Tenant Global Dial Plan

I can successfully create a dial plan with normalization rules and assign the tenant dial plan to users via the grant-cstenantdialplan cmdlet, but I'd like to have the tenant dial plan be global and apply to all users without having to use the grant-cstenantdialplan cmdlet per user. Watching the Skype Academy session they make reference to the tenant global dial plan but I didn't see any examples on how to set it. How do you assign a tenant dial plan globally?

Thanks,

Dave