The workgroup switches in the new MACH100 range are designed for use in control cabinets; they offer up to 24 ports. They are available as fixed port versions or modular workgroup switches. There are also variants with two optical 10 Gigabit uplinks, fanless cooling, redundant power supply and non-heating appliance power plug, or an external power supply. Additional features of the workgroup switches include extensive management and redundancy capabilities, as well as various configuration and diagnostic functions. A USB interface can be used to connect the ACA 21 autoconfiguration adapter, which can be used to save all configuration data as well as conveniently upgrade or downgrade the workgroup switches operating system.