1. MoVoIX CSD 2005 mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 FINAL PRESENTATION

2. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 MOVOIX TEAM ME Afonso Timba Albertina NhamonequeDavid Blomberg Antonio Massingue

3. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 The Mozambique Voice Over IP and IX Extension Project 1 2 3 4 Background and Goals Internet Exchange Extension Encontro Voice over IP 5 Method 6 Q & A

4. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 The Goals Mozambique Internet Exchange extension 1 This project had 3 main goals Implement a Voice over IP solution in the UEM Intranet.. 2 Provide a mail server solution for national use. 3

5. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 Mozambique Overview Country Profile Capital: Maputo Population: 18.2 M (2002) Number of Internet Users (per 100 people): 0.15 Personal Computers (per 100 people): 0.30 Life expectancy: 38 years 170th in human development ranking Source: www.cto-ict.org UEM Number of employees: 2500 Number of students: ~9500 Most important national scientific pole 9 campuses in Maputo connected via wireless p2p links. Source: www.uem.mz

6. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 The Mozambique Voice Over IP and IX Extension Project 1 2 3 4 Background and Goals Internet Exchange Extension Encontro Voice over IP 5 Method 6 Q & A

7. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 Internet Exchange Extension  Importance of this goal  Time Service Solution  GPS time server  Advantages  Limitations  Particular case for VoIP Provide Mozambique with an open access solution for time synchronization service

8. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 Internet Exchange Extension  Mozambique Internet Exchange Overview  Preventive response for demands in a near future  Upgradable to support to Layer 3 Internet Exchange Upgrade Mozambique Internet Exchange with high scalable switch

9. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 The Mozambique Voice Over IP and IX Extension Project 1 2 3 4 Background and Goals Internet Exchange Extension Encontro Voice over IP 5 Method 6 Q & A

10. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 Mail Server Goal Install a free and high scalable nationwide mail server directed to Mozambican users Mail Service background in Mozambique  Most ISPs providing mail service, but...  Around 60.000 mail users Limitations in quality of service

11. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 Mail Server Previous Status Estimation of costs due to satellite internet links??

12. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 Mail Server Actual Situation Requirements? Challenges? Results? Characteristics: 100% open source 40.000 users, extension until more than 60.000 Spam filtering Virus protection agent SMPT authentication Instant signing-up Characteristics: 100% open source 40.000 users, extension until more than 60.000 Spam filtering Virus protection agent SMPT authentication Instant signing-up

13. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 The Mozambique Voice Over IP and IX Extension Project 1 2 3 4 Background and Goals Internet Exchange Extension Encontro Voice over IP 5 Method 6 Q & A

14. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 Mozambican Telecommunications Market Fixed telephony monopoly People migrate to mobile phones The Market VoIP is not regulated Telephony or data communication? Uncertainty – need for legislation UEM: non-commercial implementation The Law

15. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 VoIP Implementation To have an operational VoIP implementation in time for the conference in Maputo on the 11th of May Reduce telephony costs Stimulate the regulatory process Why?

16. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 VoIP System Components For call setup SIP Express Router – high capacity, moderate hardware requirements SIP Proxy Interconnect VoIP system with PBX or PSTN network E1 card + Asterisk – easy configuration, easy to implement additional features. PSTN Gateway User account management, rating of phone calls. Hans Eriksson’s system – availability of expert support BSS – Billing Support System

17. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 VoIP Challenges (1/3) Initial goal: Interconnect with the PBX The PBX not operational Solution: 1 line backup gateway Interconnect with the PBX Network with private IPs share a public IP Source IP put in SIP message. Port binding expiration NAT – Network Address Translation

18. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 VoIP Challenges (2/3) UEM Private Network

19. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 VoIP Challenges (3/3) Nathelper module in SER and PortaOne RTP proxy Rewrite private IP addresses in SIP messages Process RTP stream NAT Traversal Solution Scalability: only private IPs  all traffic goes via RTP proxy. Drawback Traffic in department stays in the subnet Change order of preferred codecs when traffic leaves subnet Solution

20. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 VoIP Implementation Working Voice over IP system Outcome Interconnect with the PBX Remaining work

21. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 The Mozambique Voice Over IP and IX Extension Project 1 2 3 4 Background and Goals Internet Exchange Extension Encontro Voice over IP 5 Method 6 Q & A

22. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 Method Phase Initial Research and Design Pre-implementation and testing Implementation April 4

23. mozambique voice over ip and ix extension http://csd.ssvl.kth.se/~csd2005-team3 The Mozambique Voice Over IP and IX Extension Project 1 2 3 4 Background and Goals Internet Exchange Extension Encontro Voice over IP 5 Method 6 Q & A