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2.0 General Questions

Receive/Downstream: -15dbmV to +15dbmV
Transmit/Upstream: 30dbmV to 55dbmV
Signal to Noise Ratio(SNR): 30dB or Greater

Note: If your power levels are out of range, it can cause packet loss, re-transmissions which will eventually lead to speed loss..Otherwise Signals have nothing to do with your speed.

by redxii See Profile edited by drake See Profile
last modified: 2004-05-29 20:20:49

The terms one-way and two-way are used to describe how your computer relays data to the Internet when you are using a cable modem. In a two-way system, your computer uses the cable modem for both sending (uploading) and receiving (downloading) data, allowing for high speeds in both directions. This eliminates the need for a traditional analog modem and phone line when using the Internet. You may still need an analog modem and phone line for other things, such as sending faxes.

In a one-way system, your computer uses the cable modem for receiving (downloading) data, but still requires an analog modem and phone line for sending (uploading) data. The use of an analog modem in a one-way system means that you cannot upload data as fast as you can in a two-way system. Even so, a one-way cable modem system gives you nearly all of the speed benefits of a two-way system. When you browse the Web, you usually upload a URL request or a mouse click. What you get in return is all of the text, graphics, and sound from the page you want to visit. That Web page data will all come back to you through the high speed cable network.

The availability of a two-way system is dependent on the type of coaxial network Charter Communications has deployed in your area. Traditional cable networks are designed to deliver television signals in one direction only and are made up entirely of coaxial cable. Modern cable networks use a hybrid of fiber optic and coaxial cabling (HFC) to provide two-way capabilities. Approximately 85% of all cable networks in the United States are one-way.

Source/Reference

Feedback received on this FAQ entry:
  • in other words, a digital box, or pvr can receive information and send info ( ie, request movies etc,,), but analogue can only receive. Is this correct?

    2009-09-15 11:31:33



by redxii See Profile edited by drake See Profile
last modified: 2004-05-29 20:21:01

Bandwidth is shared from the neighborhood HFC node to your home, so it is possible for performance to vary depending on how many customers are actively using the system at any given time. It is worth noting, however, that this is also true for the Internet as a whole. The Internet is, in essence, one extremely large, shared network.

by redxii See Profile edited by drake See Profile
last modified: 2004-05-29 20:21:19

No! At this time there are no monthly caps for bandwith. Some users have reported receiving letters from their cable company warning them to throttle back on the downloading. If you receive a letter, please contact just_robert See Profile by instant message as per this thread.

There are however newsgroup caps of 5 GB per rolling 30 days as indicated here.

by slash See Profile edited by drake See Profile
last modified: 2004-05-29 20:21:10

You should not notice any difference in service quality between EarthLink and your local cable company as EL provides the service over the same equipment as the cable company.

by slash See Profile edited by drake See Profile
last modified: 2004-09-08 06:14:50