1. Plug an analog phone into the line and see if you hear a clear dial tone. Perhaps make a call and see if you hear any interference on the line.
2. Try to connect the line to a different SLI Port. There are times when particular ports can have issues.
I have a massive fax server with over 60,000 faxes received so far and its all running off the Samsung SLI lines using a C.O. PRI line.
DHL told me that I needed a dedicated analog line to download information from a computer they gave my shipping department. I just connected it to the Samsung SLI port and never had any issues.
Please let me know the outcome of your situation.
Thank you
