As optical networks are transitioning from 100G to flexible transmission rates that scale up to 600G to support hyper-connected architectures, new flexible multi-rate optical transmission devices and software are needed. Microchip Technology Inc. (MCHP) through Microsemi Corporation and Acacia Communications, Inc. (ACIA) are supporting this critical transition with the demonstrated interoperability between Microchip's DIGI-G5 Optical Transport Network (OTN) processor and Acacia's AC1200 Coherent Module [2]. The objective of the companies' collaboration is to enable the industry's first flexible rate system architectures with an established ecosystem to support the market's transition to 200G, 400G, 600G and flexible rate OTN networks built with new Flexible Ethernet (FlexE) and OTUCn protocols.