"EFTPOS is down" is yesterday's problem. It is unacceptable. Let us eliminate the points of failure.

Using the public internet is the safest and lowest cost option, if everyone does their job:
 
• Tyro's two secure data centres run without
  single points of failure. They are designed
  not to fail.
• Tyro uses Optus and Telstra IP core and
  Optus, Telstra and Vodafone GPRS
  private APN networks. They are designed
  and built to be fault tolerant.
• Tyro's military grade encrypted transactions
   are routed over the 'always on' internet.
• You should set-up your internal network
  keeping it simple and secure.
• You should select a connectivity option
  that provides you the resilience you need.
• You should consult your IT department or
  IT service provider.