Just to add I have also had issues with USB to RS232 adapters in general. In the end I went with a Brainboxes UC-101 and have had no further problems.
Actually took quite a lot of searching to even find the Brainboxes card since I needed one that supported both Windows 7, and Windows 7 64.
I'm very impressed that you have taken the time to research this problem for me, I expected you to come back with "our box is fine, it's a problem with Kermit95....". Good quality support goes a long way and based on that I would recommend your product to anyone.
I found the ES-357 very easy to use as a pure Telnet Server, it just worked!
I did solve my problem… My solution though came in the form of using the different serial card I mentioned before, a brainboxes PX-310, ... The freeze has never reoccurred. …
Creative NetVentures, Inc.
THANK YOU SO MUCH for your brilliant product (US-101)!! ...
We tried [many other brands] and a few other USB to serial adapters. None of them worked!.. I’ve been buying and returning like crazy. ...
I finally called IBM/Lenovo out of desperation and somewhere in their internal knowledgebase was a mention of your product working. So I bought one from Buy.com as a test.. it arrived today. IT WORKS! =)
You are likely the only manufacturer on the planet that makes a working serial to USB adapter for IBM/Lenovo. I would suggest you publish a page on your website including IBM/Lenovo/Windows7 keywords so that people can find you easier.
My nightmare is over thanks to your brilliant product. I just bought more!
If this isn't it, then there's something wrong with the COM connections between the device and the PC. Are you by any chance using a relatively cheap USB serial port adapter? You can get them down to about $10.
I found those to be a false economy -- you need a good quality one. I've now changed over to using serial port cards rather than USB adapters -- the one made by Brainboxes is very good, and works very well on my Windows 7 64 bits systems too! ;-)