Gateway C-140S Reference Manual page 142

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Your wired Ethernet network is running slower than you
expect
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You cannot connect to your company network
Every network is unique. Contact your company computer
department or network administrator for help.
Internet Explorer is unable to access the Internet
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CHAPTER 9: Troubleshooting
Make sure that the router is plugged into a powered
electrical outlet and turned on. Most routers have lights
that indicate they are working. For more information,
see the documentation that came with your router.
Make sure that all computers on your network have the
same workgroup name.
Make sure that all computers are using the same Subnet
Mask.
If you assigned IP addresses to the computers, make
sure that all computers have different IP addresses. For
home networks, IP addresses should be 192.168.N.N
where N is a number you assign between 0 and 254.
The first N should be the same for all computers on your
network and the second N should be different for all
computers on your network.
If your Ethernet network is running slower than you
expect, check the speed of each Ethernet component.
For best results, all Ethernet components should be
standard Ethernet (10 Mbps), Fast Ethernet (100 Mbps
or 10/100 Mbps), or Gigabit Ethernet (1000 Mbps or
10/100/1000 Mbps). A mixture of Ethernet, Fast
Ethernet, and Gigabit Ethernet components will result
in your network running at the slowest component
speed.
Reset the power on your cable or DSL modem and your
access point. This reestablishes communication
between your Internet Service Provider and your
modem and between your modem and your access
point.
If you previously accessed the Internet through a
dial-up modem, Internet Explorer may not be set up to
access the Internet through a network.