In some cases when a company has two sites and users that move between the sites with their soft phone there becomes an issue with 911 calls. Would like to see adding one more option that allows outbound rules for internal subnets that states when calling from this IP range and number called is 911 use this trunk. This would allow for the proper address to show up to the 911 operator. I know you can do it with the groups and extensions however mobile users (internal to the company) would have to be moved from one site to another site group to allow this feature. If the phone system sees where the calling ip address is located it could then route the call to the correct outbound trunk.