GG-45
GG45 is a protected name for a plug and socket (also connector ) plug system of category 7 (or 7A) for LAN cabling of data communication systems (e.g. Ethernet in a Cat 7 data network). GG45 is specified for higher data rates than those of the RJ45 connector. The version of GG45 available in 2008 supports a bandwidth of 1000 MHz on the network, current systems with RJ45 connectors according to Category 6A allow a bandwidth of currently a maximum of 500 MHz.
development
The GG45 system was developed by Nexans , the company also received the property rights for the designation GG45. GG was used as the abbreviation for GigaGate , but this name could not be protected, so that the designation GG45 is protected as a brand name alone . The addition 45 is intended to clarify the downward compatibility with RJ45 . The GG45 cabling system was standardized as IEC-60603-7-7 in 2002 and then selected in ISO-11801 as the worldwide cabling standard for Category 7 / Class F cabling. The GG45 fulfills the standard requirements of the class FA-4 connector channel when using the GG45 patch cable.
Structure and usability
Today's GG45 is a 2-in-1 solution, as the GG45 socket (but not the plug) is downward compatible with RJ45. This means that conventional RJ45 plugs can be used in new GG45 environments (network sockets, patch panels). Conversely, however, it is not possible to use the GG45 plug in an RJ45 socket. In the downward compatible operating mode, however, the connector does not achieve its full performance, but only a bandwidth of 500 MHz in accordance with category 6A . The weakest link in such a chain is the Cat 6A patch cable and thus determines the overall performance.
In addition to the eight contacts of the RJ45 system, the GG45 socket has four more contacts in the upper outer corners of the RJ45 connector face. The middle 4 RJ45 contacts are only connected to an RJ45 during operation. At frequencies of up to 500 MHz on the RJ45 contacts, the lower contacts do not interfere with the signal. The additional contact pairs at the top right and left enable the higher bandwidth of 600 MHz according to Category 7 and in the new version according to Category 7 A of 1000 MHz. According to the developer, this means that 40 Gigabit / s can be transmitted over a distance of 100 m.
However, not all twelve contacts are used at the same time, as data cables only have 8 cores according to the standard. Instead, a spring mechanism separates the middle RJ45 contacts and relocates them to the chassis ground. As a result, from Cat 7 operation, only the outer contacts (1/2 and 7/8) of the RJ45 strip and the additional top 2 GG45 contact pairs are in use. Due to the greater distance that all pairs have to one another, a transmission bandwidth of up to 1000 MHz is possible. Category 7 and class F (ISO / IEC / 11801: 2002) are then supported with a large power reserve. For switching to category 7 and higher, GG45 plugs have an additional nose on the front. The plug and socket have a cross-shaped shield in the middle; this ensures that the four wire pairs are shielded from one another.
Nexans now has a cooperation with the American manufacturer Bel Stewart, the market leader for data connectors and print modules for circuit board assembly. Independent of the GG45 development by Nexans, the latter developed a category 7-capable print version under the name ARJ45 , which is fully compatible with the GG45 system. Nexans has developed its own print socket (GG45 8C), which, according to the manufacturer , should exceed category 7 A and cover a bandwidth of up to 1400 MHz. There is thus the possibility that the GG45 standard will be able to establish itself as a Category 7/7 A system in the future , as manufacturers of active components can use these print sockets to develop devices with higher transmission speeds.
Individual evidence
- ↑ Cooperation between Nexans and Bel Stewart for the development of a Cat7 socket for active components. (PDF; 46 kB) Nexans Germany, December 1, 2006, accessed on June 29, 2012 (press release).