To use serial attached devices with a client, you must attach them either to internal serial ports or by using USB-to-Serial adapters listed on the Sun Ray Peripherals List.

All ports except port A on the Sun Ray 170 support full handshaking and standard UNIX semantics. Port A on the Sun Ray 170 has no hardware handshaking pins, so it can't be used when a hardware handshake is required.

Symbolic links to the serial port device nodes are located under $UTDEVROOT/dev/term. Built-in ports are named "a" or "b", and serial adapter ports have longer descriptive names.

Serial ports become unowned during hotdesking, so you should make sure any serial port activity is stopped before removing your smart card or resetting the client.