1. 103 Sidevõrgud IRT 0020 loeng 8 18. okt. 2005 Avo Ots telekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst. avo.ots@ttu.ee

2. 104 Kvaliteeti mõjutavad parameetrid Kriteeriumid MOS>=4,0 saavutamiseks -Ühesuunaline hilistumine <= 150 ms -Paketikadu G.711 korral <= 0,5% -Hilistumise varieeruvus <= 40ms -Kõne kodeerimine Võimaluse korral kasutada G.711

3. 105 Traditional Enterprise Telephony and Data Network  Class features (Auto Attendant, Background Music, Answer groups, Call Forward, Call Waiting, Calling Name, Speed Dial, Conferencing, Voice Mail...)  Parallel Data Network (Managed Network or Open Internet) Enterprise VoIP Networking PSTN IP Network PBX Head office Branch

4. GateKeeper MCU H.323 Clients INTERNET H.323 Videoconferencing H.320 Gateway ISDN

5. 107 Remote Extension  Lower investment  Provide enhanced PBX services to remote employees  Simple entry-level application  Avoids PSTN charges for calls to the remote office

6. 108 PSTN MediaPack IP Head Office IP PBX Extension IP PBX IP Phone

7. 109 PSTN MediaPack IP Head Office MP-124 Branch Office IP PBX Extension IP PBX IP Phone MediaPack Branch Office Lifeline MediaPack Branch Office MediaPack Branch Office PBX

8. 110 Gatekeeper Functionality Services: –Gives access to multipoint conferences and gateways Neighbor Gatekeepers: –Provides inter-zone communication Network Topology: –Allow administrator to employ traffic shaping Endpoints: –Live list of registered users Call Control: –Live list of active calls

9. 111 Client Authorization Open Gatekeepers –anyone can register Predefined Endpoints LDAP Authenticated Endpoints

10. 112

11. 113 MGCP