cpsSerialPortSpeed 1.3.6.1.4.1.318.1.1.19.1.2.6.2.1.1.4

The speed of the serial port. Supported values are: 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200, 230400, and 460800