Chapter 7
Glossary
Amp-Hour
A measure of battery capacity. For example, a 1.0Ah
battery can nominally supply one Ampere of current for
one hour.
Category 5e (Cat5e)
A high-quality type of cable, used for gigabit Ethernet
(1000BaseT) connections. When purchasing Ethernet
cables, always look for Category 5e cable or higher.
Coaxial cable (coax)
A thin wire, used to connect your television and your
telephony modem to the cable TV system. You can buy
coax from any electronics retailer and many discount
stores.
CPE
Customer Premise Equipment. This is the equipment that
is plugged in to your telephony modem; typically, a
computer or a hub.
Cross-over
An Ethernet cable used to connect two hubs (or a hub and
a cable modem) together. Also, some Ethernet hubs may
have built-in cross-over on one or more ports (which
eliminates the need for a cross-over cable).
DHCP
Dynamic Host Configuration Protocol. An IP protocol used
to provide an IP address and location of services (such as
DNS and TFTP) needed by a device connecting to the
network. DHCP allows the service provider to configure
your computer's networking software for you.
DNS
Domain Name Service (Server). An IP service that
associates a domain name (such as www.example.com)
with an IP address.
DOCSIS
Data Over Cable System Interface Specification. The
interoperability standards used for data communications
equipment on an HFC network.
Downstream
In an HFC network, the direction from the head-end to the
subscriber. Some older cable documentation may refer to
this as the forward path.
EMTA
Embedded Multimedia Terminal Adapter. An MTA device
that is integrated with a cable modem.
Ethernet
A standard method of connecting two or more computers
into a Local Area Network (LAN).
SURFboard
®
SBV2402 Internet and Voice Cable Modem for Xfinity
®
customers User Guide STANDARD Revision x.3 34
Summary of Contents for ARRIS SURFboard SBV2402
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