Chung Nam Electronics Co. Ltd. WLANTPBG ユーザーズマニュアル

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 WLAN Transmission Technology - The WLAN device 

with 2x to 3x eXtended Range

TM

 WLAN transmission technology make its sensitivity up to 

105 dB, which gives users the ability to have robust, longer-range wireless connections. 

With this range-enhancing technology, a 2x to 3x eXtended Range

TM

 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 2x to 3x eXtended Range

TM

 based client and access point can maintain a 

connection transmission distance may be up to 830m. 

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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. 

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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. 

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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.   

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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). 

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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. 

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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