115,200 is a standard RS-232 serial baud rate.
The USB should be one of 3 speeds: Low Speed (1.5Mbs) Full Speed
(12Mbs) or High Speed). USB does not support 115,200.
HP also does not have a USB.org sponsored logo. It does not indicate if
it is USB 1.1 or USB 2.0. Most high speed devices have a USB.org logo
that says :"Hi-Speed"
Are any of the HP engineers lurking in this group, who can answer the
question? The HP Help Center can't.