If you can download it, it's free, if not you have to pay for it !!
From what I can see at
http://www.dungog.net/sme/files/index.phpand reading the SMEHELP.CHM file (in Dialup Tools section)
dialmon-0.8-1.i386.rpm
and
dialmonW95.zip
are free,
but if you want additional control and functionality you need to
purchase and then go to login.dungog.net to get the dungog-ispconnection rpm
Setup Instructions for dialmon
1. Read about the dialmon daemon from
www.quaking.demon.co.uk/dialmon.html This is the tool we use to control the connection.
2. Download and Install
download from dungog.net/sme/files and install rpm -Uvh dialmon-0.8-1.i386.rpm on the server
then either install the dialmon windows client, dialmonW95.zip on your pc's [Note for the dialmon client config we use port 7390 not the default 7002]
or delegate the internet connection user-panel
Regards
Ray