One of the major prompts for getting a new system in place was the massive earthquake of February 22, 2011, said University spokesperson Alex Hanlon.
"The reason we've put them in is because, following the earthquakes of 2010 and 2011, we thought it would be extremely helpful to have a broadcast system."
When the $1 million system was officially launched on April 10 it would greatly improve the university's ability to respond to any future incidents, she said.
If someone walking across campus at night became concerned for their safety, they could run to the nearest tower and hit the emergency button, Hanlon said.
Cameras would immediately swivel around and zoom in on the activated station, giving security staff "eyes and ears" on the subject and surrounding space, she said.
"The idea is to see not just the person but also the area immediately around them, which is crucial if someone feels they are being stalked and about to be attacked."
Hanlon said although she hoped serious incidents would never arise, it was crucial that the university was ready for the worst-case scenario.
"In the US it's quite common to have shooters on campus," she said.
"That's not something we like to think about but one of the things we learnt from the earthquakes is it's better to be prepared."
The University of Canterbury is not the first in New Zealand to roll the system out.
In 2009, the University of Otago replaced its aging emergency phones with 16 Talk-A-Phone units located throughout the Dunedin campus.
"The phones have been an excellent investment as they act as a deterrent to crime and have enhanced the safety of the campus for staff, students and visitors to the University," said David Richardson, University of Otago's director of student services.