New ITU Standards Double G.fast Access Speeds to 2 Gbps

  • ITU
GENEVA — ITU, the United Nations agency for information and communication technologies standards, has doubled the access speeds achievable with the ITU G.fast broadband standard. G.fast is now capable of enabling data rates up to 2 Gbps over traditional telephone lines, providing operators with a valuable complement to FTTH technologies in scenarios where G.fast proves the more cost-efficient strategy. These standards have achieved first-stage approval and are expected to see final approval before the close of 2016.

G.fast provides fiber-like speeds matched with the customer self-installation of DSL, resulting in cost-savings for service providers and improved customer experience.

The third amendment of ITU-T G.9701 doubles the aggregate net data rate achievable with G.fast, increasing its capacity to 2 Gbps using spectrum up to 212 MHz. The update to the standard maintains spectral compatibility with VDSL2. The coexistence of G.fast and VDSL2 offers service providers the agility required to switch customers between G.fast and VDSL2 as business operations demand.

Coexistence of G.fast and Satellite Signals in Coaxial Cable Infrastructure
The amendment extends G.fast’s application to coaxial cable, enabling the coexistence of G.fast and satellite signals in coaxial cable infrastructure. The amendment also specifies a mechanism for dynamic time assessment, functionality that enables upstream or downstream transmission to exploit G.fast’s full aggregate net data rate. This functionality will improve users’ broadband experience by increasing upload or download speeds in line with the demands of the applications in use.

Revisions to ITU-T G.652 and G.657 extend and optimize the use of these optical fibers beyond their current capabilities. ITU-T G.652 was released in 1984 as the first standard for single-mode fibers, leading to these fibers becoming known as “standard single-mode fibers.” ITU-T G.652 fibers were the first to be deployed in public networks and still account for the vast majority of the fibres installed worldwide. ITU-T G.657 is a standard for single-mode fibres created in 2006 specifically for optical access networks, networks which are more demanding of fiber and fiber-optic cabling with respect to macrobending sensitivity and connectivity.








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