TP-Link N150 Wireless Nano USB Adapter (TL-WN725N) User Manual

							TL-WN725N 150Mbps Wireless N Nano USB Adapter User Guide 
 
34
 
Figure 6-5 Uninstall Driver 
2. Click  Yes to start uninstalling the driv er software from your PC. 
 
Figure 6-6 
3.  It may take a few minutes to undergo the whole un-installation process.  
						

							TL-WN725N 150Mbps Wireless N Nano USB Adapter User Guide 
 
35
 
Figure 6-7 
4. Click  Finish when the figure below appears. 
 
Figure 6-8    
						

							TL-WN725N 150Mbps Wireless N Nano USB Adapter User Guide 
 
36
Appendix A: Specifications 
Normal 
Interface USB 2.0 Interface 
Standards IEEE  802.11n, IEEE 802.11g, IEEE 802.11b 
Operating System  Windows XP, Windows Vista, Windows 7 
Throughput 150Mbps  (Maximal) 
Radio Data Rate 11b: 1/2/5.5/11Mbps 
11g: 6/9/12/18/
24/36/48/54Mbps 
11n: Up to 150Mbps 
Modulation  11b:CCK,QPSK,BPSK 
11g:OFDM 
11n: QPSK, BPSK, 16-QAM, 64-QAM 
Media Access Protocol  CSMA/CA with ACK 
Data Security 
WEP, WPA/WPA2, WPA-PSK/ WPA2-PSK 
Frequency*  2.4 ~ 2.4835GHz 
Spread Spectrum  Direct Seque nce Spread Spectrum (DSSS) 
Safety & Emissions  FCC, CE, IC, WIFI 
 
Environmental and Physical 
Working Temperature 0℃ ~40  (32 ℃ ~104
℉℉ ) 
Working Humidity  10% ~ 90% RH, Non-condensing 
Storage Temperature  -40 ~70 ( ℃℃-40 ~158℉ )
℉  
Storage Humidity  5% ~  90% RH, Non-condensing 
* Only 2.412GHz~2.462GHz is allowed to be used in USA, which means only channel 1~11 is 
available for American users to choose.
  
						

							TL-WN725N 150Mbps Wireless N Nano USB Adapter User Guide 
 
37
Appendix B: Glossary 
¾ 802.11b - The 802.11b standard specifies a wirele ss product networking at 11 Mbps using 
direct-sequence spread-s pectrum (DSSS) technology and oper ating in the unlicensed radio 
spectrum at 2.4GHz, and WEP enc ryption for security. 802.11b networks are also referred to 
as Wi-Fi networks. 
¾  802.11g  - specification for wireless network ing at 54 Mbps using direct-sequence 
spread-spectrum (DSSS) tec hnology, using OFDM modulation and operat ing in the 
unlicensed radio spectrum at  2.4GHz, and backward compatibility with IEEE 802.11b devices, 
and WEP encryption for security. 
¾  802.11n -  802.11n builds upon previous 802.11 standards  by adding MIMO (multiple-input 
multiple-output). MIMO us es multiple transmitter and 
3receiver antennas to allow for increased 
data throu
ghput via spatial multiplexing and incr eased range by exploiting the spatial diversity, 
perhaps through coding schemes  like Alamouti coding. The Enhanced Wireless Consortium 
(EWC) was formed to help accelerate the  IEEE 802.11n development process and promote a 
technology specificati on for interoperability of next-genera tion wireless local area networking 
(WLAN) products. 
¾  Ad hoc Network - An ad hoc network is a group of com puters, 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 ea ch other without the use of an access point. 
Ad hoc mode is also referred to as an I ndependent Basic Service Set (IBSS) or as 
peer-to-peer mode, and is us eful at a departmental scale or SOHO operation.   
¾  DSSS - ( Direct- Sequence  Spread  Spectrum)  - DSSS generates a redundant bit pattern for all 
data transmitted. This bit pattern is called a ch ip (or chipping code). Even if one or more bits 
in the chip are damaged during transmission, st atistical techniques embedded in the receiver 
can recover the original data without the ne ed of retransmission. To an unintended receiver, 
DSSS appears as low power wideb and 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). 
¾  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 fi xed frequency is not used, and only the 
transmitter and receiver know the hop patterns, interception of FHSS is extremely difficult. 
¾  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 ot her and to a wired network by first going 
through an access point. An infrastructure wi reless 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). Infr astructure mode is useful at a corporation 
scale, or when it is neces sary to connect the wired and wireless networks.    
						

							TL-WN725N 150Mbps Wireless N Nano USB Adapter User Guide 
 
38
¾ Spread Spectrum -  Spread Spectrum technology is  a wideband radio frequency technique 
developed by the military for use in reliable, se cure, 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 t he case of narrowband transmission, but the 
trade off produces a signal that is, in effect, louder and thus easier to  detect, provided that the 
receiver knows the parameters of the spread-spectr um signal being broadcast. If a receiver is 
not tuned to the right frequency, a spread-spectrum signal looks like background noise. 
There are two main alternatives, Direct  Sequence Spread Spectrum (DSSS) and Frequency 
Hopping Spread Spectrum (FHSS). 
¾  SSID -  A Service  Set  Identification is a thirty-two char acter (maximum) alphanumeric key 
identifying a wireless local area network. Fo r the wireless devices in a network to 
communicate with each other, all devices must be  configured with the same SSID. This is 
typically the configuration parameter for a wireless PC card. It corresponds to the ESSID in 
the wireless Access Point and to the wireless network name.  See also Wireless Network 
Name and ESSID. 
¾  WEP - ( Wired  Equivalent  Privacy)  - A data privacy mechanism based  on a 64-bit or 128-bit or 
152-bit shared key algorithm, as described in  the IEEE 802.11 standard. To gain access to a 
WEP network, you must know the key. The key  is a string of characters that you create. 
When using WEP, you must determine the leve l of encryption. The type of encryption 
determines the key length. 128-bit encryption re quires a longer key than 64-bit encryption. 
Keys are defined by entering in a string in HEX  (hexadecimal - using characters 0-9, A-F) or 
ASCII (American Standard Code for Informati on Interchange – alphanumeric characters) 
format. ASCII format is provided so you can  enter a string that is easier to remember. The 
ASCII string is converted to HEX for use over  the network. Four keys can be defined so that 
you can change keys easily. 
¾  Wi-Fi -  A trademark of the Wi-Fi Alliance and the  brand name for products using the IEEE 
802.11 family of standards. 
¾  WLAN -  (W ireless  Local Area  Network) - A group of computers and associated devices 
communicate with each other wirelessly, which network serving users are limited in a local 
area. 
¾  WPA -  (W i-Fi  Protected

 A ccess)  - A wireless security protocol uses TKIP (Temporal Key 
Integrity Protocol) encryption,  which can be used in conjunct ion with a RADIUS server.