Sidevrgud IRT 0020 loeng 8 18. okt. 2005

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SidevõrgudIRT 0020loeng 8 18. okt. 2005

• Avo Otstelekommunikatsiooni õppetool,
• TTÜ raadio- ja sidetehnika inst.avo.ots_at_ttu.ee

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Kvaliteeti mõjutavad parameetrid

• Kriteeriumid MOSgt4,0 saavutamiseks
• Ühesuunaline hilistumine lt 150 ms
• Paketikadu G.711 korral lt 0,5
• Hilistumise varieeruvus lt 40ms
• Kõne kodeerimine
• Võimaluse korral kasutada G.711

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Enterprise VoIP Networking
Traditional Enterprise Telephony and Data Network
Branch
Head office
PBX

• 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)

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H.323 Videoconferencing
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Remote Extension

• Lower investment
• Provide enhanced PBX services to
• remote employees
• Simple entry-level application
• Avoids PSTN charges for calls to the
• remote office

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IP PBX Extension
IP PBX
IP Phone
MediaPack
Head Office
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IP PBX Extension
IP PBX
IP Phone
MediaPack
Head Office
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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

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Client Authorization

• Open Gatekeepers
• anyone can register
• Predefined Endpoints
• LDAP Authenticated Endpoints

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MGCP