1. Andmeside IRT 0030 loeng 1116. nov. 2005 Avo Ots telekommunikatsiooni õppetool raadio- ja sidetehnika instituut avots@lr.ttu.ee

2. Kokkuühendamine ATM Networks IWF PSTN/ISDN Rec. Q.2931, PNNI Frame Relay Networks IP-based Networks Rec. Y.1310 IETF RFCs IWF Rec. I.555 Rec. I.580 Rec. Q.931 ATM OSF & NM, M series Rec. SNMP based FR OSF & NM PSTN/ISDN IWF SS7 Network Rec. I.580 Rec. Q.700 series Wireless access IWF

3. Võrkude ühiskasutus Ethernet Adhoc Network Adhoc Network cdma2000 1x operator 1 cdma2000 1x operator 2 GPRS Edge WLAN Web Server IP Network IP Network

4. Võrguliikluse jaotus

5. What is SIP? Session Initiation Protocol  protocol that establishes, manages (multimedia) sessions –also used for IM, presence & event notification –uses SDP to describe multimedia sessions Standardized by IETF, 3GPP (for 3G wireless), PacketCable

6. Building Applications On Sip Applications for example instant messaging can be built on SIP. Such applications are quick to write with any SIP toolkit and are easily extensible. User agent Proxy server Proxy server User agent ACK OK invite OK ACK invite OK ACK LDAP server LDAP server lmn@tech.net--lmn@tech.net--> 138.47.19.103

7. SIP trapezoid outbound proxy a@foo.com: 128.59.16.1 registrar

8. Session mobility Walk into office, switch from cell phone to desk phone –call transfer problem  SIP REFER related problem: split session across end devices –e.g., wall display + desk phone + PC for collaborative application –assume devices (or stand- ins) are SIP-enabled –third-party call control

9. Why Phone NUMBERS? Users should not be burdened with device addresses, when it’s people they really care about Addresses should be mnemonic and empower enterprises to manage the identities of their users sip:dbaron@mit.edu It’s time to put E.164 phone numbers behind us! A.G. Bell did not say: “+1-617-252-1232, come here. I need you!”

10. SIP Proxy DNS SIP-PBX Gateway PBX INVITE (sip:bob@bigu.edu) INVITE (sip:12345@gw.bigu.edu) DNS SRV query sip.udp.bigu.edu telephoneNumber where mail=”bob” PRI / CAS bigu.edu Campus Directory SIP User Agent Bob's Phone SIP.edu Architecture (Phase 1)

11. DNS INVITE (sip:bob@bigu.edu) DNS SRV query sip.udp.bigu.edu bigu.edu SIP User Agent SIP.edu Architecture (Phase 2) location DB If Bob has registered, ring his SIP phone; Else, call his extension through the PBX. REGISTER (Contact: 207.75.164.131) INVITE (sip:bob@207.75.164.131) SIP Proxy SIP Registrar Bob's SIP Phone

12. PBXPSTN SIP/PRI Gateway SIP.edu Configuration SIP Server Campus Network Internet DNS Server LDAP Server

13. PBXPSTN SIP/PRI Gateway DNS SRV Lookup SIP Server Internet DNS Server DNS SRV LDAP Server Campus Network

14. PBXPSTN SIP/PRI Gateway SIP INVITE SIP Server Internet DNS Server SIP LDAP Server Campus Network

15. PBXPSTN SIP/PRI Gateway LDAP Lookup SIP Server Internet DNS Server LDAP LDAP Server Campus Network

16. PBXPSTN SIP/PRI Gateway Call Sent to PBX Gateway SIP Server Internet DNS Server SIP LDAP Server Campus Network

17. PBXPSTN SIP/PRI Gateway Media Stream via Gateway to PBX SIP Server Internet DNS Server RTP LDAP Server Campus Network

18. PBXPSTN SIP/PRI Gateway SIP.edu Configuration SIP Server Internet DNS Server LDAP Server Campus Network

19. PBXPSTN SIP/PRI Gateway SIP to PBX and PSTN Calling SIP Server Internet DNS Server LDAP Server Campus Network

20. PBXPSTN SIP/PRI Gateway PBX and PSTN to SIP Calling SIP Server Internet DNS Server LDAP Server Campus Network