Can anyone help with this. I work for a company that requires an Emergency (Out of hours) number for staff members. At the moment its a case of handing down a single phone to multiple staff members who are on call. I'm trying to find a way of using one (Emergency number) that can receive incoming calls on multiple mobiles. I had a look at google voice but i'm not sure if this would work as we operate in a phone/Internet signal dead zone.