ISDN Vs. Cable Modems

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Term Paper Title	ISDN Vs. Cable Modems
# of Words	2862
# of Pages (250 words per page double spaced)	11.45

ISDN vs. Cable Modems

ISDN vs. Cable Modems

1.0 Introduction

The Internet is a network of networks that interconnects computers around the
world, supporting both business and residential users.  In 1994, a multimedia
Internet application known as the World Wide Web became popular.  The higher
bandwidth needs of this application have highlighted the limited Internet access
speeds available to residential users.  Even at 28.8 Kilobits per second (Kbps)—
the fastest residential access commonly available at the time of this writing—
the transfer of graphical images can be frustratingly slow.

This report examines two enhancements to existing residential communications
infrastructure: Integrated Services Digital Network (ISDN), and cable television
networks upgraded to pass bi-directional digital traffic (Cable Modems).  It
analyzes the potential of each enhancement to deliver Internet access to
residential users.  It validates the hypothesis that upgraded cable networks can
deliver residential Internet access more cost-effectively, while offering a
broader range of services.

The research for this report consisted of case studies of two commercial
deployments of residential Internet access, each introduced in the spring of
1994:

·     Continental Cablevision and Performance Systems International (PSI)
jointly developed PSICable, an Internet access service deployed over upgraded
cable plant in Cambridge, Massachusetts;

·     Internex, Inc. began selling Internet access over ISDN telephone
circuits available from Pacific Bell.  Internex's customers are residences and
small businesses in the "Silicon Valley" area south of San Francisco, California.

2.0 The Internet

When a home is connected to the Internet, residential communications
infrastructure serves as the "last mile" of the connection between the home
computer and the rest of the computers on the Internet.  This section describes
the Internet technology involved in that connection. This section does not
discuss other aspects of Internet technology in detail; that is well done
elsewhere.  Rather, it focuses on the services that need to be provided for home
computer users to connect to the Internet.

2.1

ISDN and upgraded cable networks will each provide different functionality (e.g.
type and speed of access) and cost profiles for Internet connections.  It might
seem simple enough to figure out which option can provide the needed level of
service for the least cost, and declare that option "better."  A key p...

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