Thank you for the reply.
The link was for the 3CX VoIP Client v6 & not for 3CX Phone System v6.
However, I tried to configure the settings in it, but did not find the settings for following fields to set values : ...
Registar/Proxy Hostname = the proxy IP address from the file, (digits not hostname)
Registar Proxy Port = 5060
Outbound Proxy Hostname or IP = proxy hostname from file (ie proxy01.xxxxx.talk4free.com)
Outbound Proxy Port = 5070
Please refer the screenshot enclosed. I've highlighted the fields I've entered.
How do I go about on this ? or Do I Specifically need a 3CX Phone System v6 s/w ?