The document discusses various communication devices and methods for wireless communication, including broadcast radio, cellular radio, microwaves, and infrared signals. It outlines different transmission modes such as asynchronous and synchronous, as well as transmission directions like simplex, half-duplex, and full duplex. Additionally, it lists essential communication devices like modems, routers, and multiplexers.

1. BY:::Gurpreet Singh
COMMUNICATION
DEVICES

2. COMMUNICATION

3. COMMUNICATIONS REQUIRES:

10. WIRELESS
 BROADCAST RADIO - for radios/television.
 CELLULAR RADIO - for mobile communications/cellular
telephones.
 MICROWAVES - radio waves that provide high speed
signal transmission.

11. COMMUNICATIONS SATELLITE - a space station
hat receives microwave signals from an earth based
station.
 INFRARED – sends signal using infrared light
waves.

12. TRANSMISSION MODES
• A) Asynchronous transmission
• B) Synchronous transmission

13. TRANSMISSION DIRECTION
• A) Simplex transmission
• B) Half-duplex transmission
• C) Full duplex transmission

14. COMMUNICATIONS DEVICES

15. MODEM

16. CABLE MODEM

17. MULTIPLEXER (MUX)

18. NETWORK INTERFACE CARD

19. REPEATER

20. ROUTER