The latest updates to the ITU G.709 series enhance the Optical Transport Network (OTN) with new capabilities including an option for stronger forward error correction (FEC) for long-reach interfaces and additional security for short-reach interfaces.
ITU G.709 standards are developed by ITU-T Study Group 15 (Transport, access and home).
A revision to ITU G.709.3/Y.1331.3 "Flexible OTN long-reach interfaces" adds a stronger FEC option for 100, 200 and 400 Gbit/s Flexible OTN (FlexO) 450km-reach interfaces.
The revision also provides for the direct multiplexing of different OTUCn signals into the FlexO payload area, "a shift from providing the physical layer for a single OTUCn," says Steve Gorshe, Microchip Technology, Rapporteur for the responsible working group (Q11/15).
ITU G.709.1/Y.1331.1 (Amendment 2) "Flexible OTN short-reach interfaces" provides additional FlexO security with encryption and authentication for FlexO links.
The updates to the ITU G.709 series follow a key extension to OTN technology in ITU G.709.4 "OTU25 and OTU50 short-reach interfaces", a new ITU standard designed to support IMT-2020/5G
