10
UStec Structured Wiring Users Manual
Cross-talk -
Undesirable signal coupling to one pair in the cable from signals
in the other pairs. Cross-talk is caused by the magnetic fields in one pair gen-
erating a voltage in another pair.
Data
– The connection point for Ethernet enabled devices such as computers
and IP cameras. Requires Ethernet capability in the UStec tecCenter.
DBS
– A method of delivering “cable television” from satellites in the sky.
DBS is an acronym for Direct Broadcast Satellite. DirecTV and Dish networks
are two examples.
DSL
- A medium for high speed bandwidth of a pair of copper wires. DSL is
an acronym for Digital Subscriber Line. In a residential setting the most com-
mon form of DSL is known as ADSL. Asynchronous Digital Subscriber Line.
EIA/TIA-568-A
- A standard for a generic cabling system; it enables installers
to plan and install structured cabling systems, and establishes performance
and technical criteria for interfacing and connecting cable and telecommuni-
cations devices. Not to be confused with T568A which is a color code scheme.
Ethernet
- A standardized way of connecting computers in a network.
Externals -
Signals that enter the home from a utility or service provider.
These services may include CATV, satellite TV, broadcast TV, telephone, and
high speed Internet access.
Forward Channel -
Signals from the CATV headend or antenna to the televi-
sion.
Frequency
- In alternating current, the number of cycles per second; also
expressed in Hertz (Hz).
Gain
- The amount of increase in signal. +3db indicates that the signal level
will be 3dB higher on the TV out ports than what went into the input. -13dB
refers to the loss of signal level that occurs going back to the headend equip-
ment.
Gateway Server
- A device located in the UStec system that provides gateway
services for the home. Currently they include Internet connection sharing, file
sharing, security, firewall protection, application serving.
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