Pagers... Help!!

[Brax]

Hi all,

 

I have been given a project to setup and document some new pagers for the medical team. The pager unit in question is the Retekess TD175 Guest Paging System. I've paired them and the range is pretty good even through walls but there doesn't seem to be a call all function? Looks like you have to individually type them all in. Does anyone have experience with this pager unit or a similar one in question and has an idea of what I can try? I've read the manual thoroughly and the only thing I can see is to turn them all off by dialing 999 on the unit.