Everything worked fine for me, until I made a mistake in the dial plan: Instead of | 2_9 | I wrote||2_9|, then I clicked on save.
Cisco hanging.
When I pick up the phone - the red diode does not light, when the button is clicked, the IVR does not work, the web access does not work. When I lift the tube, I hear clicks.
I removed the lid and examined the card, there are contacts with the signature Jamp1, Jamp2, Jamp3.
People have tried shorting all three using paperclips to unlock this unit for Vonage users from prior years, but they had no luck, I don't know what the headers do and there is no docs, and sadly there isn't support for the unit anymore.
Very old firmware versions allow this command to default it - but it's likely beyond this point also, even IF you had a very old firmware with this security bug:
curl -d a http://ip-address-of-ata-186/dev
Sorry, I'm not sure otherwise and you might burn more time fixing it than replacing it if you're in a business at this point. :(
