I'm getting this error when I dial from a digital phone to an IP phone on my demo, and vice versa. I can successfully dial from my IP phone to my wireless phone, and vice versa.

1. The license keys are correct.
2. The IP address's are correct.
3. I defaulted the IP phone and re-entered in the ip address's to no avail.
4. I uploaded a known good database.

The phone worked fine for a week.

Any suggestions?