D-Link Router DIR-655 User Manual

							

D-Lnk DIR-655 User Manual
Secton 6 - Troubleshootng
 
You should start at 1472 and work your way down by 10 each time. Once you get a reply, go up by 2 until you get a 
fragmented packet. Take that value and add 28 to the value to account for the various TCP/IP headers. For example, 
lets  say  that  1452  was  the  proper  value,  the  actual  MTU  size  would  be  1480,  which  is  the  optimum  for  the  network 
we’re working with (1452+28=1480). 
Once you find your MTU, you can now configure your router with the proper MTU size. 
To change the MTU rate on your router follow the steps below: 
• Open your browser, enter the IP address of your router (192.168.0.\
1) and click OK. 
• Enter your username (admin) and password (blank by default). Click OK to enter the web configuration 
page for the device. 
• Click on Setup and then click Manual Configure.  
• To change the MTU enter the number in the MTU field and click Save Settings to save your settings. 
•  Test  your  email.  If  changing  the  MTU  does  not  resolve  the  problem,  continue  changing  the  MTU  in 
increments of ten. 
  
						

							

D-Lnk DIR-655 User Manual
Appendx A - Wreless Bascs
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 deliv\
ers.
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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Appendx A - Wreless Bascs
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 products 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. 
						

							
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D-Lnk DIR-655 User Manual
Appendx A - Wreless Bascs
Wireless Personal Area Network (WPAN)
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
 
 
  
						

							

D-Lnk DIR-655 User Manual
Appendx A - Wreless Bascs
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 Centers.
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 signa\
l 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. 
						

							

D-Lnk DIR-655 User Manual
Appendx A - Wreless Bascs
Security 
  
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 manua\
l for detail 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-655 wireless network \
Cardbus adapters.
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 
						

							

D-Lnk DIR-655 User Manual
Appendx B - Networkng Bascs
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, please 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. 
If you are connecting to a wireless network at a hotspot (e.g. hotel, coffee shop, airport), please contact an employee 
or administrator to verify their wireless network settings. 
						

							

D-Lnk DIR-655 User Manual
Appendx B - Networkng Bascs
Statically Assign an IP address
If you are not using a DHCP capable gateway/router, or you need to assign 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 D-Link 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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D-L

nk DIR-655 User Manual
Append  x C - Techn  cal Spec  ficat  ons
Technical Specifications
Standards
 • IEEE 802.11n (draft)
 • IEEE 802.11g
 • 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
Transmitter Output Power
15dBm ± 2dB
External Antenna Type
Three (3) detachable reverse SMA Antennas
LEDs
 • Power    • Internet     • Status
 • WLAN    • LAN (10/100)   • USB
Operating Temperature
32°F to 131°F ( 0°C to 55°C)
Humidity
95% maximum (non-condensing)
Safety & Emissions
 • FCC
 • CE
Dimensions
 • L = 7.6 inches
 • W = 4.6 inches
 • H = 1.2inches
*  Maximum  wireless  signal  rate  derived  from  IEEE  Standard  802.11g  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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D-Lnk DIR-655 User Manual
Appendx D - Warranty
Copyright ©2008 by D-Link Corporation/D-Link Systems, Inc. All rights reserved.
CE Mark Warning:
This is a Class B product. In a domestic environment, this product may c\
ause 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 agains\
t harmful interference in a residential installation. 
This equipment generates, uses, and can radiate radio frequency energy a\
nd, if not installed and used in accordance with the 
instructions, may cause harmful interference to radio communication. How\
ever, 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 t\
o try to correct the interference by one or more 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 th\
at to which the receiver is connected.
 • Consult the dealer or an experienced radio/TV technician for help.
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.\
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 dev\
ice must accept any 
interference received, including interference that may cause undesired o\
peration.
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 be\
tween the radiator & your body. This 
transmitter must not be co-located or operating in conjunction with any \
other antenna or transmitter.
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.