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TL-WN512AG/TL-WN552AG/TL-WN553AG
54M Wireless Adapter User Guide
Appendix B: Glossary
TM
2x to 3x eXtended Range
WLAN Transmission Technology - The WLAN device with 2x
TM
to 3x eXtended Range
WLAN transmission technology make its sensitivity up to 105 dBm,
which gives users the ability to have robust, longer-range wireless connections. With this
TM
range-enhancing technology, a 2x to 3x eXtended Range
based client and access point
can maintain a connection at as much as three times the transmission distance of traditional
802.11b and 802.11g products, for a coverage area that is up to nine times greater. A
traditional 802.11b and 802.11g product transmission distance is about 300m, A TP-LINK 2x
TM
to 3x eXtended Range
based client and access point can maintain a connection
transmission distance may be up to 830m.
802.11b - The 802.11b standard specifies a wireless product networking at 11 Mbps using
direct-sequence spread-spectrum (DSSS) technology and operating in the unlicensed radio
spectrum at 2.4GHz, and WEP encryption for security. 802.11b networks are also referred to
as Wi-Fi networks.
802.11g - specification for wireless networking at 54 Mbps using direct-sequence
spread-spectrum (DSSS) technology, using OFDM modulation and operating in the
unlicensed radio spectrum at 2.4GHz, and backward compatibility with IEEE 802.11b devices,
and WEP encryption for security.
802.11a - specification for wireless networking at 54 Mbps using OFDM modulation and
operating in radio band at 5GHz.
Ad-hoc Network - An ad-hoc network is a group of computers, each with a wireless adapter,
connected as an independent 802.11 wireless LAN. Ad-hoc wireless computers operate on a
peer-to-peer basis, communicating directly with each other without the use of an access point.
Ad-hoc mode is also referred to as an Independent Basic Service Set (IBSS) or as
peer-to-peer mode, and is useful at a departmental scale or SOHO operation.
DSSS (Direct-Sequence Spread Spectrum) - DSSS generates a redundant bit pattern for all
data transmitted. This bit pattern is called a chip (or chipping code). Even if one or more bits
in the chip are damaged during transmission, statistical techniques embedded in the receiver
can recover the original data without the need for retransmission. To an unintended receiver,
DSSS appears as low power wideband noise and is rejected (ignored) by most narrowband
receivers. However, to an intended receiver (i.e. another wireless LAN endpoint), the DSSS
signal is recognized as the only valid signal, and interference is inherently rejected (ignored).
FHSS (Frequency Hopping Spread Spectrum) - FHSS continuously changes (hops) the
carrier frequency of a conventional carrier several times per second according to a
pseudo-random set of channels. Because a fixed frequency is not used, and only the
transmitter and receiver know the hop patterns, interception of FHSS is extremely difficult.
Infrastructure Network - An infrastructure network is a group of computers or other devices,
each with a wireless adapter, connected as an 802.11 wireless LAN. In infrastructure mode,
the wireless devices communicate with each other and to a wired network by first going
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