Along with 2 USB 1.1 hub ports, SeaLINK+4M.SC and SeaLINK+8M.SC respectively offer 4 and 8 serial ports that are software-configurable for RS232, RS422, or RS485. Both adapters, configured at one computer and deployed to others, maintain electrical interface settings locally and use state-machine architecture that supports 921.6 Kbps data rates. Serial ports appear as standard COM ports to host computer and provide up to 500 mA (each) to connected 5 V peripherals.