1.IDD Overview IDD is Langsen termination service for international fixed and mobile voice operators. Offer TDM and IP-based voice services over 3G and 4G networks that span multiple operators Deliver managed voice services with strong QoS and CoS backed by an industry leading SLA The IDD solution provides A 24/7 customer support center, replying on centralized network supervision Flexible ways to interconnect IDD has managed QoS at various levels of performance Operators are free to select bi-lateral efficient multi-lateral modes of interconnection for different types of traffic 2.Data Roaming Service Date Roaming Overview Data roaming is using the internet on your phone when you’re abroad, whether it’s browsing the web or sending an email. Coverage across 52 countries and 107 operators Tailored for different categories of users with restricted usage packs and very different data allowance packs Langsen can support the requirement with Border Roaming solution, which identifies border roaming traffic and applies rerating, to ensure that calls in the relevant zone are charged at a differential IOT rate. 3.International Data Exchange Service Langsen also cooperates with some 3G mobile communications operators in Southeast Asia, to provide SMS, MMS, Data and video telephone services.