I have a remote VOIP (Radio over IP actually) application and planned on using a router to the internet(The router is not a Cisco because we need to use a mobile router that supports a USB connection to a Sprint aircard) and a PIX 506E to handle VPN connections. I have recently found out that I need GRE Tunneling Protocol to pass the VOIP broadcast packets across the internet through the VPN connection.
First question. Does the PIX-506E support GRE Tunneling Protocol?
Second question. Does Cisco have Windows client software to connect to a VPN connection that can use GRE Tunneling protocol? If they do is there a cost for it?
And my last question. Am I going about this properly or is there a better way? Any help anyone can give me will be greatly appreciated.