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Instant Broadband
TM
Series
Package Contents
• One EtherFast
®
Cable Modem with USB and Ethernet Connection
• One AC Adapter
• One Power Cord
• One USB Cable
• One Setup Utility CD
• Electronic User Guide (on Setup Utility CD)
• One Registration Card
System Requirements
• CD-ROM drive
• PC running Windows 98, Millennium or 2000 equipped with USB
port (to use the USB connection)
or
• 10/100Mbps RJ-45 Ethernet Network Interface Card
• DOCSIS 1.0 compliant headend or DOCSIS 1.0 compliant MSO
network (Cable Internet Service Provider)
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Getting to Know the Cable
Modem with USB and Ethernet
Connection
Overview
A "Cable Modem" is a device that allows high-speed data access (such as to the
Internet) via a cable TV network. A cable modem will typically have two con-
nections, one to the cable wall outlet and the other to a computer (PC). The fact
that the word "modem" is used to describe this device can be a little mislead-
ing only in that it conjures up images of a typical telephone dial-up modem.
Yes, it is a modem in the true sense of the word since it MOdulates and
DEModulates signals. However, the similarity ends there, as these devices are
much more complicated than telephone modems. Cable modems can be part
modem, part tuner, part encryption/decryption device, part bridge, part router,
part network interface card, part SNMP agent, and part Ethernet hub.
Cable modem speeds vary, depending on the cable modem system, cable net-
work architecture, and traffic load. In the downstream direction (from the net-
work to the computer), network speeds can reach 27 Mbps, an aggregate
amount of bandwidth that is shared by users. Few computers will be capable of
connecting at such high speeds, so a more realistic number is 1 to 3 Mbps. In
the upstream direction (from computer to network), speeds can be up to 10
Mbps. However, most modem producers have selected a more optimum speed
between 500 Kbps and 2.5 Mbps. Some service providers limit upstream access
speeds to 256 Kbps or less. Check with your Cable Internet Service Provider
for more information about upload (upstream) and download (downstream)
access speeds for more specific information.
In addition to speed, there's no need to dial in to an Internet service provider
(ISP) when you are using your Cable Modem. Simply click on your browser
and you're on the Internet. No more waiting, no more busy signals.
Overview
EtherFast
®
Cable Modem with USB and Ethernet Connection
3