I am trying to use these adaptors from DB 9 female (out of a Till computer) to a DB25 male on a Printer. A cable DB9 to DB25 works. The adaptors don’t when using a DB9 to DB( cable and adaptor.
Hello @brianrp and thank you for posting on our StarTech.com Community!
Sorry for the delay in response to this. The most common reason issues like this may happen would be due to potential pinout differences between varying serial products. So I would recommend comparing the pinouts of all the products being used comparing the working configuration to the non working configuration. Based on your description, it sounds like you may be trying to use our AT925FM. If so, the pinout for this adapter is as indicated in this image:
If the pinout of the working solution varies from this or perhaps involves a null modem configuration, this would definitely have an impact on whether this may work or not.
If this is something you would like to discuss in more detail or troubleshoot further, I would suggest reaching out to one of our Technical Advisors via our live chat which can be found on our website at www.startech.com and we would be happy to help!
Adam S.