Interesting, the junction boxes here in the USA are full of 12v batteries to ensure they remain working when power goes out. And when I was renting at a place

Interesting, the junction boxes here in the USA are full of 12v batteries to ensure they remain working when power goes out. And when I was renting at a place with just VOIP, the modem had a slot for a battery to ensure the telephone remained operational when power went out. Do neither exist in AU?