Commit the  the changes after configuring the attributes shown above.

Trunk Configuration

  1. Launch Launch Lync Server Management Shell.

  2. Check the Trunk Configuration using using Get-CSTrunkConfiguration command command.

  3. Verify that that EnablePIDFLOSupport attribute is  attribute is True. If not:
    1. Run the the Set-CSTrunkConfiguration -EnablePIDFLOSupport $True script script.
    2. Press Press Enter.
    3. Verify that script script Get-CSTrunkConfiguration returns a EnablePIDFLOSupport attribute as  returns a EnablePIDFLOSupport attribute as True, as shown below.
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1Trunk Configuration

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Create a Location Information Server (LIS) Subnet

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To create a Location Information Server Subnet:

  1. Launch Launch Lync Server Management Shell.

  2. Type Type Set-CsLisSubnet -Subnet 134.56.105.0 -Description "Cubicle" -Location "Office" -CompanyName "Sonus" -HouseNumber "6900" -PreDirectional N -StreetName "Paseo Padre" -StreetSuffix "Pkwy" -City "Fremont" -State "CA" -PostalCode 94555 -Country US as  as shown below.

  3. Press Press Enter.

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1Create LIS Subnet

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Location Policy Configuration

  1. Launch Launch Lync Server 2010 Configuration Manager.

  2. Click Click Network Configuration on  on left pane.

  3. Click Click Location Policy on  on right pane.

  4. Edit the relevant relevant Voice Route.

  5. Select the the Enable enhanced emergency services check  check box.
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1Location Policy Configuration

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(warning) Make  Make sure to to Commit the  the changes after configuring the attributes shown above.

Sonus SBC

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Edge Configuration

The configuration steps on the Sonus SBC 1000/2000 are the 

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 are achieved directly via the WebUI broken down in the following sections:

 

Note

As an alternative, you can configure the SBC Edge using an easy configuration wizard, see Using Lync Setup for E911 Configuration.

 

SIP Profiles

  1. In the WebUI, click the the Settings tab tab.

  2. In the left navigation pane, go to to SIP > SIP Profiles > > relevant SIP Profile.

  3. In the the MIME PayloadsPayloads panel:
    1. Configure the the ELIN Identifier field as  as shown below:

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

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      1SIP Profiles

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Number Transformation

In this exercise we create This example uses two Transformation Tables to route calls to a a 911 Provider over  over SIP trunking:

  • Transformation for calls from Lync clients signed-in at at Office Locations Locations.
  • Transformation for calls from Lync clients signed-in at at Remote Locations  Locations such as Starbucks, etc..

Transformation Table for calls to E911

A Transformation entry is created for Lync E911, which includes table entries for Called Address/Number, ELIN Identifier, and Callback Pool Identifier (the emergency call back number table or Pasthrough ELIN number used for calls destined to 911). For specific information about the Passthrough ELIN Number, see Creating and Modifying Entries to Transformation Tables.

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

 

Tip

For instructions on creating and modifying transformation tables, see Managing Transformation Tables and its child pages.

 

  1. In the WebUI, click the the Settings tab tab.
  2. In the left navigation pane, go to click Transformation.Create a new Transformation Table with

  • Click (plus) to create a new Transformation Table. Configure the new table with ELIN Identifier, Called Address/Number,

...

  • and Calling Address/

...

  • Number field types as shown below.

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  •  

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    1Transformation Table - Calls to E911

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  • Note
    iconfalse

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

    The Output Field value "

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  • noEntries" is only an example.

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  • You could use a partial string match or a regular expression to catch all (.*).

Transformation Table for 911 Fallback calls

  1. In the WebUI, click the the Settings tab tab.

  2. In the left navigation pane, go to click Transformation.

  3. Create a new Transformation Table with Click (plus) to create a new Transformation Table. Configure the new table with ELIN Identifier, Called Address/Number, and and Calling Address/NumberNumber field types as shown below.

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  1. .

     

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    1Transformation Table - 911 Fallback Calls

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    Note
    iconfalse

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

Call Routing

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 the Settings tab tab.

  2. In the left navigation pane, go to to Call Routing Table.

  3. Click the relevant relevant Call Route table  table used for calls received from Lync.

Add two entries in the table: 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

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Provider over a SIP Trunk.

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1Call Routing

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Note that when integrating with E911 providers, the Call Priority may have to be set to Emergency.

Call Flow

With above In the example configuration, when a 911 call from Lync client arrives on the Sonus SBC 1000/2000 with the Location Information as the 

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 with the Location Information as Office, Lync will then provide the relevant location profile in the Inbound INVITE message. Sonus SBC 1000/2000 then passes this information to the the 911 Provider in  in the outbound INVITE message.

This can be verified verified in the logs by  by tracing the relevant inbound INVITE message from Lync to Sonus SBC 1000/2000:the 

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:

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1Tracing Relevant Inbound INVITE Message

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