So, presumably, you want to hook up a usb-to-serial cable from your PC
serial port to the usb port of the cable box. The issue is that the
cable box expects to be the usb host and so does a PC, whereas the
keyboard is the usb "client". I'm not sure how a usb-to-serial adapter
presents itself to another usb host, but if it's only designed to work
with usb clients, I'd guess that a driver would have to be written to
emulate a usb client through the serial port, if it's even possible.

The PC expects to be a usb host if you plug a USB device into it. a
Usb->serial adapter will only look like a usb device on the usb side -
the serial side will look like nothing but a serial cable. If the cable box is
designed to be the usb host and will take incoming commands from a usb->serial
adapter, it sounds like it will work (I will be trying the same thing on my satellite
STB once I get my usb->serial adapter in the mail).

That would be ideal, and would certainly be an inexpensive option. The
only box I came across that actually says it emulates a usb kbd from
either usb or serial connection to the PC host is a couple hundred
bucks.

I'll look into how it works, but a "port" converter may just connect the
wires correctly to allow communications.

yeah, if the port converter works, that's def the way to go. It's around $9 or $10 for
one of those converters if you shop around online.


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