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Fast-forward to the early 1990s and Category 3 cable, which is often called the first modern networking cable, boosted the cable's frequency to 16MHz and Ethernet performance to 10Mbps. By contrast, Category 4 cable pushed this to 20Mhz and roughly 16Mbps but it was used for Token Ring – rather than Ethernet – networks.
So, what is Cat7? It's an Ethernet cable for sure, but you probably don’t need to worry about it. In fact, we’re almost certain you’d be better off with a Cat6A, or Cat 8 Ethernet cable instead. By the numbers Category 7, also known as Cat7, is a cable standard for Ethernet and other networking technologies. A Cat7 network cable usually utilizes four pairs of twisted copper wires. Compared to Category 6 components, Category 7 cabling conforms to stricter guidelines for alien crosstalk and system noise. For interference reduction, shielding is placed on each pair of a Category 7 cable’s twisted copper wires, and then an overall shield covers the entire cable. The Cat7 standard supports 10 Gigabit Ethernet. Reliable Ethernet installations will run Category 7 cable to a maximum length of 100 metres. This cable category can transmit data with frequencies of up to 600 MHz. An Augmented Category 7 standard, referred to as Cat7a, delivers a performance of up to 1000 MHz. Category 7 Cable with SSTP WiringOne additional strength of Cat7 cable over Cat6 is that the newer variant is better shielded against crosstalk and EMI, having been double-shielded (both individual wire twists and the cable as a whole) to meet more stringent specifications in this regard. This is the only out-of-the-box physical difference between most Cat6 and Cat7 cables - while double-shielded designs are now available with Cat6 and even earlier revisions of Ethernet grade wire, it’s part of the core design for Cat7 versions. Alongside its unique launch timeframe , Cat7 has some unique eccentricities where other categories of cable adhere to strict specifications for all parts of their design. Partly because of that, but also because more standard Ethernet cables are now readily available and can compete directly with Cat7 , it's not hugely popular, despite its impressive specifications (especially considering when it was released). But the magic of that higher number means that comparable cables of lower categories are occasionally mis-sold as Cat7 cables instead. In fact, if you come across a Cat7 cable from some other retailer, you’re almost certainly buying a Cat 6A cable.
Those other categories of cable were part of the standard development of Ethernet cables. They improved incrementally generation upon generation and were released in a fairly uniform manner over the years, but Cat 7 was an attempt to leapfrog ahead of that, delivering much greater performance potential years ahead of comparable Ethernet cable designs. NBASE-T is also a game changer. Now, 2.5GBASE-T and 5GBASE-T are realities for existing Cat5e and Cat6 (respectively) unshielded cable installations. These speeds will satisfy all but the most demanding home and small business users. See more about NBASE-T in Just What is NBASE-T? A note on both Cat7 and Cat8The Cat7a specification refers to ‘Category 7 augmented’, or Class F Augmented products. This was introduced by ISO 11801 Edition 2 Amendment 2 (2010), and is defined at frequencies up to 1000 MHz. so I want to spend a little extra money to get something that will give me the very best signal possible on the other end of this 300 foot cable in my motorhome and sturdy
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