Relying on any Network requires a solution for Off Network situations. In our daily routine we encounter many patches of Off network (In buildings – stair cases, elevators, basements. Underground, Remote areas) and of course, it is much more likely that we face these situations in times of crisis, when connectivity is needed the most.
Here is one reminder from the tragic events in Brussels earlier this year:
PUBLIC SAFETY RADIO NETWORK ENCOUNTERS CAPACITY CHALLENGES DURING BRUSSELS BOMBINGS 31-03-2016 During last week bombings, ASTRID, the Belgian Public Safety TETRA network encountered a huge increase of traffic which resulted in a temporarily capacity problem. ASTRID, the TETRA radio communications network in Belgium, used by the security forces, has not functioned as desired, after the attacks of last week Tuesday, several media announced.
Also the GSM network was down and therefore in some cases WhatsApp had to be used by the security forces.
– See more at: http://www.lte-applications.com/27996/feeds/mission-critical-comms-news/public-safety-radio-network-encounters-capacity-challenges-during-brussels-bombings#sthash.0NoTqjEU.dpuf