Singtel would ensure that you get quality conference call experience to meeting your specific needs. When you connect the PC or any other device to a virtual private network (VPN), you should rest assured that the computer acts as if it has been on the same local network as the VPN.
The entire network traffic would be sent to a secure connection to the VPN. With your computer appearing to behave as if it were on a network, you would find it easier to enable a secure access over the local network resources regardless of being anywhere in the world.