25D-Link DIR-635 User Manual
Section 3 - Configuration
Check  the  box  to  enable  the  wireless  function.  If  you  do  not 
want to use wireless, uncheck the box to disable all the wireless 
functions.
Service Set Identifier (SSID) is the name of your wireless network. 
Create  a name  using  up  to  32  characters. The SSID  is  case-
sensitive.
The  Auto  Channel  Scan  setting  can  be  selected  to  allow 
the  DIR-635  to  choose  the  channel  with  the  least  amount  of 
interference.
Indicates  the  channel  setting  for  the  DIR-635.  By  default  the 
channel is set to 6. The Channel can be changed to fit the channel 
setting  for  an  existing  wireless  network  or  to  customize  the 
wireless network. If you enable Auto Channel Scan, this option 
will be greyed out.
Select one of the following:
802.11g Only - Select if all of your wireless clients are 802.11g.
Mixed 802.11g and 802.11b - Select if you are using both 802.11b and 802.11g wireless clients.
802.11b Only - Select if all of your wireless clients are 802.11b.
802.11n Only - Select only if all of your wireless clients are 802.11n.
Mixed 802.11n, 802.11b, and 802.11g - Select if you are using a mix of 802.11n, 11g, and 11b wireless clients.
Select the Channel Width:
40MHz - Select if you are using all 802.11n devices for maximum performance.
Auto 20/40 - This is the default setting. Select if you are using both 802.11n and non-802.11n wireless devices.
20MHz - Select if you are not using any 802.11n wireless clients.
Select the transmit rate. It is strongly suggested to select Best (Auto) for best performance.
Enable Wireless:
Enable Auto 
Channel Scan:
Wireless Settings
Wireless Network 
Name:
Wireless Channel:
802.11 Mode:
Channel Width:
Transmission Rate: