I have just started experiencing this with a customer today - is anyone familiar with this problem? Even if minimal or no changes are made to the config file, a merge will act like an immediate reboot and disconnect all active calls. I'm using 2.1(15). Haven't heard of this occuring before, I'm just glad for now that I've made the determination of what is causing the reboots. Waiting to hear from Avaya on this as well.