Chung Nam Electronics Co. Ltd. WLC312NR ユーザーズマニュアル

 

 

OEM installation Manual   

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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

 

wired network by first going through an access point. An infrastructure wireless 

network connected to a wired network is referred to as a Basic Service Set (BSS). A 

set of two or more BSS in a single network is referred to as an Extended Service Set 

(ESS). Infrastructure mode is useful at a corporation scale, or when it is necessary to 

connect the wired and wireless networks. 

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Spread Spectrum - Spread Spectrum technology is a wideband radio frequency 

technique developed by the military for use in reliable, secure, mission-critical 

communications systems. It is designed to trade off bandwidth efficiency for reliability, 

integrity, and security. In other words, more bandwidth is consumed than in the case 

of narrowband transmission, but the trade off produces a signal that is, in effect,