We've got several desks set up with Mitel 6930 IP phones with a Button Box sidecar. I have a setup exactly like the other desks for testing/etc precisely to troubleshoot situations like this. I was able to restore normal function to my setup by removing the Dial Number function from the button box, saving, and then re-adding the extension.
(At this point, I'm just trying to clear the error and look into the cause later.) When I log into other extensions to repeat the process, I get the following error when trying to save the configuration.
The technical details below regarding this error may be requested by support technicians:
{"user_prog_button_button_2_boxes.CallStackPosition":["must be less than or equal to 4"],"user_prog_button_button_0_boxes_attributes":[null,null,null,null,null,null,null,null,null,null,null,null],"user_prog_button_button_1_boxes_attributes":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"user_prog_button_button_2_boxes_attributes":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,{"CallStackPosition":["must be less than or equal to 4"]},{"CallStackPosition":["must be less than or equal to 4"]}],"user_prog_button_button_3_boxes_attributes":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"user_prog_button_button_4_boxes_attributes":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"toolbars_attributes":[]}
I've also tried rebooting each extension and removing/re-adding the extension from the workgroup. There are no availability states to change and I've cycled the extension's status within the workgroup. I've submitted a ticket to the service provider but wanted to reach out on here at the same time.
-bb