These USB/Serial adapters are by far the best

It works with straight serial cables, null modem cables, and every type of serial adapter I've thrown at it

Works with all Equipment requiring a Seaial Adapter.

Highly recommended adapter.

I tried various serial to USB adapters that didn't work and stumbled across this in a forum or review someplace and after reading other reviews on Amazon, decided to give it a try

Without a doubt the best USB serial adapter available.

Worked the first time (and every time since then!); Apparently the only adapter that works with Honeywell Compass 2.0

USA-19HS Hi-Speed USB Serial Adapter, PC, MAC, supports Cisco Break Sequence

Tripp-Lite, shame on you for ruining a perfectly good adapter to save a few pennies

The only DB9 to USB adapter that ever worked reliably with Apple computers for me

The Keyspan serial-to-USB adapter works like no other one I've ever used

This little adapter is a gem

The Keysapn High-speed USB-Serial adapter solved a problem that had me going through three other (cheaper) brand of adapter without good results

This adapter has now been to scores of factories for the past year, and it works perfectly every time.

Awesome adapter, plug and play instantly

Great adapter that works with Cisco cables, Motorola programming cables and Vertex/Yaesu programming cables.

i have purchased many of these adapters over the years, always flawless, use on Linux, etc.

This adapter works flawlessly.

In all cases where the device has previously worked with a standard serial port I have found that the Keyspan High Speed USB Serial Adapter with my Mac to work flawlessly

worked like a charm at 19200 baud!found out afterward the EFjohnson folks recommend this adapter for USB to Serial!Delivery was quick & in original package with driver CD etc.

Some adapters work great, some are next to worthless, and the Tripp Lite Keyspan is easily one of the former.

I used the same cables with an inexpensive adapter I bought off mono price and they work perfectly.

This serial adapter has a green LED that indicates when the serial adapter is active (recognized by the computer) and that blinks when data is passed over the serial connection

The adapter looks very well made, and it worked!

No other adapter works with that device

Hi speed USB Serial Adapter was very easy to use

The Keyspan adapter is the only brand I've used that has worked falwlessly with the specific devices that I'm using; no comm port errors or other conflicts as with some other brands.

Awesome adapter

I have used several different cheaper adapters that use the common Prolific chip and drivers.

This adapter works with Cisco console cable.

This USB to serial adapter qualifies in both categories.

The adapter we had for the register did not work with the new computer.

If you need to connect your laptop to a Cisco switch console port, any $8 serial to USB adapter will work

USA-19HS Hi-Speed USB Serial Adapter, PC, MAC, supports Cisco Break Sequence

I highly recommend this adapter if you are looking for a very good quality adapter that WILL work for you.

- I highly recommend this adapter.

Unfortunately, not all serial adapters are alike, and not all serial adapters work exactly like a Serial Port would - except for this TrippLite adapter.

Needed this adapter for a serial plug to USB and it worked exactly as described - enabled me to use the item I had purchased

with no one supporting serail these day you need a good adapter

At first I purchased a cheaper adapter for $10

Our new Laptop doesn't have a serial port and the Modem doesn't have a USB connector so this adapter provides the proper interface and works flawlessly and the performance is what is required for this type of setup.

Only adapter that worked for dbx brand unit with old serial port ... works consistently

this adapter works flawlessly!

Scan the web and you will see that nearly all of the cheap adapters cause nothing but trouble

Works fine as an adapter to mate non matching components and it works just

Works fine as an adapter to mate non matching components and it works just

I recommend the Keyspan adapter for a good serial to usb adapter.

The Keyspan USB-Serial adapter worked perfectly

However, this serial to USB adapter fully supports the RS-232 spec and will work with any serial device.

i was told that this was one of the best adapter out there

Older adapters will not work with XP Service pack 3.

This adapter works perfectly for Apple IIe to Mac transfers and vice-versa using the A2V2 and ADT software included in the Virtual II Apple II emulator.

The Keyspan Adapter worked great

One of the cheaper adapters I purchased would only work with drivers that were designed for Windows Vista, and even though I was able to make it work by installing that driver on my Win 7 box, as soon as I unplugged it and plugged it in again, the Vista driver was automatically over-written by the Win 7 driver, and the adapter stopped working

This adapter is rather expensive for what it does.

After spending a considerable amount of time with each one verifying port settings, uninstalling and reinstalling, I couldn't get either adapter to work with my receiver.

This Keyspan USB serial adapter works great.

This adapter solved all kinds of problems I was having with a Prolific adapter on my new iMac.

Yes, the Keyspan adapter may be a few dollars more than some of the other brands, but it will work with devices that the others will not

This adapter works PERFECTLY with my Garmin eTrex Legend GPSr

This adapter worked for me when NO other adapter would.

This adapter was recommended to me as the only one that worked with the software they produced.

I would highly recommend this adapter!

This adapter works extremely well to allow a USB port to emulate a serial port without any modification to the program.

I after trying several other cables I bought this adapter to work with my iMac Computer (OS 10.5.8) and a Zebra 2844 Label Printer

This Tripp Lite adapter works very well

One of the cheaper adapters I purchased would only work with drivers that were designed for Windows Vista, and even though I was able to make it work by installing that driver on my Win 7 box, as soon as I unplugged it and plugged it in again, the Vista driver was automatically over-written by the Win 7 driver, and the adapter stopped working

This adapter works with Windows 7 64bit and is a high-speed adapter unlike the one I had been using on a Windows Vista computer to do the same job.

Great adapter!

This adapter works well with Windows7 and most older industrial devices, plc's, etc.

-> RS232 adapters that work on the latest version of OS X has been problematic.

Works as it should once I

Works as it's supposed to.

As a matter-of-fact it is the only rs232-to-usb I would recommend as it is the only one I tried that actually worked!!

I plugged in my serial devices to the Keyspan and they worked just as they did when I plugged them in directly to a serial port

Unit worked exactly as it should, don't waste you money on cheaper ones, this is the one that works

Not a technical review, but I installed the software and it worked as it was supposed to

Works as it should once I

Works as it's supposed to.

As a matter-of-fact it is the only rs232-to-usb I would recommend as it is the only one I tried that actually worked!!

I plugged in my serial devices to the Keyspan and they worked just as they did when I plugged them in directly to a serial port

Unit worked exactly as it should, don't waste you money on cheaper ones, this is the one that works

Not a technical review, but I installed the software and it worked as it was supposed to