My company currently has a Cudatel phone system that we will most likely be replacing with 3CX. As part of our DR discussions i have some questions. If we have a private cloud in a local data center with the Master 3CX unit at this location and a Slave 3CX unit at our office bridged i have the following questions: 1. If the internet goes out at the office, can i use the 3CX app on my smart phone to make and receive calls? 2. Would i be better off not having a bridge and only a Master in the private cloud and have nearly 70 phones at the office just be remote phones? 3. What is the impact of having that many remote phones on the internet service? I am open to suggestions if you guys have any other ideas for a disaster recovery scenario. Thanks.