2. 1999-09-30EUC'991 A SIP-ISDN Gateway Hans Nilsson CSLab Ericsson Utvecklings AB hans@erix.ericsson.se

3. 1999-09-30EUC'992 What is SIP ? zSession Initiation Protocol, RFC 2345 zInitiating, Changing and Terminating Multimedia conferences (IP Telephony) zLightweight zTextbased ”Looks like HTTP” zUDP (TCP)

4. 1999-09-30EUC'993 Future of SIP? zEasy to implement => many small companies zMail servers, HTTP Servers, SIP servers yhans@cslab.ericsson.se  sip:hans@cslab.ericsson.se zWeb integration; Services on web pages yClick-to-dial

5. 1999-09-30EUC'994 SIP, Simple Example INVITE 200 OK ACK Audio, video,... BYE 200 OK

6. 1999-09-30EUC'995 SIP Redirect Server Example INVITE 200 OK INVITE 200 OK 302 Redirect REGISTER

7. 1999-09-30EUC'996 SIP, Other Example REGISTER

8. 1999-09-30EUC'997 What is a Gateway? Audio

9. 1999-09-30EUC'998 SIP/ISDN Gateway Signalling Gateway Media Gateway Controller Media Gateway ISDN SIP RTPPCM

10. 1999-09-30EUC'999 SIP stack SIP stack SIP stack SIP stack SIP - ISDN ISDN stack ISDN stack Encode Decode Resending TCP UDP Message support SNMP HTTP State machine

11. 1999-09-30EUC'9910 Erlang code sizes in number of source lines

12. 1999-09-30EUC'9911 SwitchBoard SIP/ISDN Gateway - realisation IP Network IPI 100BaseT RTP 4 x E1/T1 ISDN Network PCI ISDN DSS1 SIP 10BaseT IP Network Distributed Erlang

13. 1999-09-30EUC'9912 Why Erlang/OTP?

14. 1999-09-30EUC'9913 z Hot code upgrade z External interfaces z Components/Libraries: yMnesia ySASL ySNMP yInets yGS y... zConcurrency ylightweight processes zDistribution ytransparent message passing zRobustness ynode fail-over yprocess monitoring zSoft real-time Some characteristics [ http://www.erlang.org/white_paper.html ]

15. 1999-09-30EUC'9914 Users

16. 1999-09-30EUC'9915 Mobility Server VoIP Prototype Configuration NT Server: Mobility Server Feature ISDNSIP H.323 DECT SWB PLMN PTN IPI RE H.323 IP H.323 SIP Wireless LAN Feature PSTN TNI

17. 1999-09-30EUC'9916 Show Inter-operability between IP Terminals and DECT Terminals or PSTN Identify effects from implementing existing Mobility Server services over VoIP Create qualified arguments on SIP versus H.323 for the Mobility Server product Mobility Server VoIP Prototype Objectives

18. 1999-09-30EUC'9917 The Future

19. 1999-09-30EUC'9918 Future: Work, work, work... zStandard MG protocol (MGCP,…) zLess prototypish :-) zAdministration: ySNMP yHTTP/CGI zConnect to Ericsson Phone Network

20. 1999-09-30EUC'9919 Redundancy and Capacity SwitchBoard IPIPCI SwitchBoard IPIPCI SwitchBoard IPIPCI “ Eddie ” SIP “ Eddie ”