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Voice over IP

Need more gateways that connect IP network to phone networks The IP network could be dedicated intra-net or the Internet. The phone networks could be intra-company PBXs or the carrier switches Phone Network Gateway | VoiceVoice overover IPIP IP Raj Jain The Ohio State University Columbus, OH 43210 Jain@CIS.Ohio-State.Edu http://www.cis.ohio-state.edu/~jain/ Raj Jain 1 OverviewOverview Sample Products and Services 13 Technical Issues 4 Other Issues H.323 Standard Session Initiation Protocol (SIP) Raj Jain 2 ScenarioScenario 1:1: PCPC toto PCPC IP Network Need a PC with sound card IP Telephony software: Cuseeme, Internet Phone, . Video optional Raj Jain 3 ScenarioScenario 2:2: PCPC toto PhonePhone IP Phone Network Network Gateway Need a gateway that connects IP network to phone network (Router to PBX) Raj Jain 4 ScenarioScenario 3:3: PhonePhone toto PhonePhone Phone IP Phone Network Network Network Gateway Gateway Need more gateways that connect IP network to phone networks The IP network could be dedicated intra-net or the Internet. The phone networks could be intra-company PBXs or the carrier switches Raj Jain 5 SampleSample ProductsProducts VocalTec Internet Phone: PC to PC. Microsoft NetMeeting: PC to PC. Free. Internet PhoneJACK: ISA card to connect a standard phone to PC. Works with NetMeeting, InternetPhone etc. Provides compression. Internet LineJACK: Single-line gateway. Micom V/IP Family: m Analog and digital voice interface cards m PC and/or gateway Raj Jain 6 ProductsProducts (Cont)(Cont) PBX Gateway PC w Router IP Network V/IP S/w m Features: q Compression q Phone number to IP address translation. q Supports RSVP. q Limits number of calls. Raj Jain 7 ProductsProducts (Cont)(Cont) VocalTec Internet Telephony Gateway: m Similar to Micom V/IP m Interactive voice response system for problem reporting m Allows WWW plug in m Can monitor other gateways and use alternate routes including PSTN m Sold to Telecom Finland. New Zealand Telecom. Lucent's Internet Telephony Server: Gateway| Lucent PathStar Access Server Raj Jain 8 ProductsProducts (Cont)(Cont) CISCO 2600 Routers: Voice interface cards (VICs) Reduces one hop. Baynetworks, 3COM, and other router vendors have .