3. source)

4. sink)

5. 3. channel)

6. 4. encoding)

7. 5. decoding)
6. noise)

8. -
-

9. 2

10. -
2

11. -
2

12. -

13. - Microwave system)
- Satellite Systems)
- Radio)

14. One-way communication)
>>>>> >>>>>

15. Reaction time
Line turnaround time System turnaround
time