GG45

GG45 and ARJ45 are two related connectors for Category 7, Category 7_A, and Category 8 telecommunication cabling. The GG45 interface and related implementations are developed and sold by Nexans S.A., while the ARJ45 interface and related implementations are developed and sold by Bel Fuse Inc. The electrical performance of each is compliant with IEC 61076-3-110, as published by the International Electrotechnical Commission. Furthermore, the ARJ45 connector meets the mechanical dimensions specified in IEC 61076-3-110.

Details

The GG45 and ARJ45 connectors operate in the frequency band between 600 MHz and 5 GHz with shielded twisted pair and twinax cables. To reduce crosstalk, two of the four pairs have been moved so that each pair occupies one corner.
GG45 is a variant of ARJ45 that allows for cables terminated with male 8P8C connectors to be plugged into GG45 ports. However, GG45 cables cannot plug into 8P8C ports as a protrusion on the socket is designed to activate a switch on the port for the alternative contact positions.
Combined with an internal system of Faraday cages, the GG45 interface therefore has plenty of headroom, plus the ability to migrate to higher speed service by upgrading to Category 7A patch cords that activate the switch in the port.
There are two main variants of GG45/ARJ45:

GG45 or ARJ45 HD is the full connector with 12 contacts, providing a Category 6 cable interface for older devices as well as the new interface.
ARJ45 HS is the version without the Cat-6–compatible contacts, for a total of 8 contacts.


 1 2 3 4 5 6 7 8 
  3′6′ |   | 4′5′ ARJ45 HS omits the Cat-6–compatible 3-6 and 4-5 pairs.
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