Hello,
I'm sorry for my language I don't speak English very well.
I've some problems with my 7912. Indeed, they are rebooting 2 or 3 times peer days, during talk or when we don't use them.
My ISP said that my problem was from my Firewall. I don't understand because we didn't have any problem during many months.
TFTP serveur is configured and the second too.
We have 15 cisco 7912 and 2 polycom... Polycom never rebooted.
I hope you will find a solution.
Best regards
Thomas