I got so annoyed by this just now (see post above) I went into the feature list in the admin panel and found this:
"Provide the default telephone number you want your Vonage phone to forward to in the event your Internet connection is disrupted. When completed, click on the Submit button. To clear the Network Availability Number, click the "Remove" button."
So shame on me for not noticing earlier. They must have added this lately or I might just be blind. Scrap my post above.
