Fibra.City, a telecomunication and ICT company based in Milan, successfully achieved an access speed of 10Gbps on an OpenFiber FTTH fiber optic network. The technology, which made it possible to reach the remarkable goal of 33 times the maximum speed available with VDSL2 technology on copper, is that of the XGS-PON.
The XGS-PON technology allows the reuse of the existing optical network infrastructure already developed by Open Fiber for the GPON service, with only the change of the OLT in the central office and of the user ONU, exploiting the capacity of the optical fiber, symmetrically in downstream and upstream.

What is XGS-PON? In 2010, XG-PON became the first NG-PON (Next Generation-Passive Optical Network) architectures to be standardized, providing 10/2.5G asymmetric bandwidth. As bandwidth needs increased dramatically, NG-PON2 was conceived and in 2015 the ITU standardized TWDM-PON (G.989.1, -2, -3) to include both asymmetric 10/2.5G bps and symmetrical 10/10 Gbps, as well as multi-channel and tunable wavelengths. TWDM-PON has become the basis for XGS-PON, adopted in 2017, which is basically TWDM-PON minus multi-channel and tunability.

Domenico Angotti, head of Engineering Open Fiber, said: “Milan is the first city in Italy to host this experimentation on a commercial network, of which Open Fiber is a pioneer in Italy (as well as among the few Ftth operators in the world) which provides for the release of a new service on the same existing optical distribution network, that raises up to ten times the speed currently available for access, both in download and in upload”

Previously in Europe tests were carried out by the Vodafone operator with Alcatel technology in 2015, and in 2017 the telecomunication’s company Elisa in Finland completed a field trial of Nokia’s XGS-PON technology.