We are trying to configure the cisco ATA 186 behind NAT ( We are Using winroute) to work with our gatekeeper (Voicemaster). It seems its configured and we are able to access it thru web configuration page. The problem is we are unable to place any calls and we also donot hear any dial tones. We are at a loss that what we are missing? If someone could help we appreciate it. My yahoo ID: mmaphone. Best Regards.