The VSC6803API Open Application Programming Interface (Open API) provides a comprehensive, user friendly, and robust function library that supports all Microsemi Ethernet switch, MAC, PHY, and Optical Transport Network (OTN) Mapper products and is available as MIT licensed software package. The VSC6803API is portable to any Operating System (OS) and was developed with 32-bit CPUs as intended targets. The driver software was developed in standard C and supports multi-instance device targets. The VSC6803API package includes driver software in standard C, application examples, and documentation. The architecture of the API includes five different layers: Application Interface Layer (function groups), Chip Interface Layer (register mappings), I/O Layer (register access), OS Layer (Linux, VxWorks, eCos), and Trace Layer.