Positron GAM for Coax

The GAM is designed to optimize coverage in an MDU / MTU over the existing wiring infrastructure to avoid the high cost of installing new fiber inside these buildings. When using a GAM-24-C, it is possible to serve up to 384 G.hn subscribers over a coaxial infrastructure. This is achieved since G.hn natively operates in point-to-multipoint mode with standard coax splitters (up to 1:16 per port). The GAM terminates the links with a G.hn client device such as the Positron G1000-M or G1000-C managed end-points from Positron. Compliant Residential Gateways with built-in G.hn client support or with SFP ports are also fully supported.

GAM-12-C and GAM-24-C


The Positron GAM-12-C and GAM-24-C for Coax can deliver Gigabit services to 2600 feet (800 meters) on RG-6 and to 1000 feet (300 meters) on RG-59! 


The ITU-T G.9960 G.hn Wave-2 standard is designed to leverage the existing RG-6/RG-59 coaxial cable to deliver a Gigabit Internet service to each subscriber without the complexity and delays associated with in-building fiber installation. G.hn is increasingly used as an Access Technology by Operators looking to simplify their access network and their backend infrastructure with an Ethernet-like technology that is highly scalable without some of the inherent complexity of DSL-related technologies.

With G.hn, Operators deliver advanced services such as Gigabit High Speed Residential Internet and 4K IPTV without the high capital cost of a fiber retrofit. Each G.hn subscriber port supports up to 1.7 Gbps of dynamically allocated bandwidth for near symmetrical Gigabit services over the existing coaxial cable. The Positron GAM solution is MEF CE 2.0 compliant and is ideally suited to deliver Business Ethernet services in MDU and/or MTU deployments.

coax chart

When using a standard coaxial splitter, it is possible to serve up to 16 subscribers per G.hn port. G.hn uses RF spectrum below 240 MHz, allowing for seamless sharing of the coaxial cabling with satellite services such as Direct TV™ or DISH™ coupled with popular Single Wire Modular (SWM) satellite TV distribution solutions.


 

Positron GAM Performance over Coax

gam mimo

G.hn leverages the coaxial infrastructure to deliver Gigabit performance over a distance of 2600 feet (800 meters) on RG-6 cabling typically used inside MDUs and homes.

The Positron GAM has a non-blocking CE 2.0 Carrier Ethernet Core ASIC to reliably deliver managed Gigabit services. The GAM is a Fiber to the Distribution Point (FTTDp) solution that is typically installed inside a wiring closet. Each GAM comes with two (2) 10 Gigabit SFP+ interfaces to support any type of fiber or PON standards (using an ONT as required). These SFP+ ports are also used to support additional GAM devices in medium to large MDUs and share the fiber backhaul link. Gigabit solutions delivered over Fixed Wireless Access (FWA) are also supported by connecting the 1-10Gbps Ethernet feed into an SFP+ port of the GAM.

G.hn Delivers Superior Bandwidth

G.hn consistently delivers superior bandwidth over coaxial cable. G.hn dynamically adjusts the allocation of the bandwidth between the downstream and upstream direction to reflect the real-time traffic conditions for optimal and near-symmetrical performance under all conditions.

The Positron GAM delivers higher-speed and stable Gigabit Internet Services at a lower cost than DOCSIS. The GAM software extends its management capabilities to the G.hn end-point (aka G.hn to Ethernet Bridge) devices (such as the Positron G1000). The GAM hardware enforces per-subscriber bandwidth profiles and guarantees a fair and balanced use of the backhaul link at all times for value-added services such as IPTV, streaming and telephony. Its extensive support for VLAN (including Q-in-Q) complies with the Broadband Forum TR-101 specification allowing for seamless integration with the operator fiber services and the OSS and BSS functions already in place. The service OAM capabilities of the GAM provide real-time information to the operator about the overall grade of services without any additional cost or complexity.

G.hn is used by large Operators in multiple markets with a strong base in South East Asia where it provides Gigabit services into MDU / MTU of all sizes as well as for residential neighborhoods. These Operators leverage the robustness of G.hn and its predictable bandwidth to scale to large deployments that complement their investment in their Passive Optical Network (PON) infrastructure.

As is the case with other ITU DSL and PON standards, G.hn offers extensive management and troubleshooting features and capabilities to simplify its deployment, activation and support. These management capabilities cover all operational aspects, from dealing with wiring issues to service-aware QoS and bandwidth management. The G.hn ecosystem is very solid and includes verified interoperability between the three (3) main chipset vendors based on extensive testing by the University of New Hampshire (UNH) lab.

The Positron GAM is available in 24 and 12 port configurations for either coaxial cable or twisted pairs with support for Single Input Single Output (SISO) mode, (1 pair per port) and Multiple Input Multiple Output (MIMO) mode (2 pairs per port). Using MIMO instead of DSL pair bonding means that there is no need to allocate two (2) ports to serve a single subscriber, lowering costs and avoiding the complexity of pair bonding.


 

GAM Documents

GAM Solution Brief

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GAM Datasheet

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G1000 Datasheet

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Article on Positron GAM in Broadband Communities Magazine
October 2019

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