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CTO INDUSTRY INSIGHTS

Something Old, Something New


Something Old, Something New

2017 will be remembered as the year that G.fast technology proved itself in the field. With real-world deployments offering previously impossible service rates, this technology has cemented its future in the era of ultrafast broadband delivery. With second- generation G.fast chipsets comfortably delivering on the needs of Gigabit societies, and innovations like Dynamic Timing Allocation (DTA) offering service symmetry, this access technology can outperform both cable broadband, and first- generation PON technologies.

While the focus for G.fast has always been around speed, now that the technology is sufficiently proven, the conversation, while still about speed, has shifted to speed of deployment.

For many network operators, much of their attraction towards maintaining service delivery over their copper infrastructures stems from the challenges with extending fiber deeper into their networks. This challenge holds true for access fibers, but for many it also applies to backhaul fibers, which are needed for short-loop G.fast DPUs, and in the future for small-cell densification.

Leveraging ADTRAN's heritage as one of the industry's leaders in bonded-copper technologies, ADTRAN has applied this experience to attack the time to market challenge facing G.fast in a completely new way.

Targeting G.fast DPU deployments in building basements, ADTRAN's Gigabit-to-the-Basement solution brings high-density copper bonding techniques to all of the latest copper access technologies. With the potential to bond up to eight copper pairs of G.fast, Supervectoring profile 35b, or Vectored VDSL2, ADTRAN's second- generation G.fast DPUs have a variant that sees the current in built fiber up-link complemented with an eight pair bonded cooper up-link. These fiber-ready DPUs can realize Gigabit throughput on the high-density bonded copper up-link when connected to existing Fiber-to-the-Cabinet (FTTC) assets. For many consumer applications, a Gigabit of backhaul will be sufficient to support initial G.fast-based services, while the fiber-ready status of the G.fast DPU ensures that the infrastructure is ready to capitalize on fiber densification when it occurs.

By leveraging ADTRAN's unique experience in copper-bonding technologies, network operators can benefit from two to five times reduction in the time required to deploy G.fast when compared with that required to deploy a similar footprint that utilizes fiber for all backhaul links. This unique combination of old and new technologies from ADTRAN opens up more options to defend against the future threats being posed by DOCSIS 3.1 and 5G access, enabling operators to secure first mover advantage in the battle for the connections that will underpin the Gigabit Society.