Introduction Range of methods Asynchronous or Synchronous Mobile Communications / Internet
Real Time Communications Text e.g. Internet Relay Chat (IRC) Audio – Internet phone calls Videoconferencing Internet Intranet
Web Based Chat Use chat client or Java applet Real time Normally text based Can include sound and whiteboard
IRC – Internet Relay Chat Talk across the network with unlimited number of participants ‘live’ (real-time) One-to-one and one-to-many Connect to a server Connect to a channel (= discussion) Closed and public discussions
Video Conferencing Provides a direct video link between two or more participants Audio facilities Some systems are Internet based others use telecomms based networks
Video Conferencing: Uses Collaborative work Support of distance learning Remote surveillance Remote Interviews
Video Conferencing: Systems Desktop systems Portable sysems Room based sytems Videophones
Video Conferencing: Transmission Methods Internet CUSeeMe MS Netmeeting ATM ISDN
ATM Asynchronous Transfer Mode Very fast High quality Expensive!
ISDN Telecom network Commercial packages Cost effective Medium quality
Difficulties Quality Cost Range of standards How do you use it efficiently ?
Mobile Communications: What is it ? Laptop computer Mobile phone