Extend fiber to the premises with OBI-free RFoG

CommScope OBI-free RFoG (Radio Frequency over Glass) solutions extend fiber reach in HFC networks all the way to the home or business while retaining the existing HFC headend and customer premises equipment. By eliminating the issue of optical beat interference (OBI), they deliver the full potential of DOCSIS 3.0 and provide the infrastructure for future transition to all-fiber, 10G PON networks.

RFoG and its advantages

RFoG (Radio Frequency over Glass) is a fiber-deep network design in which the coaxial portion of an HFC (hybrid fiber coaxial) network is replaced by a PON (passive optical network) architecture. Fiber to the home/premises (FTTH, FTTP) makes economic sense for new build, multi-dwelling units (MDU), businesses and high-use consumers.

RFoG eliminates the need for HFC nodes, RF amplifiers, and taps and passives in the network, while utilizing the existing cable headend and subscriber equipment (modems, gateways and set-tops) and back-office support systems.

An RFoG network is capable of seamlessly delivering functionality and services to subscribers in a manner that is comparable to current HFC systems.
A CommScope RFoG network provides distinct performance advantages over current HFC networks, including:

  • Provides proven support for DOCSIS 3.0 services
  • Is a more economical choice for MDU and rural deployments
  • Is comparable to HFC performance in greenfield suburban residential deployments
  • Eliminates the RF noise and ingress inherent in coaxial deployments, to expand upstream and downstream bandwidth and significantly extend network reach
  • Lowers energy costs—a greener alternative to coaxial delivery, with the added benefit of less network downtime due to power outages
  • Significantly lowers operating and maintenance costs by eliminating the need for HFC nodes and RF amplifiers
  • Is immune from environmental factors—such as temperature, galvanic corrosion, and humidity—that can cause coaxial cabling to degrade physically over time
  • Gives multiple options to eliminate optical beat interference (OBI) in the network
  • Can efficiently bridge between HFC and FTTx architectures—providing the infrastructure needed to transition to all-fiber, high-bandwidth 10G PON networks


Additional resources

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  • The Yin and The Yang of a Move to All Fiber: Transforming HFC to an All Fiber Network While Leveraging the Deployed HFC Assets

    This paper provides critical insights into the innovations that enable OBI Free RFoG transmission. He will discuss the intrinsic capabilities of Hybrid PON (HPON) technology, explain how this technology works with existing HFC analog and QAM video and D3.0 and D3.1 signals while also being completely transparent to the myriad of traditional PON standards such as the 10G EPON, 1G EPON, GPON, and XGPON1.
  • Beat It! Handling OBI in RFoG Systems

    The RF over Glass (RFoG) technology offers Hybrid Fiber Coaxial (HFC) networks with high capacity potential and extends their life deep into the 2020 decade. One of key challenges that are commonly found in RFoG systems is Optical Beat Interference (OBI). This paper is focused on analyzing the RFoG OBI phenomenon and its effect on network performance.
  • HFC Transformation to FTTP: The Role of RFoG, PON, and Hybrid Solutions

    Description: How long will HFC last? What strategies can be deployed to help extend the life of HFC through this transition period? The authors provide insight into the network capacity requirements over the next 10-20 years and what must happen for a smooth transition. Topics include capacity planning, a DOCSIS 3.1 overview, Hybrid PON, scaling considerations, and more.