Chalk this up to IT guys that think they can do communications with Google and Asterix..
It is a legitimate (Aged Care) organisation and I an guessing they are trying to do there own Telecommunications. I am guessing that they have a default Asterix install not routing the calls to their new SIP service correctly.

Two missed calls from this number but when I call back I get the message "the number you have called is not in service please check ......" Sounds like the message is from an overseas call centre (American accent, very AT&T).