7.1 INTRODUCTION
In the Federal
Communications Commission (FCC) 1999 report on broadband access, the agency
defined broadband as “the
capability of supporting, in both the provider-to-consumer (downstream) and the
consumer-to-provider (upstream) directions, a speed (in technical terms,
"bandwidth") in excess of 200 kilobits per second (kbps) in the last
mile. This rate is approximately four times faster than the Internet access
received through a standard phone line at 56 kbps”[i] In the FCC’s second report in 2000, the
agency suggested not to use the term “broadband” at all,
because of its “now common and imprecise usage”.[ii] In later reports, the FCC then came back to its
earlier definition from 1999. This clearly illustrates that when reading the
literature on broadband, a single common definition of broadband does not
exist.
Numerous
definitions make it difficult for policy makers to get a first understanding of
the functionality, characteristics, advantages and disadvantages of broadband
technologies. A basic understanding of these technologies, however, is necessary
for informed and effective policy decision-making. The goal of this chapter is
to offer such an understanding not by adding another definition of broadband,
but rather by offering a synopsis of the various, existing definitions, to
derive a few common characteristics. These characteristics present a common
denominator necessary to understand the basic concept of broadband
technologies. Such common characteristics can be described as follows:
- Broadband is characterized by bandwidth and
speed of a network connection. Broadband is usually used to refer to a type of data transmission.
Simply speaking, a broadband connection is a connection that supports the
transmission of data using an extreme broad bandwidth. This allows for a
high-speed transfer rate. Broadband connections have the capability to run
virtually all data intensive applications without delays. Broadband connections
allow for multimedia-rich applications such as streaming audio and
videoconferencing. Definitions of a necessary
threshold of bandwidth greatly vary and often depend on the quality of the
infrastructure that already exists. The FCC defines broadband access at a
relatively low speed. Generally a factor-of-10 improvement over
traditional dial-up modems offering 56 Kbps is seen as broadband connections.
- Broadband connections are typically always on. Because broadband access is always on, unlike
dial-up access, there is no wait to connect to the Internet. It is assumed that
people with broadband access tend to leave their personal computers turned on
and do use the Internet for data intensive business tasks which would be too
expensive to perform via the Internet if only a dial up connection was
available. The presence of broadband access also means that the telephone line
is no longer tied up when accessing the Internet.
- Broadband allows for data intensive home and
business applications: As
broadband is characterized by offering high-speed connections, rather than a
technology, broadband typically includes data, video, text and voice
transmission. Broadband allows people to telecommute effectively by providing a
similar environment to that experienced when physically present in their
office: simultaneous telephone and computer access, high-speed internet and
intranet access for e-mail, file sharing, and access to corporate servers etc.
Access to such application and the necessary bandwidth is assumed to provide
business opportunities especially for developing countries.
- Broadband is a type of a connection rather than a single technology: As broadband is a quality of a service or connection, it can be offered by various technologies. There are many competing broadband access technologies being brought to bear to address last-mile connectivity. According to the International Engineering Society, the following can be distinguished:
- Optical Fibre
- Wireless Technologies (802.16-2004WiMax and 802.11 WiFi)
- BPL (Broadband over Power Line)
- Copper / DSL (Digital Subscriber Line)
- Cable Modems
- Satellite
