Interested in a customized (open source) soft-phone which automatically connects to SIP server using VPN connection.
Software is required to run on both Windows and Linux. MAC/Apple would be bonus and not required.
User would need only to enter name/password into the soft phone in order to connect and begin using the services.
Even better would be if soft phone ran on USB device with headset connection or PC headset connection.
NOTE: One other option would be a SIP Proxy which uses tunneling due to restrictive firewalls where remote users do not have access to the firewall but need to reach the SIP server over the Internet.