NetMeeting

Microsoft NetMeeting is a discontinued VoIP and multi-point videoconferencing client included in many versions of Microsoft Windows (from Windows 95 OSR2 to Windows XP). It uses the H.323 protocol for videoconferencing, and is interoperable with OpenH323-based clients such as Ekiga, OpenH323, and Internet Locator Service (ILS) as reflector. It also uses a slightly modified version of the T.120 Protocol for whiteboarding, application sharing (or by extension, desktop sharing), and file transfers.

NetMeeting was originally bundled with later versions of Internet Explorer 3, and with Internet Explorer 4. It incorporates technology acquired by Microsoft from UK software developer Data Connection Ltd and DataBeam Corporation (subsequently acquired by Lotus).

Before video service became common on free IM clients, such as Yahoo! Messenger and MSN Messenger, NetMeeting was a popular way to perform video conferences and chatting over the Internet (with the help of public ILS servers, or "direct-dialing" to an IP address). The defunct TechTV channel even used NetMeeting as a means of getting viewers onto their call-in shows via webcam, although viewers had to call on their telephones, because broadband Internet connections were still rare.

NetMeeting uses H.323 standard for videoconferencing: It uses G.723.1 and G.711 standards for audio coding and offers bit-rates between 5.3 kbit/s and 64 kbit/s. For video coding, it uses H.263 standard and supports 30 frames per second. NetMeeting multimedia conferencing sessions over the network are established via , and network protocol.

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