Updated below
I had a Vonage dial tone, but every time I tried to dial out, the dial tone would continue on through the number-pad entries, and the dialed number would sound busy. The dial tone continued sounding in the background. I was unable to connect to any dialed number.
I rebooted my modems and the Vonage modem, but still the dial out problem persisted.
As a last resort, I unplugged the power supply from my telephone, and then plugged it back in. That solved the problem in it’s entirety. I’m not sure why that solution worked. Possibly the problem had something to do with the phone’s circuitry when I turned off the power via the fuse box in order to install a ceiling fan.
All in all, I’m happy with my Vonage account. It’s much cheaper than a regular land-line telephone account and includes all the features in Vonage’s basic fee that would be cost-plus with other providers. Vonage is also much cheaper than those solutions sold by cable television and internet providers.
The only other issue I’ve encountered is the caller id time-set problem, which I covered here.
Update: I’ve had this dial tone problem occur one more time. Rather than reboot everything, I merely unplugged the phone’s power supply from the wall socket power outlet, plugged it back into the power outlet, and everything was good to go one more time. Why is it happening? I don’t know, but I consider it to be a minor annoyance.