D-Link Router DIR-855 User Manual

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Appendix A - Wireless Basics
D-Link wireless products are based on industry standards to provide easy-to-use and compatible high-speed wireless connectivity 
within your home, business or public access wireless networks. Strictly adhering to the IEEE standard, the D-Link wireless family 
of products will allow you to securely access the data you want, when and where you want it. You will be able to enjoy the freedom 
that wireless networking delivers.
A wireless local area network (WLAN) is a cellular computer network that transmits and receives data with radio signals instead of 
wires. Wireless LANs are used increasingly in both home and office environments, and public areas such as airports, coffee shops 
and universities. Innovative ways to utilize WLAN technology are helping people to work and communicate more efficiently. Increased 
mobility and the absence of cabling and other fixed infrastructure have proven to be beneficial for many users. 
Wireless  users  can  use  the  same  applications  they  use  on  a  wired  network.    Wireless  adapter  cards  used  on  laptop  and  desktop 
systems support the same protocols as Ethernet adapter cards. 
Under many circumstances, it may be desirable for mobile network devices to link to a conventional Ethernet LAN in order to use 
servers,  printers  or  an  Internet  connection  supplied  through  the  wired  LAN.    A  Wireless  Router  is  a  device  used  to  provide  this 
link.
Wireless Basics 
						

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Appendix A - Wireless Basics
What is Wireless?
Wireless  or  Wi-Fi  technology  is  another  way  of  connecting  your  computer  to  the  network  without  using  wires.  Wi-Fi  uses  radio 
frequency to connect wirelessly, so you have the freedom to connect computers anywhere in your home or office network.
Why D-Link Wireless? 
  
D-Link is the worldwide leader and award winning designer, developer, and manufacturer of networking products. D-Link delivers 
the performance you need at a price you can afford. D-Link has all the p\
roducts you need to build your network.
How does wireless work? 
  
Wireless works similar to how cordless phone work, through radio signals to transmit data from one point A to point B. But wireless 
technology has restrictions as to how you can access the network. You must be within the wireless network range area to be able 
to connect your computer. There are two different types of wireless networks Wireless Local Area Network (WLAN), and Wireless 
Personal Area Network (WPAN).
Wireless Local Area Network (WLAN)
In a wireless local area network, a device called an Access Point (AP) connects computers to the network. The access point has a 
small antenna attached to it, which allows it to transmit data back and forth over radio signals. With an indoor access point as seen 
in the picture, the signal can travel up to 300 feet. With an outdoor access point the signal can reach out up to 30 miles to serve 
places  like  manufacturing  plants,  industrial  locations,  college  and  high  school  campuses,  airports,  golf  courses,  and  many  other 
outdoor venues.
Wireless Personal Area Network (WPAN) 
						

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Appendix A - Wireless Basics
Bluetooth is the industry standard wireless technology used for WPAN. Bluetooth devices in WPAN operate in a range up to 30 feet 
away.
Compared to WLAN the speed and wireless operation range are both less than WLAN, but in return it doesn’t use nearly as much 
power which makes it ideal for personal devices, such as mobile phones, PDAs, headphones, laptops, speakers, and other devices 
that operate on batteries.
Who uses wireless? 
  
Wireless technology as become so popular in recent years that almost everyone is using it, whether it’s for home, office, business, 
D-Link has a wireless solution for it.
Home
 • Gives everyone at home broadband access
 • Surf the web, check email, instant message, and etc
 • Gets rid of the cables around the house
 • Simple and easy to use
 
Small Office and Home Office
 • Stay on top of everything at home as you would at office
 • Remotely access your office network from home
 • Share Internet connection and printer with multiple computers
 • No need to dedicate office space
 
 
  
						

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Appendix A - Wireless Basics
Where is wireless used? 
  
Wireless technology is expanding everywhere not just at home or office. People like the freedom of mobility and it’s becoming so 
popular that more and more public facilities now provide wireless access to attract people. The wireless connection in public places 
is usually called “hotspots”.
Using  a  D-Link  Cardbus  Adapter  with  your  laptop,  you  can  access  the  hotspot  to  connect  to  Internet  from  remote  locations  like: 
Airports, Hotels, Coffee Shops, Libraries, Restaurants, and Convention C\
enters.
Wireless network is easy to setup, but if you’re installing it for the first time it could be quite a task not knowing where to start. That’s 
why we’ve put together a few setup steps and tips to help you through\
 the process of setting up a wireless network.
Tips
Here are a few things to keep in mind, when you install a wireless netwo\
rk.
Centralize your router or Access Point
  
Make sure you place the router/access point in a centralized location within your network for the best performance. Try to place the 
router/access point  as  high  as  possible  in  the  room,  so  the  signal  gets  dispersed  throughout  your  home.  If  you  have  a  two-story 
home, you may need a repeater to boost the signal to extend the range.
Eliminate Interference 
  
Place  home  appliances  such  as  cordless  telephones,  microwaves,  and  televisions  as  far  away  as  possible  from  the  router/access 
point. This would significantly reduce any interference that the appliances might cause since they operate on same frequency.
Security  
						

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Appendix A - Wireless Basics
  
Don’t let you next-door neighbors or intruders connect to your wireless network. Secure your wireless network by turning on the 
WPA or WEP security feature on the router. Refer to product manual for d\
etail information on how to set it up.
 
 
   There are basically two modes of networking: 
• Infrastructure – All wireless clients will connect to an access point or wireless r\
outer.
• Ad-Hoc – Directly connecting to another computer, for peer-to-peer communication, using wireless network adapters 
on each computer, such as two or more DIR-855 wireless network Cardbus a\
dapters.
An Infrastructure network contains an Access Point or wireless router. All the wireless devices, or clients, will connect to the wireless 
router or access point. 
An Ad-Hoc network contains only clients, such as laptops with wireless cardbus adapters. All the adapters must be in Ad-Hoc mode 
to communicate.
Wireless Modes 
						

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Appendix B - Networking Basics
Networking Basics
Check your IP address
After you install your new D-Link adapter, by default, the TCP/IP settings should be set to obtain an IP address from a DHCP server 
(i.e. wireless router) automatically. To verify your IP address, pleas\
e follow the steps below.
Click on Start > Run. In the run box type cmd and click OK. (Windows Vista® users type cmd in the Start Search box.)
At the prompt, type ipconfig and press Enter.
This  will  display  the  IP  address,  subnet  mask,  and  the 
default gateway of your adapter.
If the address is 0.0.0.0, check your adapter installation, 
security settings, and the settings on your router. Some 
firewall software programs may block a DHCP request 
on newly installed adapters.  
						

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Appendix B - Networking Basics
Statically Assign an IP address
If you are not using a DHCP capable gateway/router, or you need to assig\
n a static IP address, please follow the steps below:
Step 1
Windows Vista® - Click  on Start  > Control  Panel  > Network  and  Internet  > Network  and  Sharing  Center  > Manage  Network 
Connections.
Windows® XP -  Click on Start > Control Panel > Network Connections.
Windows® 2000 - From the desktop, right-click My Network Places > Properties.
Step 2
Right-click on the Local Area Connection which represents your network adapter and select Properties.
Step 3
Highlight Internet Protocol (TCP/IP) and click Properties.
Step 4
Click Use the following IP address and enter an IP address that is on the same subnet as 
your network or the LAN IP address on your router. 
Example: If the router´s LAN IP address is 192.168.0.1, make your IP address 192.168.0.X 
where  X  is  a  number  between  2  and  99.  Make  sure  that  the  number  you  choose  is  not  in 
use  on  the  network.  Set  Default  Gateway  the  same  as  the  LAN  IP  address  of  your  router 
(192.168.0.1). 
Set Primary DNS the same as the LAN IP address of your router (192.168.0.1). The Secondary 
DNS is not needed or you may enter a DNS server from your ISP.
Step 5
Click OK twice to save your settings. 
						

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Appendix C - Technical Specifications
Technical Specifications
Standards
 • IEEE 802.11n (draft)
 • IEEE 802.11g
 • IEEE 802.11a
 • IEEE 802.3
 • IEEE 802.3u
Security
 • WPA-Personal
 • WPA2-Personal
 • WPA-Enterprise
 • WPA2-Enterprise
 
Wireless Signal Rates*
 • 108Mbps     • 48Mbps
 • 54Mbps     • 24Mbps
 • 36Mbps    • 12Mbps
 • 18Mbps     • 9Mbps
 • 11Mbps     • 5.5Mbps
 • 6Mbps     • 1Mbps
 • 2Mbps      
 MSC (0-15)
 • 130Mbps (270)  • 117Mbps (243)
 • 104Mbps (216)  • 78Mbps (162)
 • 66Mbps (135)  • 58.5Mbps (121.5)
 • 52Mbps (108)  • 39Mbps (81)
 • 26Mbps (54)  • 19.5Mbps (40.5)
 • 12Mbps (27)  • 6.5Mbps (13.5) 
Frequency Range
 • 2.4GHz to 2.483GHz (802.11g/n)
 • 5.15GHz to 5.825GHz (802.11a)
Transmitter Output Power
 • 15dBm ± 2dB
External Antenna Type
 • Three (3) detachable reverse SMA Antennas
Operating Temperature
 • 32°F to 131°F ( 0°C to 55°C)
Humidity
 • 95% maximum (non-condensing)
Safety & Emissions
 • FCC  
 • CE
 • IC
Dimensions
 • L = 7.6 inches
 • W = 4.6 inches
 • H = 1.2inches
Warranty
 • 1 Year
*  Maximum wireless signal rate derived from IEEE Standard 802.11g, 802.11a, and Draft 802.11n specifications. Actual data throughput will vary. Network conditions and environmental 
factors, including volume of network traffic, building materials and construction, and network overhead, lower actual data throughput rate. Environmental factors will adversely affect 
wireless signal range. 
						

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Appendix D - Warranty
CE Mark Warning:
This is a Class B product. In a domestic environment, this product may cause radio interference, in which case the user may be required to take adequate 
measures.
FCC 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 i\
nterference 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.
IMPORTANT NOTICE:
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. To maintain compliance with FCC RF exposure compliance requirements, please avoid 
direct contact to the transmitting antenna during transmitting.
If this device is going to be operated in 5.15 ~ 5.25GHz frequency range, then it is restricted in indoor environment only. This transmitter must not be co-
located or operating in conjunction with any other antenna or transmitte\
r.
The availability of some specific channels and/or operational frequency bands are country dependent and are firmware programmed at the factory to match 
the intended destination. The firmware setting is not accessible by the end user. 
						

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Appendix D - Warranty
ICC Notice:
Operation is subject to the following two conditions:
 1) This device may not cause interference and
 2) This device must accept any interference, including interference tha\
t may cause undesired operation of the device.
 
IMPORTANT NOTE:
IC Radiation Exposure Statement:
This  equipment  complies  with  IC  radiation  exposure  limits  set  forth  for  an  uncontrolled  environment.  End  users  must  follow  the  specific  operating 
instructions for satisfying RF exposure compliance. 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.
(i) The  device  for  the  band  5150-5250  MHz  is  only  for  indoor  usage  to  reduce  potential  for  harmful  interference  to 
co-channel mobile satellite systems;
(ii) The maximum antenna gain (2dBi) permitted (for devices in the band 5725-5825 MHz) to comply with the e.i.r.p. limits specified for 
point-to-point and non point-to-point operation as appropriate, as state\
d in section A9.2(3).
In addition, users should also be cautioned to take note that high-power radars are allocated as primary users (meaning they have priority) of the bands 
5250-5350 MHz and 5650-5850 MHz and these radars could cause interferenc\
e and/or damage to LE-LAN devices.
Règlement d’Industry Canada 
  Les conditions de fonctionnement sont sujettes à deux conditions:
(1) Ce périphérique ne doit pas causer d’interférence et.
(2) Ce  périphérique  doit  accepter  toute  interférence,  y  compris  les  interférences  pouvant  perturber  le  bon  fonctionnement  de  ce 
périphérique.