Appendix A
Glossary
Category 5e
(Cat5e)
A high-quality type of cable, used for connecons with speeds up to
2.5Gbps (2500Base-T or 2.5GBase-T). When purchasing Ethernet cables,
always look for Category 5e cable or higher.
Coaxial cable
(coax)
A thin wire, used to connect your television and Telephony Gateway 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
the Telephony Gateway; typically a computer or 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 Conguraon Protocol. An IP protocol used to provide an
IP address and locaon of services (such as DNS and TFTP) needed by a
device connecng to the network. DHCP allows the service provider to
congure your computer's networking soware 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 Specicaon. The interoperability
standards used for data communicaons equipment on an HFC network.
Downstream In an HFC network, the direcon from the head-end to the subscriber.
Some older cable documentaon may refer to this as the forward path.
EMTA Embedded Mulmedia Terminal Adapter. An MTA device that is
integrated with a cable modem.
Ethernet A standard method of connecng two or more computers into a Local
Area Network (LAN).
EuroDOCSIS The European version of DOCSIS.
Event An informaonal message used for monitoring network status.
F-connector The type of connector used on coax cable. There are two common types
of F-connector, slip-on and screw-on. Use coax with screw-on connectors
for connecng your Telephony Gateway.
Firewall A hardware or soware device that prevents unauthorized access to a
private network from the Internet. The TG6452 provides a built-in
rewall.
Touchstone TG6452 Telephony Gateway User Guide DRAFT Revision 2.3 37
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