GAM Technology – Low-Cost Gigabit Broadband Connectivity

Bringing fiber technologies to existing Multi-Dwelling Units (MDUs) and Multi-Tenant Units (MTUs) can be expensive, costing up to $600 USD per tenant. Positron’s technology offers a cost-effective solution. It delivers managed non-blocking symmetrical Gigabit bandwidth internet services to subscribers over existing phone line connections or coaxial cables, covering extended distances. 

With reduced complexity and lower costs compared to older copper broadband solutions such as, Positron’s technology is the ideal choice for providing high-speed internet to brownfield MDUs and MTUs.


The ITU-T G.9960 Wave-2 standard is designed to leverage the existing telephone, UTP, CAT-3 or CAT-5/5e wiring or RG-6/RG-59 coaxial cable to deliver a Gigabit Internet connection to each subscriber without the complexity and delays associated with in-building fiber installation. is increasingly used as an access technology by operators looking to simplify their access network and backend infrastructure with an Ethernet-like technology that is highly scalable without some of the inherent complexity of DSL-related technologies. With, operators deliver advanced services such as gigabit high speed residential internet and 4K IPTV without the high capital and operational expenses associated with a fiber retrofit.

GAM over copper

Each subscriber port supports up to 1.7 Gbps of dynamically allocated bandwidth for near symmetrical Gigabit download speeds and upload speeds over the existing phone lines or coaxial cable. The Positron GAM solution is MEF CE 2.0 compliant and is ideally suited to deliver Business Ethernet services in an MDU and/or MTU deployment. leverages the coaxial infrastructure to deliver Gigabit performance over a distance of 800 meters on RG-6 cabling typically used inside MDUs and homes. When using a standard coaxial splitter, it is possible to serve up to 16 subscribers per port. supports frequency notching if it needs to share the coaxial wiring with legacy (analog) RF TV signals for a smooth migration to IPTV over time while delivering maximum internet speeds at a fraction of DOCSIS 3.x

GAM over coax

About the Positron Access Multiplexer (GAM)

The Positron GAM leverages a non-blocking CE 2.0 Carrier Ethernet Core 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 multiple 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.

Experience the stability of high-speed Gigabit Internet Services and enjoy reduced support calls and less customer churn. The GAM software seamlessly integrates with end-point devices, also known as to Ethernet bridges, enhancing management capabilities. By simplifying complex functions of the Residential Gateway, the GAM streamlines operations and provides a hassle-free internet experience for both providers and subscribers. Unlike costly fiber retrofits or satellite internet options, GAM technology offers the double benefit of simplified operations and reduced costs.

Unlock the Full Potential of your Network

The GAM hardware enforced per-subscriber bandwidth profiles, maintaining a fair and balanced use of the backhaul link. From IPTV and streaming to telephony, value-added services receive consistent performance. Seamless integration with operator fiber services and existing OSS and BSS functions is effortless, thanks to GAM’s extensive VLAN support, including Q-in-Q. With Service OAM capabilities, operators gain real-time insights into service quality without added cost or complexity.
With hardware-assisted synchronization to improve the efficiency of Vectoring, the GAM optimizes the bandwidth for each subscriber based on the real-time condition.

The GAM Family

The GAM is available in form factors appropriate for both indoor or outdoor installation, with models equipped with either copper or coax ports. Copper-based models can support either 1-pair per port (Single Input Single Output – SISO) or 2-pair per port (Multiple Input Multiple Out – MIMO) operation which delivers the same speeds but over farther distances. Coax-based models support operation with up to a 1:16 split of each port to serve multiple subscribers.

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Outdoor GAMs

positron gam diagram

Indoor GAMs

Deploying the GAM in an MDU

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. While operation over twisted-pair wiring is always Point-to-Point, when using a 24-port GAM it is possible to serve up to 384 subscribers when using a coaxial infrastructure in Point-to-Multipoint mode with standard coax splitters (up to 1:16 per port). The GAM terminates the links with a client device such as the Positron G1001-M or G1001-C managed end-points from Positron. Compliant Residential Gateways with built-in client support or with SFP ports are also fully supported.

MDU Diagram

Benefits of over and GPON in addressing MDU Challenges The key differentiators between, and GPON for Gigabit Internet services in an MDU are:

gam comparisons

Benefits of over and GPON in addressing MDU Challenges The key differentiators between, and GPON for Gigabit Internet services in an MDU are:

Flexible Solution for ILEC/CLEC and Cable Operators

The Positron GAM takes advantage of Positron’s SDN-ready VIRTUOSO software Domain Controller to control and manage GAM devices. VIRTUOSO presents a native management interface to the existing OSS and BSS systems of operators. VIRTUOSO can operate either as a standalone management plane server or under the control of standard-based Orchestration Platforms, such as OpenDaylight and others.

When interfacing with an ILEC or CLEC, the VIRTUOSO Domain Controller instantiates Virtual CPE (vCPE) devices for each end-node handled by a GAM. This approach maintains the native CPE management (for instance TR-069 or SDN) in the context of an MDU served by one or more GAM. The Internet traffic is handled transparently via the OLT and through a standard Aggregation Switch (Layer-2 EVC) or Router (Layer-3 IPv4 / IPv6).

The same approach is leveraged when interfacing with a Cable MSO with native support for the CableLabs DOCSIS Provisioning over EPON (DPoE) specification. The Positron GAM directly supports OLT/DPoE Server implementation that uses the IEEE 802.3 Service OAM standard defined in the DPoE specification. The VIRTUOSO platform is used when interfacing to a DPoE Server implementation that uses SDN on its southbound interface.

positron coax diagram

Subscriber Self-Installation and Zero-Touch Provisioning

When deployed with the optional GAM Captive Portal, the Positron GAM family facilitates subscriber’s Self Installation with Zero-Touch Provisioning and Automated Activation. Automatically adding new subscribers has never been easier. The GAM Captive Portal facilitates the use of Self-Registration (walled-garden) Portals to guide new subscribers during the registration and activation process. The GAM Captive Portal facilitates seamless wireless internet roaming across the MDU common areas covered with Wi-Fi.

Part Number Description
GAM-12-M 12-port Access Multiplexer (GAM) for use over Twisted Pair wiring for 1 pair (SISO) or 2 pairs (MIMO) per RJ45 connector
GAM-12-C 12-port Access Multiplexer (GAM) for use over Coaxial cable (F-Type connector)
GAM-24-M 24-port Access Multiplexer (GAM) for use over Twisted Pair wiring for 1 pair (SISO) or 2 pairs (MIMO) per RJ45 connector
GAM-24-C 24-port Access Multiplexer (GAM) for use over Coaxial cable (F-Type connector)

Managed Ethernet Bridge Devices

Part Number Description
G1001-M Wave-2 to Ethernet Bridge over Twisted Pair
Multiple Input Multiple Output (MIMO) mode port (RJ45 port)
One (1) 10/100/1000BaseT RJ45 ports
G1001-MP Wave-2 to Ethernet Bridge over Twisted Pair.
Multiple Input Multiple Output (MIMO) mode. port (RJ45 port)
Telephone port (via built-in POTS splitter)
One (1) 10/100/1000BaseT RJ45 ports
G1001-C Wave-2 to Ethernet Bridge over Coax port (F-type male connector) CATV port (F-type male connector)
One (1) 10/100/1000BaseT RJ45 ports
G1001-C 24-port Access Multiplexer (GAM) for use over Coaxial cable (F-Type connector)

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    Extending Gigabit Fiber services to Every Door without installing fiber to the door

    Positron’s Access Multiplexer (GAM) can extend your fiber services to every door of an MDU/MTU over the existing telephone pairs or coaxial cable to deliver Gigabit broadband. The Positron GAM delivers symmetrical Gigabit broadband without the need to install fiber to every door.

    Positron Access Receives Highly Commended Honor for 2021 Global Telecoms Awards

    The Positron Access Multiplexer (GAM) redefines how fiber broadband services are extended over the in-building telephone or coax wiring to deliver Gigabit experience to every door.

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