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