                        +-----------+                        
                        |   user    |                        
                        |           |                        
                        +-----------+                        
                            |    |                           
                        +---+    +---+                       
                        |            |                       
                        |        make call                   
   +----------------+   |            |                       
   |                |access          |                       
   |   +------------|---|------------|----------------------+
   |   |            |   |     network|                      |
   |   |            |   |            v                      |
   |   |    +-------|---|----+   +---------------------+    |
   |   |    | online|portal  |   |     cell tower      |    |
   |   |    |       |   |    |   |                     |    |
   |   |    |       v   v    |   |                     |    |
   |   |    |    +-------+   |   |    +-----------+    |    |
   |   |    |    |  ui   |   |   |    |satellites |    |    |
   |   |    |    |       |   |   |    |           |    |    |
   |   |    |    +-------+   |   |    +-----------+    |    |
   |   |    |                |   |      |    |   |     |    |
   |   |    +----------------+   |      |    |   |     |    |
   |   |                         |      |    |   |     |    |
   |   |                         |    send sendsend    |    |
   |   |                         |      |    |   |     |    |
   |   |                         |      v    v   v     |    |
   |   |                         |    +------------+   |    |
   |   |                         |    |transmitter |   |    |
   |   |                         |    |            |   |    |
   |   |                         |    +------------+   |    |
   |   |                         |           |         |    |
display|                         +-----------|---------+    |
   |   |                                     |              |
   |   |                                phone logs          |
   |   |                                     |              |
   |   |                          +----------|--------+     |
   |   |                          |  data processor   |     |
   |   |                          |          v        |     |
   |   |                          |    +--------+     |     |
   |   |                          |    |storage |     |     |
   |   |                          |    |        |     |     |
   |   |                          |    +--------+     |     |
   |   |                          |                   |     |
   |   |                          +-------------------+     |
   |   |                               |                    |
   |   +-------------------------------|--------------------+
   |                                   |                     
   +---------------+   +---------------+                     
                   |   |                                     
                   |   v                                     
               +-----------+                                 
               |api server |                                 
               |           |                                 
               +-----------+                                 
                     |                                       
                  persist                                    
                     |                                       
                     v                                       
                 +-----+                                     
                 |logs |                                     
                 |     |                                     
                 +-----+                                     
