I need a usb3 to rs232 adapter that WORKS RIGHT

On 15/08/2019 09.30, Andy Burns wrote:
Ant wrote:

Don't network devices still use serial ports too? Or is that finally
moved on?

For console ports? yes, they may be disguised as 'RJ45' connectors, or a
USB port that has an embedded USB-RS232 chip, but they're still serial
consoles, and life-savers they can be too ...


My PSUs have those.

--
Cheers, Carlos.

Carlos E.R. wrote:

I just saw this:

https://www.digi.com/products/networking/serial-connectivity/serial-device-servers/portserverts

I've got Emulex and Moxa terminal servers stashed away here, not used
either of them for years but would be loathe to throw them away ...

On 8/14/19 8:24 PM, Ant wrote:
T wrote:
On 8/13/19 1:57 PM, Ant wrote:
Yep. I used external dial-up modems back then and laplink cables. I
don't think I ever use printers on those COM/serial ports since I used
parallel.

I have a few customers who still use com ports on their
point of sale printers and one that uses a com port
for a package weigh scale.

Don't network devices still use serial ports too? Or is that finally moved on?

Ethernet is serial. it's not RS232.

--
"To assert that the earth revolves around the sun is as erroneous as to
claim that Jesus was not born of a virgin." -- Cardinal Bellarmine 1615,
during the trial of Galileo

Sam E wrote:

Ethernet is serial

If you want to phrase it like that, then if it's faster than 100Mbps and
over copper, it's parallel :-)

On 8/14/19 10:43 PM, Paul wrote:

[snip]

Â*Â* "1Mbit/sec is all we will ever need"

with a smirk on our faces. For that was the rate
at which users stopped complaining :-) Naturally,
if we could offer more than that, it put a smile
on their faces. People would have killed back
then, for 10Mbit/sec Ethernet.

Now it's 10Gbit/sec.

When telling someone how much RAM is in my computer, sometimes I make a
mistake and say 32KB.

People today are spoiled by excess.Â* A person
with a 10Mbit/sec Ethernet connection would tell
you they "felt like they were in prison". Think how
long it would take to transfer a Macrium backup
to your NAS, on something like that.

I now have 100M/10M internet, and not don't seem to have a need for
faster, even though my ISP keeps advertising 400M/40M for "only
$20/month more".

Â*Â* Paul

--
Mark Lloyd
http://notstupid.us/

"I refuse to be labeled immoral merely because I am godless." [Peter
Walker on alt.atheism]

In article , Paul
wrote:

Don't network devices still use serial ports too? Or is that finally moved
on?

Some Apple protocol did that.

you're referring to appletalk, which used the serial ports on the early
macs and ethernet ports on later macs.

At the time, the CPU load was intense enough, the CPU stayed
in a loop while transferring data. Once a packet was sent, the
CPU could go back to editing your Word document.

false.

https://en.wikipedia.org/wiki/LocalTalk

localtalk is the original appletalk hardware, renamed when appletalk
could run on ethernet cabling, known as ethertalk. tcp/ip could run on
either one.

more commonly, people used phonenet, which was ordinary phone cord,
which was already in the walls, making setting up a network effortless.
the phone used one pair and the network used the other.

"the Mac was given expensive RS-422 capable serial ports.

the ports weren't expensive.

The ports were driven by the Zilog SCC, which could serve
as either a standard UART or handle the much more complicated
HDLC protocol

yielded the fastest rate available, namely 230.4 kbit/s"

230.4kbit internally clocked and up to 1 mbit externally clocked.

So that was an example of trying to build a network for "cheap".
Cheap and not very cheerful.

actually quite cheerful. nothing at the time came close and it worked
exceptionally well.

We determined empirically back in those times, that

"1Mbit/sec is all we will ever need"

with a smirk on our faces. For that was the rate
at which users stopped complaining :-) Naturally,
if we could offer more than that, it put a smile
on their faces. People would have killed back
then, for 10Mbit/sec Ethernet.

in 1984, built in networking and 1 mbit ports standard on every
computer was unheard of. modems were 2400 bps, or slower.

tcp/ip support appeared around 1987, along with ethernet cards,
initially thinnet and later 10b-t, long before winsock.

around 1990, ethernet started to become standard on mac logic boards,
with no need for additional cards (although that was still an option
for additional ethernet ports).

On Thu, 15 Aug 2019 01:55:25 -0400, Paul wrote:

Char Jackson wrote:
On Wed, 14 Aug 2019 23:43:08 -0400, Paul wrote:

People today are spoiled by excess. A person
with a 10Mbit/sec Ethernet connection would tell
you they "felt like they were in prison". Think how
long it would take to transfer a Macrium backup
to your NAS, on something like that.

I just wired my house with Cat6a so I can (someday) have 10Gbit
transfers. At work we have 40Gbit connections. How did we ever get by
with less?


What kinda wire does the 40Gbit use ? :-)

Glass, not copper, of course. On that equipment, we get some decent
throughput speed by bundling two 40Gbit links into an 80Gbit trunk.

And there's a Cat 8.

I went with Cat6a because Cat7 and Cat8 aren't official standards.

Andy Burns wrote:
Sam E wrote:

Ethernet is serial

If you want to phrase it like that, then if it's faster than 100Mbps and
over copper, it's parallel :-)

It's because more than one pair of wires is used.

I think 10/100BT are like this.

1,2 TX pair \___ so this flavor, full duplex, is still serial
3,6 RX pair / (Straight or crossover cable may be needed.)

GbE is four pairs running PAM-5.

1,2 ?? pair
3,6 ?? pair
4,5 ?? pair
7,8 ?? pair

https://en.wikipedia.org/wiki/Ethern...r_twisted_pair

This entry is interesting, in that it says Pairs_Required is 4
and Lanes per direction is 4.

1000BASE‑T 802.3ab-1999 (CL40) Current 1000 4 4 4

https://en.wikipedia.org/wiki/Gigabit_Ethernet

"In a departure from both 10BASE-T and 100BASE-TX, 1000BASE-T
uses four lanes over all four cable pairs for simultaneous
transmission in both directions through the use of
echo cancellation with adaptive equalization called
hybrid circuits[17] and five-level pulse amplitude modulation
(PAM-5)."

So it's parallel, four bits at a time, with two signals mixed
on the cable at the same time.

Not that anyone cares of course :-)

The most interesting part of this for me, is how hard it is
to find pictures and information for it when Googling.

Paul

On Thu, 15 Aug 2019 08:28:46 -0500, Mark Lloyd wrote:

I now have 100M/10M internet, and not don't seem to have a need for
faster, even though my ISP keeps advertising 400M/40M for "only
$20/month more".

Similar situation here. 300/300 was the slowest I could get that had
unlimited data, ($40/mo), but it turns out that I routinely get 390/390.
It's nice when you get more than they advertise. Anyway, they keep
reminding me that I can get 1000/1000 for just $20/month more. I don't
really need it, though.

On 15/08/2019 23.22, Char Jackson wrote:
On Thu, 15 Aug 2019 08:28:46 -0500, Mark Lloyd wrote:

I now have 100M/10M internet, and not don't seem to have a need for
faster, even though my ISP keeps advertising 400M/40M for "only
$20/month more".

Similar situation here. 300/300 was the slowest I could get that had
unlimited data, ($40/mo), but it turns out that I routinely get 390/390.
It's nice when you get more than they advertise. Anyway, they keep
reminding me that I can get 1000/1000 for just $20/month more. I don't
really need it, though.


I had 600/600 for some time, and I dropped it to 100/100, for a few
euros less (not even 10€).

--
Cheers, Carlos.

On 15/08/2019 15.23, Sam E wrote:
On 8/14/19 8:24 PM, Ant wrote:
T wrote:
On 8/13/19 1:57 PM, Ant wrote:
Yep. I used external dial-up modems back then and laplink cables. I
don't think I ever use printers on those COM/serial ports since I used
parallel.

I have a few customers who still use com ports on their
point of sale printers and one that uses a com port
for a package weigh scale.

Don't network devices still use serial ports too? Or is that finally
moved on?

Ethernet is serial. it's not RS232.


And USB.

--
Cheers, Carlos.

On 8/15/19 8:28 AM, Andy Burns wrote:
Sam E wrote:

Ethernet is serial

If you want to phrase it like that, then if it's faster than 100Mbps and
over copper, it's parallel :-)

Sounds like nonsense. The definitions of "serial" and "parallel" have
nothing to do with speed or conductor material.

--
"To assert that the earth revolves around the sun is as erroneous as to
claim that Jesus was not born of a virgin." -- Cardinal Bellarmine 1615,
during the trial of Galileo

On 8/15/19 12:58 PM, Paul wrote:

[snip]

So it's parallel, four bits at a time, with two signals mixed
on the cable at the same time.

4-bit parallel, or 4-lane serial (like PCIe x4)?

Not that anyone cares of course :-)

The most interesting part of this for me, is how hard it is
to find pictures and information for it when Googling.

Â*Â* Paul

--
Mark Lloyd
http://notstupid.us/

"I refuse to be labeled immoral merely because I am godless." [Peter
Walker on alt.atheism]

On 8/15/19 4:38 PM, Carlos E.R. wrote:

[snip]

Ethernet is serial. it's not RS232.


And USB.

USB3 has the same unknown as 1G ethernet (is it parallel or multilane
serial)?.

--
Mark Lloyd
http://notstupid.us/

"I refuse to be labeled immoral merely because I am godless." [Peter
Walker on alt.atheism]

On 8/13/19 4:15 PM, Rene Lamontagne wrote:
On 2019-08-13 5:42 p.m., T wrote:
On 8/13/19 1:26 PM, rp wrote:
On Tue, 13 Aug 2019 09:30:06 -0800, Bill Bradshaw wrote:

If I don't get the cable adapter working, using an old
laptop as a server is a good idea.Â* But make sure it
has a USB port free to run a "sneaker" net over to
it.Â* And leave the old laptop sitting on the CNC
machine's utility table.

How about the cheapest small computer you can find that has the
power (I am
assuming computation power) that can run the program and you can
stick a
rs232 card in?Â* This would be less costly than a laptop.

You can still get motherboards with com ports built in. The Asus
Q270M-C/CSM has two com headers for instance and that was the first
board I looked at.


Supermicro has them too, but just headers.Â* You have to
buy your own bracket.Â* Some Lenovo desktops come with
a single db9 on the back still

My new Asus z390 prime MB has one com header on it.

Rene


So does my Supermicro X11SAE-M.