LTE Diameter Exchange offers the routing and signalling capabilities necessary to enable 4G roaming for your end-users. Our robust solution is the gateway to a new way of experiencing roaming,

data usage and additional services. Built over our IPX network, we provide redundancy, geographical diversity, reliability and scalability to safeguard your business and customers.

The solution to support international roaming for 4G networks with mobile operators worldwide

> Short time to market: Oneinterconnection and one contractto access multiple internationaldestinations, without the worry ofinteroperability issues.

> Global capillarity/coverage:Points of presence all around theworld which guarantee the best connectivity.

> Cost effective: Reduced operatingcosts and minimal upfrontinvestment required.

> Simplicity: Centralized DiameterRouting architecture.

> Seamless and ubiquitous:Complete interoperability amongstnetworks, regardless of technologyor location.

> Flexibility/scalability: Serviceadapted to technological evolutionto meet current and future needs.

> Security: Deployed on top of our IPXnetwork for additional peace of mind.

> QoS improvement for users:Customer roaming experience is thesame as at home.

Key Benefits

LSignalling - TE Diameter Exchange

Coverage

Service Features

> Diameter Proxy Agent: enables the routing ofDiameter messages based on the different parameters.

> Diameter Relay Agent: simplifies interworkingbetween different network elements.

> Hosted Diameter Edge Agent: optional functionalityto help operators expedite the launch of LTE roamingservices and reduce investment as a result of theprovision of a dedicated customer virtual DEA.

> SCTP Multi-Homing: enables multiple IP addresses toconnect to a peer device, ensuring reliable end-to-endmulti-path transmission.

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Geographic Redundancy: with 4 DRAs located in America and Europe. Enhanced Security: with signalling screening and topology hiding functionalities.

Service architectureOur LTE Diameter Exchange Service consists of a geo-redundant signalling network with four DRAs:

The LTE Diameter Exchange service offers worldwide coverage to over 500 destinations directly connected to our network or reachable through our agreements with our peer Tier-1 carriers.

The management of our customers’ signalling enables us to provide value added services and cover additional customer needs.

Miami

Boca Ratón

Madrid

FrankfurtAmerica

Europe

Welcome SMS

Marketing Campaigns Manager

Business Analytics

Steering of Roaming

Customer 1

Customer 2 Other Carriers

IPX Network

Roaming Partner

Roaming Partner

Roaming Partner

Roaming Partner

www. .telefonica.com @ elefonica

> Compliance with GSMA recommendations: support

> Extensive Value Added Service Portfolio: integrateseamlessly with Welcome SMS, Steering of Roamingor .