I had the same problem with my ATA 186. Vonage.com does not unlock the ATA adapter unless you pay $15.00. After paying $15.00, they do unlock the ATA adapter. This iswhat happened to me. It is a very very stupid thing that vonage does.
I suspect the devices are configured using TFTP provisioning with the tftp url pointing to a Vonage address. You might be able to redirect this to a TFTP server of your choosing and download a new config.
The surefire way of fixing this is to pull out the eeprom and reprogram it. I had a unit that got killed when the power dropped during a firmware upgrade. I opened a working unit and used an eprom burner to copy its eeprom over to the dead unit. I'm not sure of the legality of redistributing Cisco's firmware. If you can download the image from Cisco, I see no issue with getting someone to email you the eeprom version.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.