I am reaching out to you via a new topic on our HMS support forum regarding your support case in mysupport.hms.se. You sent an email in saying you were unable to access the ticket. This error will happen if you follow the link but are not logged into the portal. Once you are logged in you should be able to access the case. The following is my response to your inquiry.
This issue might be difficult to diagnose though just text. I would recommend giving our support like a call 312-893-5636.
Can you share the configuration you are using? When you take a log do you see any data from the Oaisis device? Can you also share your log?
We do not use the CTS and DSR pins for RS232. The serial protocol used is set in the subnetwork section of the configuration.