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© Copyright LM Technologies Ltd   

 

Page 

13

 of 

29

  

www.lm-technologies.com

 

 

 

 

 

LM821 User Manual 

 

 

4.

 

Wireless LAN Basics 

 

Wireless LAN network defined by IEEE 802.11b/g/n standard committee can be 

configured in the following modes: 

 

Ad Hoc (Point-to-point) wireless LAN.  

 

Infrastructure wireless LAN. 

 

 

Ad Hoc 

Wireless Network 

 

Infrastructure 

Wireless Network 

 

 

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 cannot connect to the 

Internet

 

The main difference between 

Infrastructure 

wireless networks and 

Ad Hoc 

wireless 

networks is that the PCs in an 

Infrastructure 

wireless network can access the resource 

in the Internet through an 

Access Point

 

Depending on your application requirements, you can easily set up your PC’s network to 

be an “

Ad Hoc

” or “

Infrastructure

” wireless network. Generally speaking, if your network 

includes an 

Access Point

, we recommend setting your network as an “

Infrastructure

” 

network to allow connectivity to the 

Interne

Содержание LM821 series

Страница 1: ...ontroller Interface HCI via USB Interface USER MANUAL All rights reserved All trade names are registered trademarks of respective manufacturers listed This manual may not be copied in any media or for...

Страница 2: ...nologies Ltd Page 2 of 29 www lm technologies com LM821 User Manual Revision Date Changes Description v1 0 15 02 2017 First revision of this user manual v1 1 20 02 2017 Added MAC OS Driver Utility Ins...

Страница 3: ...stallation 7 3 1 Installation Process 7 3 2 Uninstalling the MAC OS Driver 12 4 Wireless LAN Basics 13 5 IP Address 14 6 Wireless Network Configuration 15 6 1 Utility Icon 15 6 2 Client Mode Default S...

Страница 4: ...and WPA2 encryption schemes Fully featured software utility for easy configuration and management CE R TTE certified solution RoHS REACH and WEEE compliant 1 2 Optional Features DC power input 3 3V o...

Страница 5: ...tivate the autorun installation program after you click the exe application All module drivers for the relevant host operating can be found on our website Click here for downloadable drivers Step 1 Do...

Страница 6: ...Copyright LM Technologies Ltd Page 6 of 29 www lm technologies com LM821 User Manual Installing configuring Realtek utility Installing Drivers Step 3 Click Finish to complete installation...

Страница 7: ...AC OS version from LM821 product page Click here for downloadable drivers Step 2 Save the installable file on the MAC Step 3 Please ensure there are no other Realtek USB module drivers already install...

Страница 8: ...age 8 of 29 www lm technologies com LM821 User Manual Step 5 Make sure the LM821 is unplugged from the USB port Unzip the driver file and start the installation Step 6 Wait for the installation to fin...

Страница 9: ...821 module to the USB port The Wireless Network Utility will launch automatically and a message will appear to enable WLANcard Step 8 Open the Network Preferences and a pop up message will appear stat...

Страница 10: ...ables the selected Ethernet interface and the Wireless Network Utility detects the LM821 The MAC address of the LM821 and link status is updated on the Wireless Network Utility window Step 10 Check th...

Страница 11: ...echnologies com LM821 User Manual Step 12 Once the network is connected the LM821 network interface should appear as connected in the Network Preferences and on the Link Status window the signal stren...

Страница 12: ...tracted Step 2 You would need the root password to uninstall the driver Enter the password when prompted in the terminal Step 3 Once the password is provided the script will uninstall the driver Note...

Страница 13: ...Basic Service Set PCs in this group can use their wireless LAN cards to communicate with each other but cannot connect to the Internet The main difference between Infrastructure wireless networks and...

Страница 14: ...on a network is identified by a unique IP address There are two methods to assign an IP address to a computer on a TCP IP network Static IP addressing Dynamic IP addressing DHCP Client In networks wi...

Страница 15: ...desktop an icon should appear in the Windows System Tray automatically 6 1 Utility Icon Client mode utility running but no module plugged in Client mode utility running and module connected to scan a...

Страница 16: ...y and strength of the link between the node and its Access Point Link Quality is a measurement of the receiving and transmitting performances over the radio Network Address displays current MAC Addres...

Страница 17: ...radio reaches Select the SSID BSSID you want to connect with Click Refresh button to rescan available networks Select one of SSIDs and click Add to Profile to create profile that can be configured wi...

Страница 18: ...M821 User Manual 6 6 Status Status tab shows all wireless networking and device driver versions in details 6 7 Statistics Statistics tab shows real time TX RX relative counters to check or evaluate th...

Страница 19: ...LM821 User Manual 6 8 Wi Fi Protected Setup For an easy and secure setup solution for WiFi network you can select PIN Code or Push Button methods to connect to an AP Pin method Step 1 Push the PIN but...

Страница 20: ...logies Ltd Page 20 of 29 www lm technologies com LM821 User Manual Step 3 Select AP that you want to configure Step 4 Wait for configuring your wireless AP to be the security setting PBC method Step 1...

Страница 21: ...Ltd Page 21 of 29 www lm technologies com LM821 User Manual Step 2 Push the physical button on your AP or visual button on the WPS config page Soft AP Step 1 Click Access Point to change AP mode Step...

Страница 22: ...Copyright LM Technologies Ltd Page 22 of 29 www lm technologies com LM821 User Manual Step 3 Setting SSID and Security Step 4 Select the Ethernet controller and click Apply to bridge your Soft AP...

Страница 23: ...V1 6 1 EN 301 489 17 V1 2 1 EN 60950 1 2001 This equipment is marked with the symbol and can be used throughout the European community Marking by the symbol indicates that usage restrictions apply Fra...

Страница 24: ...annel centre frequencies and regulatory domains of each 22 MHz wide channel are shown in following Table Channel Identifier Frequency MHZ Regulatory Domains Japan ETSI North America Israel France Outd...

Страница 25: ...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...

Страница 26: ...e 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 bu...

Страница 27: ...ea 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...

Страница 28: ...ds 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 pr...

Страница 29: ...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 pre...

Страница 30: ...dio TV technician for help NOTE 2 Any changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment FCC...

Страница 31: ...ensuring compliance with the module s installed and fully operational For example if a host was previously authorized as an unintentional radiator under the Declaration of Conformity procedure withou...

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