On 07/08/2020 06:55 PM, H wrote: > On 07/08/2020 11:58 AM, John Pierce wrote: >> On Wed, Jul 8, 2020 at 8:46 AM H <agents at meddatainc.com> wrote: >> >>> I believe I mentioned that the UPS has the serial port, the computer thus >>> has USB. >>> >>> >> yes, but is it 'basic serial UPS' or is it 'enhanced serial UPS' ? the >> former do NOT use the rx/tx data of the serial port at all, they ONLY use >> the serial port control signals, and they probably will NOT work with a >> USB port because they require very specific behavior from those signals at >> power up and reboot times. >> >> the latter DO use the serial data, and may work with USB serial. >> >> > I forgot to mention that I do have the serial cable for the APS UPS since the previous computer it supported did have a serial port. Thus, the only issue should be whether to buy a USB-serial adapter for the computer, or a card with a serial port. > Closing out the above. I bought a Belkin USB-to-Serial adapter and after also getting the correct APC cable for this old APC BackupUPS things work as intended. Thus, no issues with the USB-to-serial adapter in this setting.