NEXT DECK Flashcards
Decodes the signal and receives the light signal.
optical receiver
optical receiver uses a _______ or _______ to detect the light signal, decodes it, and sends an ___________ to a computer, TV, or telephone.
photocell, photodiode, electrical signal
Needed over long distances to boost the light signal.
optical regenerator
One or more ________________ may be spliced along a
long cable to amplify the degraded light signal.
optical regenerator, optical regeneratorS
A term used to describe telecommunications in which
electromagnetic waves carry the signal.
wireless
The operation of wireless devices or systems in homes
and offices, and in particular, equipment connected to
the Internet by the use of specialized modems.
Fixed Wireless Network
Enables users to establish and maintain a wireless
connection throughout or between buildings, without
the limitations of wires or cables.
Fixed Wireless Network
TYPES OF WIRELESS NETWORKS:
-Has a wavelength of 650 nm which consists of a number of computers, each equipped with a wireless networking interface card.
-Each computer can communicate directly with all of the
other wireless-enabled computers and equipment (e.g.,
printers).
peer - to - peer
TYPES OF WIRELESS NETWORKS:
- Has a computer or receiver that serves as the point at which the network is accessed.
- Acts like a hub, which provides CONNECTIVITY for the wireless equipment.
Access point or base station
MODES OF TRANSMISSION IN FIXED WIRELESS SYSTEMS:
-The use of technology in devices or systems that CONVEY data through ________ radiation.
- __________ radiation is electromagnetic energy at wavelengths somewhat longer than those of visible red light.
- Invisible to the unaided eye.
- Used for SHORT- and MEDIUM communications
infrared
MODES OF TRANSMISSION IN FIXED WIRELESS SYSTEMS:
-Uses _______ waves to send and receive information, similar to a garage door opener, baby monitor, walkie-talkie, or portable phone.
- Can transmit data through walls and between NEARBY BUILDINGS.
- Invisible to the unaided eye.
- Offers FLEXIBLE linking capability between communication devices
radio frequency, radio
MODES OF SYSTEMS
There must be a visually unobstructed straight-line path
through space between the transmitter (source) and
receiver (destination).
Line-of-sight mode
MODES OF SYSTEMS
Where the system can function when the source and destination are not directly visible to each other.
Diffuse Mode
- Derived from the term WIRELESS FIDELITY
- The popular expression used to describe high-frequency wireless local area network (WLAN) technology.
- Wireless __________ provide internet access using wireless network devices installed in public locations.
WI-FI, hotspots
Can be set up for use either free or with a paid subscription in public places such as airports, hotels, coffee shops, civic plazas, conference centers, school buildings, and libraries.
Wi-Fi
WIFI can serve as a _____ in a building that has not been pre-equipped with cable.
LAN
Wi-Fi is the pre-eminent technology for building _____________ wireless networks.
general purpose
A manner wherein a telecommunication signal is affected due to a telecommunication cable placed within an electromagnetic field.
electromagnetic interference
Electrical _______ flow in power lines generates an electromagnetic field that surrounds the electrical conductor.
current
Electrical equipment, especially large motors, generators, induction heaters, arc welders, x-ray equipment, and radio frequency, microwave, or radar sources, also produce a powerful electromagnetic field.
FACT
Due to electromagnetic interference, ______ and _____ TELECOMMUNICATIONS cabling should not be run adjacent and parallel to POWER (electrical) cabling unless the cables are ________ and ________.
voice, data, shielded, grounded
In general, telecommunications cabling is routed separately,
or ______________ away from power cabling. For similar reasons, telecommunications cabling must be routed away from ___________________.
several feet, electrical equipment
