802.3bz Provides Congestion Relief – 2.5 Gbps & 5 Gbps Over Copper

May 3, 2018 at 8:00 AM

 

Cat5e and Cat6 cables are two of the most widely used cables in the world. Traditionally, for conventional Cat5e and Cat6 twisted-pair copper cabling, Gigabit Ethernet (1 Gbps) is the fastest standard. A wired connection of 1 Gbps is probably enough speed for one PC user, but with the surge of high-speed Wi-Fi devices being used over the last few years, Gigabit Ethernet has become increasingly congested. Thus, the IEEE has developed the 802.3bz standard to ease the pain of 1 Gbps traffic and allow speeds of up to 2.5 Gbps and 5 Gbps over Cat5e and Cat6 copper cables.

  

To escape the 1 Gbps bottleneck and increase speeds to 10 Gbps, a network cable upgrade to Cat6a or Cat7 is usually required. At an estimated $300 per cable pull, upgrading cable is a costly process and not always feasible, especially for large networks which could also encounter expensive delays and connection disruptions in the process.  Fortunately, the 802.3bz allows users to avoid expensive cable upgrades. This new 2.5G/5GBASE-T standard can provide 2.5 Gbps speeds over 100 meters of Cat5e cable and 5 Gbps speeds over 100 meters of Cat6 cable. These higher speeds are bookended by a switch on one end and either an Ethernet extender or electronic device on the opposite end.

 

The physical layer of 2.5G/5GBASE-T is similar to 10GBASE-T, but uses 200 MHz or 100 MHz spectral bandwidth instead of 400 MHz. This is beneficial because 2.5G/5GBASE-T consumes less than half the bandwidth of 10GBASE-T and doesn’t require a high-quality, mega-shielded cable. The 802.3bz standard also provides additional features such as Power over Ethernet (PoE), which is useful when rolling out Wi-Fi access points.

 

With a growing need for faster connections, 802.3bz provides a sensible way to upgrade networking capabilities without the expense of re-cabling, all while improving user experience and avoiding costly downtime.

 

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