The USRACK chassis is designed to hold up to 14 single-width fiber optic modules. The internal power supply is 4 RU high. The chassis is designed to mount into an EIA-standard, 48.26 cm (19-inch) rack.
The USRACK fiber card cage features automatic electronic current limiting at each module rather than limiting current at the power supply. With this design, if a fiber module fault occurs, only the faulty module will shut down. All other modules within the rack will continue to operate unimpaired.
The automatic current limiting feature of the USRACK is also self-resetting. This allows the unit to handle a temporary or intermittent fault or overload. Modules in the chassis are hot-swappable, allowing the rack to remain powered when removing or replacing modules.