User’s Manual
2.4GHz, Wireless USB dongle
With antena 2dBi
Information To User
Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help. This device complies with Part 15 of the
FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received, including interference that may cause undesired
operation.FCC Caution: Any changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance 20cm between the radiator & your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
WLAN Adapter must be installed and used in strict accordance with the instructions. This device complies with the
following radio frequency and safety standards.
USA - Federal Communications Commission (FCC) This device complies with Part 15 of FCC Rules. Operation is
subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference that may cause undesired operation.
Europe - R&TTE Directive
This device complies with the specifications listed below
ETS 300-826 General EMC requirements for Radio equipment.
ETS 300-328 Technical requirements for Radio equipment.
EN60950 Safety Requirements for Radio equipment
The channel identifiers, channel center frequencies, and regulatory domains of each 22-MHz-wide channel are shown
in following Table.
Regulatory Domains
Thank you for your purchase of the WLAN Adapter. Featuring wireless technology, this wireless networking
solution has been designed for both large and small businesses, and it is scalable so that you can easily add more
users and new network features depending on your business scale.
Support Microsoft 2000, XP, x64 and Vista.
Operating distance of up to 300 meters in free space.
150//54/48/36/24/18/12/11/9/6/5.5/2/1 Mbps selectable Data Rate.
64/128-bit WEP , WPA (Wi-Fi Protected Access), WPA2
2.400GHz ~ 2.484GHz unlicensed ISM Frequency Band. Modulation Method :
IEEE 802.11b : DSSS (Direct Sequence Spread Spectrum).
IEEE 802.11g / 802.11n : OFDM (Orthogonal Frequency Division Multiplexing). Easy operation and setting
Windows System : 2000, XP 32/64, Vista 32/64
PCs must have a device driver installed. It allows you to communicate with WLAN Adapter.
Confirm Box Contents
Wireless LAN Adapter
Driver CD
2 dBi antenna
Connect your WLAN adaptor to your PC.And Install driver.
LED turns on when WLAN link to WLAN adaptor or AP.
LED is blinking when WLAN Adapter is active.
Wireless LAN Basics
Wireless LAN network defined by IEEE 802.11b/g standard committee could be configured as :
Ad Hoc wireless LAN.
Infrastructure wireless LAN.
Ad Hoc network is a group of PCs installed with wireless LAN cards, this group of PCs is called a BSS (Basic Service
Set). PCs in this group can use their wireless LAN cards to communicate with each other, but can not connect to the
Ad Hoc Wireless Network
Infrastructure Wireless Network
The most obvious difference between Infrastructure wireless network and Ad Hoc wireless network is that the PCs in
Infrastructure wireless network can access the resource in the Internet through Access Point.
Depending on your requirement, you can easily set up your PC’s network to be a “Ad Hoc” or “Infrastructure”
wireless network. Generally speaking, if in your network, there is an Access Point in it, we recommend you to set
your network as an “Infrastructure”, so it can connect to the Internet.
To use the WLAN Adapter with a computing device, the WLAN Adapter must be equipped with a proper
Interface. All drivers and supporting software for the WLAN Adapter must be installed and configured first.
Ask your system administrator for the following information, which you may need to provide during driver
installation :
Your Wireless Client Name.
Your Wireless SSID.
Your computer’s unique client name and workgroup name.
For your network account, your user name and password.
Your IP address, gateway address, and subnet mask if you’re not using a DHCP client.
Any computer on a network is identified by a unique network address. There are two methods to assign a
network address to a computer on a TCP/IP network :
Static IP addressing.
Dynamic IP addressing (DHCP Client).
In network with static IP addressing, the network administrator manually assigns an IP address to each
computer. Once a static IP address is assigned, a computer uses the same IP address every time it reboots and logs
on to the network. You may manually change the IP address in the Network Properties dialog box. Network using
static IP address is easy to set up and do not require additional network management software.
In network with dynamic IP addressing, a DHCP server in the network dynamically assigns IP addresses to all
clients every time they log on to the network. Network using dynamic IP address requires setting up and running a
DHCP Server.
Install Driver/Utility
Warning! Do not cover or block the airflow to the adapter. The adapter will reach a high temperature during
Windows XP/2K
Step 1 :
Insert the installation CD into your CD-ROM. Installation program will prompt language setup.Choose the Setup
Language you would like to use and click Next button.
Step 2 :
Welcome Installation dialog prompt shown. Click Next to continue. Click Cancel to close installation. Installing and
configuring wlan utility.
Step3 :
Click Install.
Step4 :
Click Finish to complete installation.
Windows Vista
Step 1 :
Insert the installation CD into your CD-ROM. Installation program will prompt language setup.Choose the Setup
Language you would like to use and click Next button.
Step 2 :
Welcome Installation dialog prompt shown. Click Next to continue. Click Cancel to close installation. Installing and
configuring wlan utility.
Step3 :
Click Install.
Step4 :
Click Finish to complete installation.
Wireless Network Configuration
WLAN adapter uses its own management software. All functions controlled by users are provided by this
application. When you insert the WLAN Adapter into your laptop or desktop, a icon should appear in the Windows
System Tray automatically.
Utility Icon
Client mode utility running but no WLAN Adapter plugged.
Client mode utility running and WLAN Adapter scan available network.
Client mode utility running and WLAN Adapter can not scan any AP.
Client Mode (Default Setting)
Wireless Device Control
Show Tray Icon – Show icon or not show icon in systray.
Radio Off – Stop wireless signal.
Disable Adapter – Stop wireless device.
Once device is set, double click on that icon and the configuration window will pop up as shown. It shows the current
connected network. The signal strength and link quality are displayed also. The bar graph displays the quality and
strength of the link between the node and its Access Point. Link Quality is a measurement of receiving and
transmitting performances over the radio.
Network Address displays current MAC Address, IP Address, Subnet. and Gateway.
Click Renew IP button to refresh IP address leased from wireless AP.
In profile tab, you can Add, Remove, Edit, Duplicate and Set Default to manipulate profile content manually. Strongly
recommend to use profile after you do Available Network.
Click Available Network tab and it will show all available networks that radio can reaches. Select proper SSID &
BSSID you want to connect.
Click Refresh button to force and rescan available networks currently.
Select one of SSIDs, and click Add to Profile to create profile that can be configured more wireless parameters.
In this page, you can edit your profile name, configure wireless security like WEP, WPA, WPA2, 802.1x …etc. After
finishing setup, click OK button to save configuration.
Status page tab, shows all wireless, networking and device driver version in details.
Statistics page tab will show real-time TX/RX relative counters to check or evaluate the wireless performance.
Click Reset button to set counter to zero.
Wi-Fi Protected Setup
An easy and secure setup solution for Wi-Fi network. you can choose PIN Code or Push Button method to connect to
an AP.
Technical Specifications
Product Name
Wireless LAN 11n USB Adapter
Realtek RTL8188SU
IEEE 802.11b, IEEE 802.11g, IEEE 802.11n
Frequency Band
2.4GHz ~ 2.484GHz unlicensed ISM band
Spread Spectrum
IEEE 802.11b : DSSS
IEEE 802.11g : OFDM
IEEE 802.11n : OFDM
Data Rate
IEEE 802.11b : 1, 2, 5.5, 11Mbps
IEEE 802.11g : 6, 9, 12, 18, 24, 36, 48, 54 Mbps
IEEE 802.11n : 1, 2, 5.5, 6, 9, 11,12, 24, 36, 48, 54, 150Mbps
Operation Mode
Ad hoc, Infrastructure
Transmitter Power
20(±1) dBm @11b,16(±1) dBm @11g,15(±1) dBm @11n
Operating at 11Mbps: < –89 dBm @8% FER, 54 Mbps: < –68 dBm @8% FER
Receive Sensitivity
HT20(2RX/4RX): MCS=0 < -92dBm, MCS=15 < -69dBm
HT40(2RX/4RX): MCS=0 < -92dBm, MCS=15 < -69dBm
64-bit , 128-bit WEP, WPA / WPA2 (TKIP/AES)
Operating System
Windows® 2000, XP 32/64, Vista 32/64
Operating Temperature 0 ~ 55 Celsius degree
Storage Temperature
-20 ~ 70 Celsius degree
5 ~ 90% (non-condensing)
49 (L) x 26 (W) x 10 (H) mm
Symptom : The LED is off.
Remedy :
Make sure the PC Card is inserted properly. Otherwise contact your
Symptom : The LED is always on not blinking.
Make sure that you have installed the driver from attached CD.
Otherwise contact your vendor.
The LED is blinking but the PC Card icon does not appear in your icon
Symptom :
Remedy :
Remedy :
Make sure that you have installed the Utility from the attached CD.
Symptom : The PC Card is linking, but can’t share files with others.
Remedy :
Make sure the file and printer sharing function is enabled. You can
enable the function by checking the icon of My Computer -> Control
Panel -> Network -> file and printer sharing -> I want to be able to
give others to access to my files.
Symptom : Slow or poor performance under AP mode
Remedy :
Try to select another channel for the communicating group or move your
device closer to the Access Point.
1. IEEE 802.11 Standard
The IEEE 802.11 Wireless LAN standards subcommittee, which is formulating a standard for the industry.
2. Access Point
An internetworking device that seamlessly connects wired and wireless networks together.
3. Ad Hoc
An Ad Hoc wireless LAN is a group of computers, each with a WLAN adapter, connected as an independent wireless
LAN. Ad Hoc wireless LAN is applicable at a departmental scale for a branch or SOHO operation.
A specific Ad Hoc LAN is called a Basic Service Set (BSS). Computers in a BSS must be configured with the same
Dynamic Host Configuration Protocol - a method in which IP addresses are assigned by server dynamically to clients
on the network. DHCP is used for Dynamic IP Addressing and requires a dedicated DHCP server on the network.
6. Direct Sequence Spread Spectrum
This is the method the wireless cards use to transmit data over the frequency spectrum. The other method is
frequency hopping. Direct sequence spreads the data over one frequency range (channel) while frequency hopping
jumps from one narrow frequency band to another many times per second.
An Infrastructure configuration could also support roaming capability for mobile workers. More than one BSS can be
configured as an Extended Service Set (ESS). Users within an ESS could roam freely between BSSs while served as
a continuous connection to the network wireless stations and Access Points within an ESS must be configured with
the same ESSID and the same radio channel.
8. Ethernet
Ethernet is a 10/100Mbps network that runs over dedicated home/office wiring. Users must be wired to the network at
all times to gain access.
9. Gateway
A gateway is a hardware and software device that connects two dissimilar systems, such as a LAN and a mainframe.
In Internet terminology, a gateway is another name for a router. Generally a gateway is used as a funnel for all traffic
to the Internet.
10. IEEE
Institute of Electrical and Electronics Engineers Infrastructure. An integrated wireless and wired LAN is called an
Infrastructure configuration. Infrastructure is applicable to enterprise scale for wireless access to central database, or
wireless application for mobile workers.
11. ISM Band
The FCC and their counterparts outside of the U.S. have set aside bandwidth for unlicensed use in the so-called ISM
(Industrial, Scientific and Medical) band. Spectrum in the vicinity of 2.4 GHz, in particular, is being made available
worldwide. This presents a truly revolutionary opportunity to place convenient high-speed wireless capabilities in the
hands of users around the globe.
12. Local Area Network (LAN)
A LAN is a group of computers, each equipped with the appropriate network adapter card connected by cable/air, that
share applications, data, and peripherals. All connections are made via cable or wireless media, but a LAN does not
use telephone services. It typically spans a single building or campus.
13. Network
A network is a system of computers that is connected. Data, files, and messages can be transmitted over this network.
Networks may be local or wide area networks.
14. Protocol
A protocol is a standardized set of rules that specify how a conversation is to take place, including the format, timing,
sequencing and/ or error checking.
15. SSID
A Network ID unique to a network. Only clients and Access Points that share the same SSID are able to communicate
with each other. This string is case-sensitive.
16. Static IP Addressing
A method of assigning IP addresses to clients on the network. In networks with Static IP address, the network
administrator manually assigns an IP address to each computer. Once a Static IP address is assigned, a computer
uses the same IP address every time it reboots and logs on to the network, unless it is manually changed.
17. Temporal Key Integrity Protocol (TKIP)
The Temporal Key Integrity Protocol, pronounced tee-kip, is part of the IEEE 802.11i encryption standard for wireless
LANs. TKIP is the next generation of WEP, the Wired Equivalency Protocol, which is used to secure 802.11 wireless
LANs. TKIP provides per-packet key mixing, a message integrity check and a re-keying mechanism, thus fixing the
flaws of WEP.
18. Transmission Control Protocol / Internet Protocol (TCP/IP)
TCP/IP is the protocol suite developed by the Advanced Research Projects Agency (ARPA). It is widely used in
corporate Internet works, because of its superior design for WANs. TCP governs how packet is sequenced for
transmission the network. The term “TCP/IP” is often used generically to refer to the entire suite of related protocols.
19. Transmit / Receive
The wireless throughput in Bytes per second averaged over two seconds.
20. Wi-Fi Alliance
The Wi-Fi Alliance is a nonprofit international association formed in 1999 to certify interoperability of wireless Local
Area Network products based on IEEE 802.11 specification. The goal of the Wi-Fi Alliance’s members is to enhance
the user experience through product interoperability. The organization is formerly known as WECA.
21. Wi-Fi Protected Access (WPA)
The Wi-Fi Alliance put together WPA as a data encryption method for 802.11 wireless LANs. WPA is an
industry-supported, pre-standard version of 802.11i utilizing the Temporal Key Integrity Protocol (TKIP), which fixes
the problems of WEP, including using dynamic keys.
22. Wide Area Network (WAN)
A WAN consists of multiple LANs that are tied together via telephone services and / or fiber optic cabling. WANs may
span a city, a state, a country, or even the world.
23. Wired Equivalent Privacy (WEP)
Now widely recognized as flawed, WEP was a data encryption method used to protect the transmission between
802.11 wireless clients and APs. However, it used the same key among all communicating devices. WEP’s problems
are well-known, including an insufficient key length and no automated method for distributing the keys. WEP can be
easily cracked in a couple of hours with off-the-shelf tools.
24. Wireless LAN (WLAN)
A wireless LAN does not use cable to transmit signals, but rather uses radio or infrared to transmit packets through
the air. Radio Frequency (RF) and infrared are the commonly used types of wireless transmission. Most wireless
LANs use spread spectrum technology. It offers limited bandwidth, usually under 11Mbps, and users share the
bandwidth with other devices in the spectrum; however, users can operate a spread spectrum device without licensing
from the Federal Communications Commission (FCC).
25. Fragment Threshold
The proposed protocol uses the frame fragmentation mechanism defined in IEEE 802.11 to achieve parallel
transmissions. A large data frame is fragmented into several fragments each of size equal to fragment threshold. By
tuning the fragment threshold value, we can get varying fragment sizes. The determination of an efficient fragment
threshold is an important issue in this scheme. If the fragment threshold is small, the overlap part of the master and
parallel transmissions is large. This means the spatial reuse ratio of parallel transmissions is high. In contrast, with a
large fragment threshold, the overlap is small and the spatial reuse ratio is low. However high fragment threshold
leads to low fragment overhead. Hence there is a trade-off between spatial re-use and fragment overhead.
Fragment threshold is the maximum packet size used for fragmentation. Packets larger than the size programmed in
this field will be fragmented If you find that your corrupted packets or asymmetric packet reception (all send packets,
for example). You may want to try lowering your fragmentation threshold. This will cause packets to be broken into
smaller fragments. These small fragments, if corrupted, can be resent faster than a larger fragment. Fragmentation
increases overhead, so you'll want to keep this value as close to the maximum value as possible.
26. RTS (Request To Send) Threshold
The RTS threshold is the packet size at which packet transmission is governed by the RTS/CTS transaction. The
IEEE 802.11-1997 standard allows for short packets to be transmitted without RTS/CTS transactions. Each station
can have a different RTS threshold. RTS/CTS is used when the data packet size exceeds the defined RTS threshold.
With the CSMA/CA transmission mechanism, the transmitting station sends out an RTS packet to the receiving
station, and waits for the receiving station to send back a CTS (Clear to Send) packet before sending the actual
packet data. This setting is useful for networks with many clients. With many clients, and a high network load, there
will be many more collisions. By lowering the RTS threshold, there may be fewer collisions, and performance should
improve. Basically, with a faster RTS threshold, the system can recover from problems faster. RTS packets consume
valuable bandwidth, however, so setting this value too low will limit performance.
27. Beacon Interval
In addition to data frames that carry information from higher layers, 802.11 includes management and control frames
that support data transfer. The beacon frame, which is a type of management frame, provides the "heartbeat" of a
wireless LAN, enabling stations to establish and maintain communications in an orderly fashion. Beacon Interval
represents the amount of time between beacon transmissions. Before a station enters power save mode, the station
needs the beacon interval to know when to wake up to receive the beacon (and learn whether there are buffered
frames at the access point).
28. Preamble Type
There are two preamble types defined in IEEE 802.11 specification. A long preamble basically gives the decoder more
time to process the preamble. All 802.11 devices support a long preamble. The short preamble is designed to improve
efficiency (for example, for VoIP systems). The difference between the two is in the Synchronization field. The long
preamble is 128 bits, and the short is 56 bits.
29. WPA2
It is the second generation of WPA. WPA2 is based on the final IEEE 802.11i amendment to the 802.11 standard.
30. Temporal Key Integrity Protocol (TKIP)
The Temporal Key Integrity Protocol, pronounced tee-kip, is part of the IEEE 802.11i encryption standard for wireless
LANs. TKIP is the next generation of WEP, the Wired Equivalency Protocol, which is used to secure 802.11 wireless
LANs. TKIP provides per-packet key mixing, a message integrity check and a re-keying mechanism, thus fixing the
flaws of WEP.
31. 802.1x Authentication
802.1x is a framework for authenticated MAC-level access control, defines Extensible Authentication Protocol (EAP)
over LANs (WAPOL). The standard encapsulates and leverages much of EAP, which was defined for dial-up
authentication with Point-to-Point Protocol in RFC 2284.
Beyond encapsulating EAP packets, the 802.1x standard also defines EAPOL messages that convey the shared key
information critical for wireless security.
32. Advanced Encryption Standard (AES)
Security issues are a major concern for wireless LANs, AES is the U.S. government’s next-generation cryptography
algorithm, which will replace DES and 3DES.