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Features of the cable:

As shown in figure 1, Category 7 or Class F cable has four individually foiled twisted pairs that are bundled together and surrounded by either an additional foil(F/FTP) or braided screen (S/FTP). The redundant screening or shielding provides more consistent transmission characteristics among each of the pairs.It also substantially reduces inter-pair and alien crosstalk.
Inter-pair crosstalk is the tendency for signals carried by one pair to interfere with one or more of the other four pairs in the cable. Alien crosstalk describes the condition where interfering signals are coupled into a cable from another adjacent cable, a nearby power source, wireless communications device or electrical equipment. Unlike Category 5/6 cable, the individually shielded pairs don’t rely on varying twist rates to control crosstalk. Each pair is twisted at nearly an identical rate, rendering closely matched propagation speeds. This minimizes inter-pair skew.

Despite its differences in construction and specifications, Category 7 can support legacy Category 5/6 infrastructure. Cross connection patch cables and patch panels are available to adapt standard RJ-45 connections to the Category 7 environment.

Figure 1



























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Here are some of the things that I did that helps make Firefox more faster:

1. Type about:config into the Firefox URL/address bar and hit ENTER. You will be warned that you might void your warranty if you change some advanced settings, but just go on and trust me :-)

2. Inside the Firefox configuration page, scroll down and look for the following entries:

network.http.pipelining
network.http.proxy.pipelining

Set their values to “true” by double-clicking each one of them.

3. Next up, find this entry:

network.http.pipelining.maxrequests

Double-click and set the value to 30.

4. Right-click anywhere inside the config page and select New --> Integer. Name it nglayout.initialpaint.delay and set the value to “0″.

That's all...

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The following diagram shows the Normal use of Crossed and Straight cables (see also the notes below).

Notes:

1.We show Straight cables as BLUE and Crossed as RED. That is our convention. The cable color can be anything you choose or, more likely, the vendor decides.

2.To avoid the need for Crossed cables many vendors provide UPLINK ports on Hubs or Switches - these are specially designed to allow the use of a STRAIGHT cable when connecting back-to-back Hubs or Switches. Read the manufacturers documentation carefully.

3.Increasingly vendor hubs (can you still buy them) and switches will auto-detect the connection type and internally switch the connectors so that STRAIGHT cables can be used everywhere.

Original Post from www.zytrax.com

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