Please for all the participants in this forum if you don't have your answers from the NCH team Support so, don't start to cry or yelling, be practical and go directly to this Links, then maybe you will find all the answers that you need:
http://www.nch.com.au/hardware/setup/callrec/voip.html
http://www.nch.com.au/kb/10010.html
http://www.nch.com.au/talk/support.html#ZZZ
http://www.nch.com.au/support/supportfaq.html?reverse
http://www.nch.com.au/support/index.html
Thank you and all the best to you.