StarTech.com USB to Serial Hub - 16 Port - COM Port Retention - Rack Mount and Daisy Chainable - FTDI USB to RS232 Hub (ICUSB23216FD) - seriel adapter - USB 2.0 - RS-232 x 16
Tripp Lite 16-Port USB Charging Station with Syncing 230V 5V 40A (200W) USB Charger Output 2U Rack-Mount charging station - 16 x 4 pin USB Type A - 200 Watt