Networking Components | Products

28. February 2017

Old cables for new WLANs

the new standard for 2.5 and 5 Gigabit Ethernet

More and more mobile users with ever more demanding apps and applications need ever higher data rates in wireless LAN (WLAN). The standardisation bodies and the manufacturers of the WLAN access points have responded to this need and devices which operate according to the WLAN standard IEEE 802.11ac reach data rates of more than one gigabit per second. IEEE 802.11ax, which should provide far higher data rates, is already under development.

Fast access points require a high-performance connection to the wired network in order to be able to transmit the data in both directions without sacrificing performance. With cabling components of category 6A, data rates of up to ten gigabits per second are possible, far more than is needed. In many networks, however, components of Category 6 and partially even in Category 5 are installed, which are designed for data rates of up to one gigabit per second. However, re-cabling is not so simple in many areas such as lobbies, lounges and reception areas, in the corridors of hotels and companies, or in industrial workshops, so the higher data rates should be transmitted over the existing cabling.


The IEEE 802.3bz standard, adopted in September 2016, defines two new Ethernet types: 2.5GBASE-T with two and a half gigabits per second and 5GBASE-T with five. Both are based on the established 10GBASE-T, the 10 Gigabit Ethernet for copper cabling. However, because of to the reduced data rate the cabling demands are lower. For 2.5GBASE-T, class D cabling with components of currently valid category 5 is sufficient. 5GBASE-T occupies a frequency range of up to at least two hundred megahertz and therefore requires a class E cabling with category 6 components. Both are standardized for cable lengths of up to one hundred meters. Because shorter transmission distances mean lower attenuation than the long ones, it is quite possible that 5GBASE-T in many cases also works with class D cabling. To this end, professionally installed, high-quality components with corresponding system reserves are particularly helpful.

Product solutions from Telegärtner have always had practical relevance reserves and provide users around the world reliability and investment protection,


Telegärtner RJ45 modules designed for practical applications.
With integrated overbending protection, constructive optimization
for Power over Ethernet Plus and significant headroom.

Telegärtner cabling systems: Perfectly matched components for maximum performance and reliability.