Web conferencing refers to a service that allows conferencing events to be shared with
remote locations.
These are sometimes referred to as webinars or, for interactive conferences, online workshops.
In general, the service is made possible by Internet technologies, particularly on TCP/IP
connections.
The service allows real-time point-to-point communications as well as multicast communications
from one sender to many receivers.
It offers data streams of text-based messages, voice and video chat to be shared simultaneously,
across geographically dispersed locations.
Applications for web conferencing include meetings, training events, lectures, or short
presentations from any computer.
Functionality Some web conferencing solutions require additional
software to be installed by the presenter and participants, while others eliminate this
step by providing physical hardware or an appliance.
In general, system requirements depend on the vendor.
Some web conferencing services vendors provide a complete solution while others enhance existing
technologies.
Most also provide a means of interfacing with email and calendaring clients in order that
customers can plan an event and share information about it, in advance.
A participant can be either an individual person or a group.
System requirements that allow individuals within a group to participate as individuals
depend on the size of the group.
Handling such requirements is often the responsibility of the group.
Most vendors also provide either a recorded copy of an event, or a means for a subscriber
to record an event.
Support for planning a shared event is typically integrated with calendar and email applications.
The method of controlling access to an event is provided by the vendor.
Additional value-added features are included as desired by vendors who provide them.
Besides exceptions, web conferencing services do not apply free software but proprietary
software, see Comparison of web conferencing software.
Etymology The term "webinar" is a portmanteau of web
and seminar, meaning a presentation, lecture, or workshop that is transmitted over the Web.
Some argue that webinars might be one-way, from the speaker to the audience with limited
audience interaction, so one-way broadcasts are perhaps more accurately called webcasts.
Webinars themselves may be more collaborative and include polling and question & answer
sessions to allow full participation between the audience and the presenter.
In some cases, the presenter may speak over a standard telephone line, while pointing
out information being presented onscreen, and the audience can respond over their own
telephones or microphones connected to their computers, speaker phones allowing the greatest
comfort and convenience.
There are web conferencing technologies on the market that have incorporated the use
of VoIP audio technology, to allow for a completely web-based communication.
Depending upon the provider, webinars may provide hidden or anonymous participant functionality,
making participants unaware of other participants in the same meeting.
Interactive conferencing For interactive "online workshops" web conferences
are complemented by electronic meeting systems which provide a range of online facilitation
tools such as brainstorming and categorization, a range of voting methods or structured discussions,
typically with optional anonymity.
Typically, EMS do not provide core web conferencing functionality such as screen sharing or voice
conferencing though some EMS can control web conferencing sessions.
Features Other typical features of a web conference
include: Slideshow presentations - where images are
presented to the audience and markup tools and a remote mouse pointer are used to engage
the audience while the presenter discusses slide content.
Live or streaming video - where full motion webcam, digital video camera or multi-media
files are pushed to the audience.
VoIP - Real time audio communication through the computer via use of headphones and speakers.
Web tours - where URLs, data from forms, cookies, scripts and session data can be pushed to
other participants enabling them to be pushed though web based logons, clicks, etc.
This type of feature works well when demonstrating websites where users themselves can also participate.
Meeting Recording - where presentation activity is recorded on the client side or server side
for later viewing and/or distribution.
Whiteboard with annotation Text chat - For live question and answer sessions,
limited to the people connected to the meeting.
Text chat may be public or private.
Polls and surveys Screen sharing/desktop sharing/application
sharing Web conferencing is often sold as a service,
hosted on a web server controlled by the vendor.
Offerings vary per vendor but most hosted services provide a cost per user per minute
model, a monthly flat fee model and a seat model.
Some vendors also provide a server side solution which allows the customer to host their own
web conferencing service on their own servers.
Examples of this include Microsoft Office Communications Server.
Standards Web conferencing technologies are not standardized,
which has been a significant factor in the lack of interoperability, transparency, platform
dependence, security issues, cost and market segmentation.
In 2003, the IETF established a working group to establish a standard for web conferencing,
called "Centralized Conferencing".
The planned deliverables of xcon include: A binary floor control protocol.
Binary Floor Control Protocol published as RFC 4582
A mechanism for membership and authorization control
A mechanism to manipulate and describe media "mixing" or "topology" for multiple media
types A mechanism for notification of conference
related events/changes Deployment models
Web conferencing is available with three models: hosting service, software and appliance.
An appliance, unlike the online hosted solution, is offered as hardware.
It is also known as "in-house" or "on-premise" web conferencing.
It is used to conduct live meetings, remote training, or presentations via the Internet.
History Real-time text chat facilities such as IRC
appeared in the late 1980s.
Web-based chat and instant messaging software appeared in the mid-1990s.
In the late 1990s, the first true web conferencing capability became available from Starlight
Networks StarLive product and dozens of other web conferencing services such as WebEx followed.
A trademark for the term "webinar" was registered in 1998 by Eric R. Korb but was difficult
to defend; it is currently assigned to InterCall.
Web conferencing started with Plato, a small standalone system that supports a single class
of terminals connected to a central computer.
Software and service providers Notable vendors with articles:
See also Comparison of web conferencing software
Collaborative software Electronic meeting system
Hybrid event Web television
Webcast References
External links Web-Conferencing Software Tools – A Market
Survey from the University of St. Gallen, Switzerland
Ease of Use in Web Conferencing – Why it Matters from Wainhouse Research
Webinar Software Providers Critical Factors for Adoption of Collaboration
Technologies in the Enterprise from Collaborative Strategies
Webinar Definitions Slideshare presentation Evaluation Guide for Web Conferencing Software
Webinar Best Practices