[time-nuts] Serial-Ethernet

Joseph Gray jgray at zianet.com
Thu Feb 25 08:50:01 EST 2016


There were two reasons I bought from Amazon, instead of ebay. First, I
got it within 2-days w/Prime shipping, instead of two or more weeks
from China. Second, it is easier to return things to Amazon. In fact,
the first serial-Ethernet device I ordered had to be returned. It came
with a bad power supply and even with a good supply, did not work. I
felt that it was worth spending a bit more for these conveniences.

As for a multi-port device, yes, that makes sense. I'll see if I can
find something similar on Amazon.

What USB-Ethernet devices have you had good luck with? I am
considering a somewhat expensive Silex device. I did buy a used
Belkin-branded box that was made by Silex, but it kept
disconnecting/reconnecting the USB devices. This seemed to be a common
problem with this particular Belkin box.

Joe Gray

On Thu, Feb 25, 2016 at 1:38 AM, Tom Van Baak <tvb at leapsecond.com> wrote:
> Joe,
> Thanks for that posting. I've also used a lot of LAN or USB to RS422 converters, as well as RS232/422 adapters on my Z3801A.
> Before you commit to Amazon, note there are many Ethernet/RS422 offerings on eBay.
> Just do an eBay search for: RS422 ethernet
> Or to uncover even more listings, in the search box, type:
>     RS422 (Ethernet,LAN,TCP/IP,Network)
> I see there's some local ones (USA) for less than your Amazon find:
> http://www.ebay.com/itm/201326888567
> http://www.ebay.com/itm/181841884873
> There are also inexpensive bare-board versions like:
> http://www.ebay.com/itm/131700539876
> And, if you have a couple of 422 devices, consider the economics of a 4-port unit like:
> http://www.ebay.com/itm/301881123530
> I have no affiliation with any seller, nor have I tried these specific items. But they are inexpensive and look worthwhile. OTOH, I'm nervous about any networking product made in CN even if its web interface says "IOT Experts" and "Be Honest, Do Best!"...
> /tvb
> ----- Original Message -----
> From: "Joseph Gray" <jgray at zianet.com>
> To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
> Sent: Wednesday, February 24, 2016 9:01 PM
> Subject: [time-nuts] Serial-Ethernet
>>I just thought I'd report about a serial to Ethernet interface I just
>> bought. I got one of these:
>> http://www.amazon.com/gp/product/B00ATV2DX2
>> At the moment it is hooked up to my Z3801A and I am using Z38XX.exe
>> from across the network. Using the included software and driver, I
>> have the RS232 port mapped to COM 7 on my local PC.
>> I bought this particular model not only because of price, but because
>> it also does RS422. I will test this capability with my Lucent GPSDO
>> with the RS422 ports. If it works, I'll order another one just for the
>> Lucent.
>> Joe Gray
>> W5JG
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