How do wireless intercom systems work?

Related questions

1. What is intercom used for?
2. How much does intercom cost?
3. What is intercom app?
4. What is e1 in telecom?
5. What's the difference between PRI and SIP?
6. Do I need a special phone for VoIP?
7. How do PRI lines work?
8. How does an intercom work?
9. What is PRI and SIP?
10. What is PBX number?

Tags

1. #wireless
2. #allotted
3. #voice
4. #agencies
5. #systems
6. #without
7. #various
8. #intercom
9. #frequencies
10. #between
11. #radio
12. #communicate
13. #telecommunications
14. #government
15. #enables
16. #stations
17. #wires
18. #communication
19. #using
20. #device
21. #copper
22. #waves