F
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 connecting
your Telephony Gateway.
Firewall
A hardware or software device that
prevents unauthorized access to a private
network from the Internet. The TG2492
provides a built-in firewall.
G
Gateway
The device, usually a router, that connects
devices on a given IP subnet to other IP
subnets.
H
Headend
The “central office” in an HFC network. The
headend houses both video and data
equipment. In larger cable networks, a
“master” headend often feeds several
“remote” headends to provide distributed
services.
HTTP
HyperText Transfer Protocol.
Hub
A box with several Ethernet connectors.
Ethernet hubs provide a common point of
contact for all connected devices.
I
IP address
A number assigned to your computer by
your cable company, used to identify your
computer to other systems on the
Internet.
ISDN
Integrated Services Digital Network. A
digital telephony standard that provides
communication speeds about twice as fast
as standard dialup.
L
LAN
Local Area Network. A network that allows
computers in a single location (such as a
building) to communicate with one
another.
LED
Light Emitting Diode. A semi-conductor
diode that emits light when current is
passed through it.
M
MAC address
A number that uniquely identifies any
device connected to a network. Your cable
company uses your Telephony Gateway’s
MAC address to authorize access to the
Internet. The MAC address is printed on a
label on the bottom of your Telephony
Gateway.
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