D-Link Router DIR-301 User Manual

							
1D-Link DIR-301 User Manual
Section  - Troubleshooting
3. Why can’t I connect to certain sites or send and receive emails when connecting through my router? 
If you are having a problem sending or receiving email, or connecting to secure sites such as eBay, banking sites, and 
Hotmail, we suggest lowering the MTU in increments of ten (Ex. 1492, 1482, 1472, etc). 
Note: AOL DSL+ users must use MTU of 1400. 
To find the proper MTU Size, you’ll have to do a special ping of the destination you’re trying to go to. A destination could 
be another computer, or a URL. 
• Click on Start and then click Run. 
• Windows® 95, 98, and Me users type in command (Windows® NT, 2000, and XP users type in cmd) and 
press Enter (or click OK). 
• Once the window opens, you’ll need to do a special ping. Use the following syntax: 
 ping [url] [-f] [-l] [MTU value]
 
Example: ping yahoo.com -f -l 1472  
						

							
D-Link DIR-301 User Manual
Section  - Troubleshooting
 
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 the Save Settings button to save your 
settings. 
•  Test  your  email.  If  changing  the  MTU  does  not  resolve  the  problem,  continue  changing  the  MTU  in 
increments of ten. 
  
						

							
3D-Link DIR-301 User Manual
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 
						

							
D-Link DIR-301 User Manual
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 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. 
						

							
D-Link DIR-301 User Manual
Appendix A - Wireless Basics
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-Link DIR-301 User Manual
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 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 network.
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. 
						

							
D-Link DIR-301 User Manual
Appendix A - Wireless Basics
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 manual 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 WNA-2330 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-Link DIR-301 User Manual
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, please follow the steps below.
Click on Start > Run. In the run box type cmd and click OK.
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-Link DIR-301 User Manual
Appendix B - Networking Basics
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® 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. 
						

							
0D-Link DIR-301 User Manual
Appendix C - Technical Specifications
Technical Specifications
Standards
 • IEEE 802.11g
  • IEEE 802.11b
  • IEEE 802.3
  • IEEE 802.3u
Wireless Signal Rates*
 • 54Mbps   • 48Mbps
  • 36Mbps  • 24Mbps
  • 18Mbps   • 12Mbps
  • 11Mbps   • 9Mbps
  • 6Mbps   • 5.5Mbps
  • 2Mbps   • 1Mbps
Security
 • WPA - Wi-Fi Protected Access (TKIP, MIC,
    IV Expansion, Shared Key Authentication)
  • 802.1x
  • 64/128-bit WEP
Modulation Technology
Orthogonal Frequency Division Multiplexing (OFDM)
Receiver Sensitivity
 • 54Mbps OFDM, 10% PER,-68dBm)
  • 48Mbps OFDM, 10% PER,-68dBm)
  • 36Mbps OFDM, 10% PER,-75dBm)
  • 24Mbps OFDM, 10% PER,-79dBm)
  • 18Mbps OFDM, 10% PER,-82dBm)
  • 12Mbps OFDM, 10% PER,-84dBm)  
• 11Mbps CCK,      8% PER,-82dBm)
  • 9Mbps OFDM, 10% PER,-87dBm)
  • 6Mbps OFDM, 10% PER,-88dBm)
  • 5.5Mbps CCK, 8% PER,-85dBm)
  • 2Mbps QPSK, 8% PER,-86dBm)
  • 1Mbps BPSK, 8% PER,-89dBm)
VPN Pass Through/ Multi-Sessions
 • PPTP 
  • L2TP
  • IPSec
Device Management
 •   We b - b a s e d   I n t e r n e t   E x p l o r e r   v 6   o r   l a t e r ;  N e t s c a p e 
 
     Navigator v6 or later; or other Java-enabled browsers
  • DHCP Server and Client
Wireless Frequency Range
2.4GHz to 2.462GHz
Wireless Operating Range2
 • Indoors - up to 328 ft. (100 meters)
  • Outdoors- up to 1312 ft. (400 meters)
Wireless Transmit Power
15dBm ± 2dBm
External Antenna Type
Single detachable reverse SMA