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56k Access

We all want the best connection that we can get. AT&T Worldnet Service provides modems that support 56k access.

What is 56k access?

When someone mentions 56k access, they are talking about using modems that can send data over conventional phone lines at up to 56 kbps. These modems can download at up to 56 kbps, but upload at a maximum of 33.6 kbps. Actually, the maximum download speed is 53 kbps in the US because the FCC restricts the power needed to run at 56 kbps on a conventional phone line. In addition, an upload speed greater than 28.8 kbps is very unusual.

You can find additional information at the following sites:

Can I expect to get this speed?

Even though these modems are technically capable of operating at these speeds, in reality, hardly anyone will realize them. Studies have been done that show that the speeds will average something less than that. In addition to some of the sites shown above, the following sites also touch upon that subject:

How do I know if my lines are capable of supporting 56k?

US Robotics has supplied a test that will show if your line is capable of supporting 56k. You can use any brand V.34 or better modem to take this test. We've provided step-by-step instructions if you feel that you need them.

Note: This test can't see all problems that might be present, and it does NOT check the route to your AT&T Worldnet access number.

Which is the best modem to get?

You should get one that work best with your ISP. Since most of the WN access numbers are X2/V.90 an X2/V.90 would usually be the best choice.

Upgrading considerations

As the table below illustrates, all 3Com x2 modems, both client and server, will continue to support x2 technology when they are upgraded to V.90. Users who do not upgrade to the standard will be able to connect to digital modems with 3Com's x2 technology for high-speed downloads. Client x2 modems that are not upgraded to the standard will only receive a V.34 connection when they call a digital modem that was originally K56flex, even if it has been upgraded to the standard.

  x2 Server K56flex Server 3Com V.90 Server Other V.90 Server V.34 Server
x2 Client 56K V.34 56K V.34 V.34
K56flex Client V.34 56K V.34 ** V.34
3Com V.90 Client 56K V.34 56K 56K V.34
Other V.90 Client V.34 ** 56K 56K V.34
V.34 Client V.34 V.34 V.34 V.34 V.34

** Backward compatibility is up to individual manufacturers

For additional information, check out the following page:
Getting a 56K Connection

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Need Additional Help?

If you can't find the answers you need, please try:

  1. The help file for the application you are using.
  2. Our FAQs.
  3. The AT&T Worldnet Help Newsgroups.
Note: AT&T DSL Service support is available at http://dslhelp.att.net