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Contents

 Contents...... 1

 Introduction...... 2

 Background...... 2

 Benefits...... 2

 Client and Server Support for Location-Based Routing...... 3

 Illustrations...... 3

 Process for approval of telecom system...... 4

Location-Based Routing in Lync 2013 | Page 1 Introduction Why We Need Location Based Routing? In the present scenario we will not be able to use the Lync Enterprise Voice feature in the countries where have telecom regulations. That requires Voice traffic over the Enterprise Data Network and the Public Switched telephone network, must be strictly separated and there should be no mixing between the two network calls.

To overcome present Scenario, MICROSOFT came up with LOCATION BASED ROUTING FOR LYNC SERVER 2013 concept. It is designed to comply with regulations that restrict IP-to-PSTN routing. Also, it routes the PSTN calls based on the location of the caller to prevent toll bypass. This is scoped to specific locations, gateways, and users.

What is Location Based Routing? LBR Routes the call to the gateway closest to the calling party by minimizing the use of WAN and enables to be in compliance with regulations that do not allow toll bypass

Background MICROSOFT had “Least Cost Routing” a great feature! Least Cost Routing routes the call to the gateway closest to the called party with Minimum toll charges (toll bypass) and prioritize the use of the WAN. But this feature could not be completely utilized in certain countries due to their telecom regulations. Whereas MICROSOFT LOCATION BASED ROUTING FOR LYNC SERVER 2013 concept can be used in these countries complying with regulations that restrict IP-to-PSTN routing.

Benefits  Location based routing helps to use the Lync enterprise voice feature in the countries where we have the telecom regulatory restrictions  Location-Based Routing introduces a new set of rules that modifies the routing of national and international PSTN calls to prevent toll bypass (Toll bypass means, calls can hop off a Public Switched Telephone Network (PSTN) gateway closest to the location of the person being called).  Location-Based Routing provides the flexibility to scope these rules to specific regions, specific gateways or to specific set of users only.  Any place where you have lots of roaming users going to different offices can benefit from location-based routing, especially in environments where home internet bandwidth is low

Location-Based Routing in Lync 2013 | Page 2 Client and Server Support for Location-Based Routing  Lync Server Support for Location Based Routing

Support Pool Version Mediation Server Version ed

Lync Server 2013 February 2013 Lync Server 2013 February 2013 Yes Cumulative Update Cumulative Update Lync Server 2013 February 2013 Lync Server 2013 No Cumulative Update Lync Server 2013 February 2013 Lync Server 2010 No Cumulative Update Lync Server 2013 February 2013 Office Communications Server 2007 R2 No Cumulative Update Lync Server 2013 Any No Lync Server 2010 Any No Office Communications Server 2007 R2 Any No

 Client Support for Location Based Routing

Support Client Type Details ed Including Lync 2013 February 2013 Lync 2013 Yes Cumulative Update Lync 2010 Yes Office Communications Server 2007 R2 No Lync Phone Edition Yes Lync Attendant Yes Lync for Windows 8 No VoIP must be disabled for Lync Mobile Lync Mobile 2013 2013 clients if used by users with Location- No Based Routing enabled. Lync Mobile 2010 Yes

Illustrations Let’s consider that we have a global organization which has 3 offices located in 3 different locations India, US & UK. Lync is hosted in US and all the location are connected through MPLS and all these office have their own PSTN Gateways.

Scenario 1: When LBR is not implemented When a DK user with DK dial plan and voice policy calls an IND PSTN Number/User the call will reach the DK PSTN Gateway and get routed to the PSTN Cloud and reaches the IND PSTN User.

Location-Based Routing in Lync 2013 | Page 3 Scenario 2: When LBR is not implemented When a DK user visits the IND Office and tries calling an IND PSTN Number/User the call will reach the WAN Public network and goes out to the DK Office and reaches the DK PSTN gateway then followed by the PSTN Cloud and connects to the IND PSTN User.

Scenario 3: When LBR is implemented When a DK user visits the IND Office and tries calling an IND PSTN Number/User the call will reach nearest PSTN Gateway (i.e. IND PSTN Gateway) and goes to the PSTN Cloud and connects to the IND PSTN User.

Denmark INDIA Public Network MPLS MPLS Public Network US DK User

US User PSTN Gateway

IND User PSTN Gateway

10.91.X.X 10.1.X.X INDIA IP

PSTNPSTN US IP PSTNPSTN

US PSTN User IND PSTN User MPLS

PSTNPSTN

PSTN User

Denmark DK IP DK User PSTN Gateway 10.45.X.X Scenario 1 Call Flow Scenario 2 Call Flow

Scenario 3 Call Flow Call out to PSTN Process for approval of telecom system  Each deployment has to be certified by Telecom Regulatory Authority of India (TRAI) once completed and test cases have to pass to comply with local regulation  90+ calling scenarios need to be tested  Testing scenarios and LBR will be offered to the service providers to test themselves  Microsoft has deployed and received certification of our implementation

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