1. www.inswitch.us Erlang UC - Stockholm, November 2005

2. Participants Eduardo Figoli – eduardo@inswitch.us Bernardo Paroli – bernardo@inswitch.us Carlos Silva – carlos@inswitch.us

3. Established as a corporation in the State of Florida, USA. Development Center is located in Montevideo, Uruguay. Additional business and support offices in Asia and Latin America. Support centres at Guatemala, Paraguay and Uruguay. Provides turn key solutions as well as technology building blocks (system modules) to system integrators, fixed and mobile operators. INSwitch Solutions

4. IN Switch Solutions Erlang installations Bolivia Guatemala Honduras El Salvador Paraguay Palestine Pakistan Jordan Uruguay

5. Mobile eTopUp Customers purchase prepaid air time at retailer’s mobile agents using a standard mobile handsets as the distribution device Fixed or variable amounts Eliminate PIN hidden numbers generation errors and terminals costs Guarantee stock supply in the distribution network increasing availability

6. Retailer places a recharge transaction using his mobile phone. USSD technology offers WAP style text. The credit is automatically loaded into subscriber prepaid account. Since no POS are needed, non traditional retailers can take part of the system expanding the solution while reaching more customers. Online transactions are faster and more secure since Operator’s Signaling channels are used. eTopUp with USSD

7. eTopUp with POS Terminals Advantages Low operational costs Reduces Fraud Allows multiple voucher denominations Disadvantages High set up costs Transaction (phone line) costs Requires training Low penetration Requires PIN management Use of IVR resources POS Terminals at retail stores are used for printing PIN numbers. Vouchers are loaded in bulk in the terminal and printed out when required. VISA II protocol

8. Millicom mobile operators in Guatemala, El Salvador, Honduras, Paraguay and Bolivia, under the branded name TIGO launched ePIN (Inswitch’s eTopUP Platform) in August 2005. 2 Centralized platforms: One in Guatemala attending Guatemala, El Salvador and Honduras One in Paraguay attending Paraguay and Bolivia TIGO Case Study

9. Integration with: Ericsson and Motorola MSC/HRL Logica and Comverse SMSC Comverse Prepaid integration through SOAP and propietary protocols Billing and Banking through provided protocols TIGO Case Study

10. App server1 App serverN CDR server Mnesia DB TIGO Case Study Agent Mobile USSD Menu Subscriber SMS confirmation USSD SMS confirmation CDR

12. Yaws Web Server Pages – agent information

13. Yaws Web Server Pages – money transfer

14. Yaws Web Server Pages – top up

15. Erlang/OTP and eTopUp Applications Program structure – processes behaviours (supervision, gen_fsm, …) Directory structure Node release

16. HW and SW technology used Hardware: Servers HP DL 360 Pentium IV 3.2 GHz with 2 GB RAM Telesoft NS700 signaling card Software: Windows 2000 Server Erlang 5.4 (release R10B) licensed

17. Why Erlang? 1.Light weight processes 2.OS independent (Windows / Linux) - portability 3.Fault tolerance mechanisms (supervision, 99.999,...) 4.Hot code loading 5.Distributed environment and DB 6.Support from Ericsson and live Erlang community

18. Advantages: 1.Mnesia DB stores Erlang data types 2.Easy management of a huge number of processes 3.Low cost implementation 4.Erlang OTP framework 5.Robust and scalable distributed software 6.Easy programming language and fewer lines of code

19. Not so good: 1.Non standard SQL interface to Mnesia 2.Needs more memory and processor power 3.Erlang SSL port (ssl_sock) with Yaws not working properly under Windows 4.No IDE and easy graphical debugger

20. Some of our products Land and Wireless Prepaid Platforms Calling Cards Platforms Prepaid Roaming Location Based Engines USSD Gateways SMSC Graphical Service Creation (IVR, SMS, USSD) Convergent VAS GPRS Charging Ring Back Tones Welcome Roamers Missed Call Alert Virtual HLR

21. Inswitch Erlang Team 1.Inswitch has a team of about 10 members speciallized in Erlang since 2002 2.We are thinking of increasing the team number

22. Please visit us at www.inswitch.uswww.inswitch.us Thank you !!