As we all know SMS is like a pizza that you can order in when you need to and otherwise ignore. It's not like its a culture that needs to be built, or a system that is owned by all staff. Dial-an-SMS sounds good, delivery within 30 minutes, and then pop the manual in the bottom drawer to be pulled out only when certification or audits come up.
Hmm and these guys are supposedly preaching to the ATC world about the optimising and modernisation of ATM...