asterisk users - Feb 2012 - Aastra phone dial plan

All,

I'm trying to configure the dial plan for my company phones.

I'm seeing that there's a recommended dial plan of "X+^" and
then check
the "send dial plan terminator"

This seems to work ok.  However I'm also seeing that a lot of people 
completely specify their plan like this:
"1[2-9]xxxxxxxxx|[2-9]xxxxxxxxx|60[2-9]|6[1-2][0-9]|63[0-2]|70[0-9]|71[0-5]"

Is there a benefit to specifying the full dial plan?  Or should I just 
use the smaller plan that matches everything?

Thanks,
Brian