Ethernet cords it there a cord that hooks one end to the wall at the dsl filter and has a smaller head and the other end has a regular size ethernet head to connect to the wireless box?

So do you have internet service at the house? If so you can plug the ethernet cable from the modem directly into the computer's ethernet port.

If you're talking about directly connecting to your cell phone, then the phone has to have the built in router in it. If it does, you can connect your computer to it wirelessly.

If you're talking about a regular old house phone (land line) then you would be very slow if you could get it connected. I don't think the newer models of computers even have a modem port to connect a telephone line into it. But basically you would still need a internet service provider to connect it.

Bear in mind that there is a difference between the phone cord and the ethernet cord. The phone cord is smaller in size and the end that plugs in is smaller.

How you connect it depends on how you plan to use it. Let me explain:

Some people have a dsl line (high speed internet connection) and their modem from their internet provider only has room for one computer cable to connect and use the internet. If the customer has more then one desktop computer they want to connect to the internet, they will need to buy a router. A router provides multiple ports for several computers to connect to the internet at the same time.

If you have a dsl modem already and bought a router to add additional computers to your network - then follow the instructions below to set it up:

Connect your phone cord from the wall into the dsl modem. Plug in the power cable from the dsl modem to the wall and turn it on. Connect an ethernet cable to the dsl modem (ethernet cables are the ones that look like a regular telephone cord but the ends are a little larger) and connect the other end to your router. Make sure you plug this cable into the port marked "ethernet" on your router. There is only one port for your internet connection line coming into the router, the rest of the ports are for adding computers only. Some routers say the word "ethernet" near the port for the internet connection. Others have a picture near or or brackets around it to show that it is different then the others. Plug in the power cord to your router and turn it on. Make sure you turn on your modem first and let it warm up before connecting your router. Modem power on first, then router power on - always.

Now connect an ethernet cable to your router and connect the other end to the pc you wish to use on the internet. Do not turn on your pc until the ethernet cord is attached. Your dsl modem has to be powered up first, followed by your router and then your pc. All in that order.

Your computer should automatically sense the internet connection upon start up. You can verify that your connection is installed correctly and that your pc is sensing it by looking at the bottom right side of your screen near the clock area. You should see a picture of a computer monitor that represents your internet connection status. Sometimes they glow green when they are healthy. Sometimes they show a red X on top of them if they are disconnected from the internet. If you can't find the Icon for your internet connection on the bottom right side of your screen, unplug the ethernet cable from the back of your pc - while watching the bottom right side area and plug it back in again. Watch for a change to locate the icon. Sometimes there is a downward pointing arrow near the clock which needs to be clicked on to open up the area and view the icons.

Thats all! One line from the modem to the router - another line from the router to the pc - and the internet should be up and running fine.

If you bought a router combination modem - then its the same as above - just without a separate dsl modem. (i.e. Connect the power cable from the router/modem to the wall. Connect the ethernet cable to the port marked "ethernet" for your internet connecton and connect the other end of the cord to your pc. Then turn your pc on. Router/modem power on first and pc power on second in that order)

All the lights on your modem should be green and steady - except for the one marked internet or connection which is usually flashing and moving. If you have any red or yellow lights then you need to troubleshoot and correct the problem before your internet connection will work.

You need the regular phone plug - it is slightly narrower than the Ethernet plug and they are NOT the same.

Westell makes a line of broadband home networking products that enable residential customers and users in small businesses to access and share broadband services. These inexpensive DSL router/modems offer multi-users Internet LAN access for home or business applications. The Westell router/modems allow you to have the benefits of the "always on" high-speed broadband Internet connection without losing the ability to receive voice calls over the same phone line.

1. Step 1 Connect one end of the Ethernet cable to the computer's Ethernet port. Connect the other end to the Ethernet port on the back of the Westell router.
   
2. Step 2 Connect the barrel end of the router's power cord to the connector labeled "12 v" on the back of the router. Plug the other end of the power cord into a wall outlet.
   
3. Step 3 Connect one end of the DSL phone cable to the DSL line jack on the back of the router. Connect the other end to the wall jack.
   
4. Step 4 Wait for the Ready and the Link LEDs to glow steady green. The router is now ready to use.
   

It will say 'off the hook' if the line is in use. There should be dial tone on the line before you can fax something.

Goodluck!

Fax machines need an RJ-11 phone cord and are ANALOG

DSL uses RJ-45 and is DIGITAL.

Don't waste your money on a DSL filter, they won't work reliably.

Set up PPPoE on the router

From ethernet of embarq plug it to the Internet port of Linksys. Your PC should be connected to port 1 of Linksys

To test your fax setup
1 Press Setup.
2 Press 6, and then press 5.
This displays the Tools menu and then selects Run Fax Test.
The HP all-in-one displays the status of the test on the color graphics display and prints a report.

3 Review the report.
– If the test passes and you are still having problems faxing, check the fax
settings listed in the report to verify the settings are correct. A blank or
incorrect fax setting can cause faxing problems.
– If the test fails, review the report for information on how to fix any problems
found. For more information, you can also see the next section, The fax test
failed.
4 Press OK to return to the Setup Menu.

Make sure you used the phone cord supplied in the box with your HP all-in-one
to connect to the telephone wall jack. One end of this special 2-wire phone
cord should be connected to the port labeled "1-LINE" on the back of your
HP all-in-one and the other end to your telephone wall jack

This special 2-wire cord is different from the more common 4-wire phone cords
you might already have in your home or office. Check the end of the cord and
compare it to the two types of cords shown below.

If you used the 4-wire phone cord, disconnect it, find the supplied 2-wire cord,
and then connect the 2-wire cord to the port labeled "1-LINE" on the back of
your HP all-in-one. For more information on connecting this phone cord and
setting up your HP all-in-one for faxing, see Fax setup.
If the supplied phone cord is not long enough, you can extend it. For
information see The phone cord that came with my HP all-in-one is not long
enough.
● Try connecting a working phone and phone cord to the telephone wall jack
that you are using for the HP all-in-one and check for a dial tone. If you do not
hear a dial tone, contact your telephone company and have them check the
line.
● Other equipment, which uses the same phone line as the HP all-in-one, might
be in use. For example, you cannot use your HP all-in-one for faxing if an
extension phone is off hook, or if you are using your PC modem to send an email
or access the Internet.
● The phone line connection might be noisy. Phone lines with poor sound quality
(noise) can cause faxing problems. Check the sound quality of the phone line
by plugging a phone into the telephone wall jack and listening for static or
other noise. If you hear noise, turn Error Correction Mode (ECM) off and try
faxing again. For information, see Use error correction mode. If the problem
persists, contact your telephone company.
● If you are using a digital subscriber line (DSL) service, make sure that you
have a DSL filter connected or you will not be able to fax successfully. The
DSL filter removes the digital signal and allows your HP all-in-one to
communicate properly with the phone line. Obtain a DSL filter from your DSL
provider. If you already have a DSL filter, make sure it is connected correctly.
Make sure your HP all-in-one is not connected to a telephone wall jack that is
set up for digital phones. To check if your phone line is digital, connect a
regular analog phone to the line and listen for a dial tone. If you do not hear a
normal sounding dial tone, it might be a phone line set up for digital phones.
● If you are using either a private branch exchange (PBX) or an integrated
services digital network (ISDN) converter/terminal adapter, make sure the
HP all-in-one is connected to the port that is designated for fax and phone
use. Also, make sure that the terminal adapter is set to the correct switch type
for your country/region, if possible.
Note that some ISDN systems allow you to configure the ports for specific
phone equipment. For example, you might have assigned one port for
telephone and Group 3 fax and another port for multiple purposes. If you
continue to have problems when connected to the fax/phone port, try using the
port designated for multiple purposes; it might be labeled "multi-combi" or
something similar. For information on setting up your HP all-in-one with a PBX
phone system or ISDN line

you may also refer to the manual for this unit here
if you go there please refer to page 82 of the manual or chapter 10

try the other side also did your service provider send it to you.