Re: USB "null modem" cables and related Linux driver questions
- Date: Fri, 1 Jun 2018 04:56:32 -0500
- From: Richard Owlett <rowlett@xxxxxxxxxxx>
- Subject: Re: USB "null modem" cables and related Linux driver questions
On 05/31/2018 06:58 PM, David Wright wrote:
On Thu 31 May 2018 at 09:21:27 (-0500), Richard Owlett wrote:
I have two computers with USB ports.
I wish them to communicate as simply as mid-20th-century computers did.
Then we used RS232-C with a null modem &/or appropriate software
software at both ends.
I remember soldering these cables together. It always seemed crazy to
be paying as much for a cable as a floppy drive.
The underlying problem is that both ends egotistically expect to be
The hardware problem is solvable [e.g.
(thanks for your link) gives an idea of the price, and in this case I
can see some justification for it because they describe the
electronics hidden inside the plugs (we hope).
But considering that two NICs cost less than that cable, I'd need a
pressing reason to purchase the cable instead.
There is a perceived elegance aspect.
There is also a practical aspect the only known working and conveniently
physically accessible ports are USB.
The software is another case :<
The best Linux specific link I've found is dated September 2005
I've done DuckDuckGo searches for permutations/combinations of
usb, "peer to peer", lan, and bridge.
Most is Windows/Mac centric.
There were hints that needed drivers may exist in current Linux core.
Pointers to good references and/or better search terms?
"ppp over usb" gave me http://www.linux-usb.org/usbnet/
which might be what you want. I notice that such a module is
in the production kernels.
I had seen the page. It told me that I was not pursuing an
impossibility. I was hoping for a more recent reference than 2005.