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GG45

GG45, also known as GigaGate 45, is a high-performance modular connector developed for Category 7, 7A, and 8 twisted-pair copper cabling systems in Ethernet networks, featuring 12 contacts that enable backward compatibility with the standard 8-contact RJ45 interface while supporting frequencies up to 2000 MHz for applications beyond 10 Gigabit Ethernet.^[1]^[2] Originally introduced by the French cabling manufacturer Nexans in the early 2000s, GG45 was designed to address the limitations of the RJ45 connector in achieving the stringent crosstalk and shielding requirements of Category 7 cabling, as specified in the ISO/IEC 11801 standard ratified in 2002.^[2]^[3] The connector adheres to the IEC 60603-7-71 international standard, which defines its electrical and mechanical characteristics for Category 7A/Class FA performance, including support for 25GBASE-T and 40GBASE-T transmission over distances up to 30 meters when paired with appropriate cabling.^[1] Key features of the GG45 include full 360-degree shielding via a die-cast metal housing and rear cover to minimize electromagnetic interference, a "two-in-one" design with eight contacts dedicated to high-speed GG-mode transmission and four additional contacts for RJ45 compatibility, and integration with Power over Ethernet (PoE) standards such as IEEE 802.3af/at/bt.^[1]^[4] It is typically implemented as a snap-in module for installation in patch panels, outlets, and wall plates, using specialized termination tools for solid or stranded conductors in shielded cables.^[1] Despite its technical advantages, adoption of GG45 has been limited outside specialized data center and industrial environments due to the widespread entrenchment of RJ45 infrastructure and the emergence of Category 6A as a more practical alternative for 10G Ethernet.^[3] Manufacturers like Nexans and Datwyler offer GG45 components with extended warranties—up to 25 years for compliant systems—ensuring long-term reliability in high-bandwidth deployments.^[1]^[4]

Overview

Definition and Design

The GG45, also known as GigaGate 45, is a 12-contact connector specifically developed for Category 7 and higher cabling systems, featuring an augmented RJ45 form factor that incorporates additional shielding and contacts to support advanced high-frequency data transmission.^[5] This design allows it to function as a "2-in-1" interface, maintaining compatibility with legacy systems while enabling enhanced performance for modern networking demands. The physical design of the GG45 includes a rectangular housing equipped with a snap-in mechanism for secure panel or outlet mounting, ensuring backward compatibility with the standard RJ45 interface via eight shared contacts, supplemented by four extra contacts positioned to achieve Category 7/7A performance levels up to 600-1000 MHz, with later variants supporting up to 2000 MHz for Category 8.^[6]^[1] Its screened construction provides 360° electromagnetic compatibility (EMC) protection, effectively minimizing crosstalk and electromagnetic interference in high-speed environments.^[7] Additionally, the connector employs insulation displacement contact (IDC) termination using a specialized tool, supported by an integrated wire organizer for precise alignment.^[7] Visually, the GG45 measures approximately 19.5 mm in height, 17 mm in width, and 41.4 mm in depth, forming a compact yet robust module typically housed in zinc die-cast material with nickel plating for durability.^[7] The contacts are gold-plated to ensure corrosion resistance and reliable signal integrity over repeated mating cycles.^[8] Compared to the standard RJ45, the GG45 supports significantly higher bandwidth capabilities, making it suitable for applications requiring sustained data rates beyond 10 Gbps.^[6]

Development History

The GG45 connector was developed by Nexans in the early 2000s as part of efforts to enable higher-frequency cabling systems for emerging 10GBASE-T Ethernet applications, which demanded performance beyond the 250 MHz limit of traditional Category 6 infrastructure.^[9] Nexans, tracing its roots to Alcatel through earlier mergers in the telecommunications sector, invented the GG45 to mitigate alien crosstalk issues inherent in RJ45 connectors at frequencies exceeding 600 MHz, positioning it as a forward-looking solution for Category 7 cabling.^[10] This development occurred in parallel with the competing ARJ45 connector, introduced by CommScope, as alternative augmented interfaces for enhanced data transmission.^[3] The connector achieved initial standardization in 2002 under IEC 60603-7-7, defining its specifications for shielded, 8-way connectors suitable for data communications up to 600 MHz.^[9] In 2002, GG45 was selected as the reference interface for Category 7 (Class F) channels within the ISO/IEC 11801 standard, which ratified Category 7 cabling to support stricter crosstalk and noise requirements for 10 Gigabit Ethernet over 100 meters of copper.^[3] This alignment marked a key milestone, with early adoption centered in European markets where Nexans held strong manufacturing and distribution presence, facilitating integration into structured cabling systems compliant with international norms.^[9] By 2005, Nexans incorporated GG45 into its LANmark-7 product line, expanding availability through snap-in connectors and accessories optimized for Category 7 installations, which further promoted its use in broadcast and high-speed LAN environments.^[6] Although ISO/IEC 11801 provided global recognition, GG45 saw limited uptake in North American standards; the TIA/EIA framework did not formally adopt Category 7 or its augmented connectors like GG45, favoring RJ45-based enhancements in later revisions such as Category 6A.^[3] The design's "2-in-1" configuration, incorporating 12 contacts for both legacy RJ45 compatibility and full GG45 operation, was a deliberate feature to ease migration during these standardization phases.

Technical Specifications

Pin Layout and Contacts

The GG45 connector employs a 12-pin configuration, featuring eight standard RJ45-compatible pins (1 through 8) that support twisted pairs 1-4 for 1000BASE-T Ethernet operation at up to 250 MHz, ensuring backward compatibility with existing Category 6 infrastructure. The additional four pins (9 through 12), positioned in the connector's corners, facilitate differential signaling for Category 7 performance, enabling frequencies up to 600 MHz by optimizing pair separation to minimize crosstalk.^[5]^[4] In full Category 7 mode, pins 9-12 are engaged via a spacer element within the connector assembly, which routes the fourth twisted pair through these contacts while maintaining isolation from the primary eight pins; this setup also accommodates Power over Ethernet Plus (PoE+) delivery up to 30 W across the standard pins 1-8 without compromising signal integrity. The pin assignments align with ISO/IEC 11801 standards for Class F cabling, where pins 1-8 follow T568A/B wiring schemes for legacy support, and pins 9-12 handle the high-frequency extension pair.^[1]^[11] Contacts in the GG45 are constructed from phosphor bronze, gold-plated to a thickness of 50 microinches for enhanced conductivity, durability, and resistance to oxidation, allowing up to 1,000 mating cycles. Termination occurs via Insulation Displacement Contact (IDC) technology, compatible with solid or stranded conductors in 22-26 AWG sizes, enabling tool-less or punch-down installation while preserving wire integrity.^[12]^[5] Electrically, the GG45 maintains characteristic impedance at 100 ohms ±15% across the operational bandwidth, critical for balanced signaling in twisted-pair applications. Insertion loss and return loss meet the requirements of ISO/IEC 11801 for Category 7 performance, minimizing signal attenuation and reflections in high-speed links.^[1]^[6]

Performance Characteristics

The GG45 connector is certified for frequencies up to 600 MHz under Category 7 (Class F) specifications and extends to 1000 MHz for Category 7A (Class Fa) applications, with support for up to 2000 MHz in Category 8 configurations, enabling Ethernet speeds of 10 Gbps and beyond while maintaining low signal attenuation over extended distances.^[13]^[1] This bandwidth capability arises from its 12-contact design, which separates transmission pairs to minimize interference.^[6] Key electrical performance metrics include alien crosstalk (AXT) attenuation exceeding 35 dB at 500 MHz and power sum near-end crosstalk (PSNEXT) greater than 40 dB across operational frequencies, ensuring robust full-duplex transmission with negligible signal degradation even in dense cabling environments.^[13] The connector's fully shielded construction provides excellent immunity to external noise, contributing to these high margins.^[1] GG45 connectors handle power delivery effectively, supporting Power over Ethernet Plus (PoE+) up to 30 W per the IEEE 802.3at standard, and are compatible with PoE++ (up to 100 W under IEEE 802.3bt) thanks to their robust gold-plated contacts and 360-degree shielding for heat dissipation.^[13]^[14] Performance is verified through compliance with ISO/IEC 11801 Class F and Fa standards, including comprehensive channel testing that confirms reliability over permanent links up to 100 m when paired with appropriate Category 7/7A cables.^[13] These tests encompass insertion loss, return loss, and crosstalk parameters, ensuring the connector meets or exceeds requirements for high-speed data integrity.^[15]

Compatibility and Usage

Integration with RJ45

GG45 connectors achieve backward compatibility with RJ45 infrastructure through a dual-mode design that utilizes 12 contacts, where only 8 are engaged in RJ45 mode to match standard Ethernet applications. This is facilitated by an incorporated switch mechanism, often activated by a spacer on the GG45 plug, which isolates the additional four contacts used for higher-frequency GG45 transmission and limits operation to the 100–250 MHz bandwidth typical of Category 5e and 6 performance.^[6]^[16] In this configuration, GG45 jacks seamlessly accept standard RJ45 plugs without requiring modifications to existing devices, enabling fallback support for legacy networks such as 10Base-T, Gigabit Ethernet, and 10GBase-T over shorter distances.^[1] GG45 modules are designed to integrate directly into standard RJ45 faceplates and patch panels via optional adapter clips, allowing installation in conventional keystone formats without altering building infrastructure. Conversion plugs and adapters further enable RJ45-terminated devices to connect to GG45 ports, preserving compatibility in mixed environments while maintaining the physical footprint of traditional setups.^[16]^[6] This modular approach supports straightforward upgrades, as GG45 components can be snapped into existing enclosures compliant with ISO/IEC 11801 standards.^[1] Interoperability has been verified through testing in mixed cabling scenarios, confirming reliable 1 Gbps and 10 Gbps links when combining GG45 jacks with RJ45 plugs and Category 6 cabling. These tests demonstrate minimal insertion loss at operating frequencies, ensuring low signal degradation and compliance with Category 6/Class E requirements for return loss, NEXT, and FEXT parameters.^[1]^[16] The switch mechanism endures over 1,500 mating cycles with RJ45 plugs without performance degradation or wear.^[16] However, achieving full Category 7 benefits, such as 600 MHz operation, necessitates end-to-end GG45 termination on both ends of the link; partial compatibility with RJ45 components reduces the effective bandwidth to Category 6 levels and may introduce limitations in higher-speed applications beyond 10 Gbps.^[6]^[16] In mixed setups, overall channel performance is constrained by the lowest-rated component, potentially capping frequencies at 250–500 MHz depending on cable quality.^[16]

Supported Cabling Standards

The GG45 connector is primarily designed to support Category 7 (Class F) screened twisted-pair cabling, which operates up to 600 MHz, and Category 7A (Class FA) cabling, extending performance to 1000 MHz.^[1] These standards utilize fully shielded configurations such as S/FTP (shielded/foiled twisted pair) or F/FTP (foiled/foiled twisted pair) to minimize electromagnetic interference and ensure high-frequency signal integrity.^[17] The connector's 12-contact design facilitates reliable termination of these cable types, providing backward compatibility with lower categories while optimizing for advanced shielding requirements.^[2] GG45 aligns with key international standards, including ISO/IEC 11801 for permanent link and channel performance specifications in Class F and Class FA environments.^[6] Supported cables consist of four twisted pairs constructed from 23-24 AWG solid or stranded copper conductors, with individual pair foil shielding and an overall braid or foil for comprehensive protection, maintaining a maximum DC resistance of 10 ohms per 100 meters to preserve power delivery and signal quality.^[18] For future-proofing, GG45 offers partial compatibility with emerging Category 8 (Class I/II) cabling at up to 2000 MHz, particularly in short-run applications such as data center interconnects up to 30 meters, though full standardization and widespread adoption for GG45 with Cat 8 remain limited.^[1] This capability stems from the connector's extended frequency handling in GG-mode, allowing it to accommodate higher-bandwidth needs beyond traditional 10GBASE-T deployments.^[1]

Applications and Advantages

High-Speed Networking

The GG45 connector plays a pivotal role in high-speed networking environments, particularly in data centers and enterprise LANs, where it supports 10 Gbps Ethernet as defined by IEEE 802.3an standards. Its design accommodates the bandwidth demands of server-to-server communications and large-scale data processing, leveraging Category 7 cabling to achieve frequencies up to 600 MHz.^[5] The connector's fully shielded construction provides 360-degree electromagnetic compatibility (EMC) protection, which minimizes signal degradation and crosstalk in dense deployments. Such performance enhancements make GG45 suitable for environments requiring consistent throughput without frequent retransmissions.^[5]^[6] Deployments of GG45 have occurred in European telecommunications infrastructures, where it has facilitated upgrades to support high-bandwidth services in line with ISO/IEC 11801 Class F standards. These implementations highlight GG45's adaptability in scaling network capacity for telecom providers.^[3]

Installation and Maintenance

The termination process for GG45 connectors involves a tool-less snap-in design that utilizes insulation displacement contacts (IDC) to secure wires without requiring traditional punch-down tools. Technicians prepare the cable by stripping the outer jacket and foil shielding, then use a wire organizer to position the twisted pairs according to T568A or T568B color codes, ensuring the untwist length per pair remains under 0.5 inches (13 mm) to preserve crosstalk performance. Strain relief clips are then engaged to retain the cable jacket, providing mechanical support and preventing pull-out during handling.^[6]^[19] Required tools for termination are minimal, typically consisting of a precision cable stripper for jacket and foil removal, along with the optional Nexans Easy Termination Tool, which automates foil separation and wire alignment for shielded cables to ensure consistent results. For plug variants, a compatible crimping tool may be used, though the snap-in jack format emphasizes field-installable efficiency without specialized equipment. The GG45's dual-mode compatibility with RJ45 allows for straightforward upgrades in existing infrastructure.^[5]^[20] Maintenance of GG45 connectors focuses on preserving the integrity of the gold-plated contacts and overall assembly. Periodic visual inspections should check for signs of corrosion, dust accumulation, or physical damage to the shielding, with cleaning performed using 90% or higher isopropyl alcohol on a lint-free swab, avoiding abrasive materials that could scratch the contacts.^[21] A frequent issue in GG45 deployments arises from mismatched shielding grounding, particularly in mixed environments, which can induce ground loops resulting in audible hum or electromagnetic interference. To mitigate this, all shielded components must share a common earthing point, and installers should avoid combining shielded GG45 cabling with unshielded types in the same segment to prevent noise injection; proper bonding of the drain wire to the connector housing during termination is essential.^[22]^[23]

Comparisons

With RJ45 Connectors

The GG45 connector features 12 contacts compared to the standard RJ45's 8 contacts, with the additional four contacts positioned in the corners to enable improved pair separation and enhanced crosstalk isolation, particularly beneficial for high-frequency applications.^[2] This design upgrade minimizes electromagnetic interference between twisted pairs, supporting more reliable signal transmission in dense cabling environments.^[1] In terms of frequency support, the GG45 can handle up to 2000 MHz for Category 7A/8 applications, quadrupling the 500 MHz maximum of RJ45 connectors used in Cat6A systems and offering greater bandwidth capacity for future high-speed Ethernet standards.^[1]^[24] This extended frequency range positions GG45 as a more future-proof option for networks requiring sustained performance beyond 10 Gbps over longer distances. GG45 connectors are typically 20-50% more expensive than equivalent RJ45 models due to their advanced shielding and additional contacts, with individual units often priced around $10-15 compared to under $1 for basic RJ45 plugs.^[25]^[26] Availability of GG45 is more limited outside Europe, where it sees greater adoption in professional installations, whereas RJ45 remains universally accessible but constrained for emerging high-category needs.^[27] The GG45 provides a seamless upgrade path from RJ45 infrastructure via its dual-mode pin configuration, as its 8 central contacts maintain full backward compatibility, allowing direct insertion into existing RJ45 ports without rewiring.^[2] However, achieving maximum GG45 performance requires an end-to-end chain of compatible components to leverage the full benefits of reduced crosstalk and higher frequencies.^[1]

With ARJ45 Connectors

The GG45 and ARJ45 connectors serve a shared purpose in augmenting structured cabling systems to support higher frequencies and data rates beyond traditional RJ45 limitations. Developed as proprietary alternatives for Category 7 and 7a applications, they differ significantly in design philosophy to address compatibility and performance needs in high-speed networks. The GG45 connector employs a "2-in-1" snap-in architecture, integrating a complete Category 6 RJ45 interface alongside a dedicated Category 7 interface via additional contacts, using pin configuration for mode selection (8 central pins for RJ45 compatibility, all 12 for GG mode).^[5] In comparison, the ARJ45 features a universal 12-contact layout engineered for direct Category 7a operation, also relying on its augmented pin configuration (8 for RJ45, 12 for ARJ) for compatibility and high-frequency transmission.^[28] Standardization efforts highlight regional divergences: the GG45 is aligned with ISO/IEC 11801 Class F/FA and higher specifications (up to 2000 MHz), gaining prominence in European markets through its alignment with international cabling norms and IEC 60603-7-71.^[6] Conversely, the ARJ45, developed by Stewart Connector, meets IEC 60603-7-71 for Category 7A performance up to 1000 MHz (and up to 2000 MHz for Category 8), with mechanical interface per IEC 61076-3-110, and has found greater traction in North America, where it complements TIA-oriented ecosystems despite the absence of formal TIA adoption for Category 7.^[29] Both connectors deliver performance parity for Category 7/7a cabling, supporting frequencies up to 2000 MHz to facilitate 10 Gigabit Ethernet and applications requiring low crosstalk.^[30] The GG45's dual-mode design provides superior ease of integration with existing RJ45 equipment, minimizing upgrade disruptions in mixed environments.^[1] Meanwhile, the ARJ45's modular plug-and-jack system offers advantages in flexible, scalable installations, such as PCB-mounted configurations for enterprise and data center use.^[31] Market adoption reflects these distinctions, with GG45 more prevalent in European high-end deployments due to Nexans' regional influence, while ARJ45 sees broader use in North American projects favoring its modular versatility.^[32] Overall usage remains niche compared to RJ45, but trends indicate convergence toward the TERA connector for ISO Category 8 systems, as it addresses compatibility concerns in emerging 40 Gigabit Ethernet infrastructures.^[33]

References

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LANmark-7A/-8 GG45 Connector - Nexans
The LANmark GG45 connector features 12 contacts: 8 contacts for the 2000 MHz transmission (GG-mode) and 4 additional contacts to ensure RJ45 compatibility (RJ ...Missing: specification | Show results with:specification
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Ethernet Cables Explained | Eaton
GG45 (GigaGate 45) or ARJ45 (Augmented RJ45) is a connector originally developed by French cable company Nexans for use with Cat7 cable. GG45 connectors ...<|control11|><|separator|>
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Dec 5, 2018 · Category 7 cabling was ratified in 2002 in the ISO/IEC 11801 standard. Designed to meet strict Class F channel specifications for crosstalk and interference.
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The PS-GG45 7A is a shielded, two-in-one connector, compatible with RJ45 and up to 1000 MHz, with two transmission modes, and supports PoE+.
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LANmark-7 GG45 is a standardised High Speed '2 in 1' Snap-In Connector, which contains a full Cat 6 (RJ45) Interface as well as a full Cat 7 Interface.Missing: specifications manufacturer
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LANmark-7 GG45 is a standardised High Speed '2 in 1' Snap-In Connector, which contains a full Cat 6 (RJ45) Interface as well as a full Cat 7 Interface, ...
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The LANmark GG45 connector fits all structural hardware designed for LANmark Snap-In connectors and can be used in all positions of a 4 connector Channel (Patch ...
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Rating 5.0 (195) · Free 14-day returnsRequire 50μ" gold plating on contacts for corrosion resistance in high-humidity environments. Compliance mandates include RoHS 3 and REACH SVHC documentation, ...
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Câbles de Lyon becomes a division of CGE. 1969: CGE acquires Alcatel, the two companies merge to form CIT-Alcatel, developing the business of Câbles de Lyon.
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GG45 (GigaGate 45) and ARJ45 (Augmented RJ45) are two related connectors for Category 7, Category 7A, and Category 8 telecommunication cabling.
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What kind of connectors do I need for Cat7A or Cat7 cables?
Another solution is the GG45 connector, it is compatible with the normal 8p8c RJ45 plug. Moreover, GG45 connector has four additional contacts that support new ...
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LANmark-7A GG45 is a screened RJ45-compatible cable jack specified up to. 1000MHz. It is designed specifically to support the high frequencies required for.
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Free delivery 30-day returnsThis cable, due to its technical characteristics, is recommended for PoE++ applications (Type 3 and Type 4). Ref. 219202. Codes.
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In conjunction with the GG45 plug, transmission up to. 1,000 MHz is possible on the outer 4 contacts with a suitable cable. This transmission bandwidth ensures.Missing: range 7A alien crosstalk PSNEXT PoE ++ 11801
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When combined with GG45 or TERA connectors, Cat 7 cable is rated for transmission frequencies of up to 600 MHz. [edit] Category 7a. Category 7a (or Augmented ...
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This Category 7 cable is fully shielded, meets 600 MHz performance, has a 7.1mm OD, 23 AWG solid copper, 75°C rating, and 100-600 MHz impedance of 100 ± 22%.
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Jun 29, 2013 · The answer as above is yes compatibility this is something you may also ask Nexans about it, to confirm to you from their experience with their clients!Cisco Switch to Cisco Switch using QSFP-40/100-SRBD to 40G-SRBDNexus switch network design to handle 40Gbps data trafficMore results from community.cisco.comMissing: 40Gbps | Show results with:40Gbps
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This completely new-designed assembly tool for LANmark-7 GG45 automates the removal of the pair of foils and positioning of the wires in the cable holder when ...
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May 7, 2025 · For minor corrosion, it's recommended to dampen a microfiber cloth or cotton swab with isopropyl alcohol (90% or higher) or an electronic contact cleaner.Missing: GG45 ISO standards
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LANmark GG45 Snap-In Connector Cat 7A/8. £9.95Price. Quantity* ... 70M STERN With out BULB BLACK USA. Price£498.16 · Lamp holder GX5.3/GX6.35 812 ...
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