Advantages and disadvantages of digital transmission?

1. The signal is exact. For example, Digital formats like PCM (Pulse Code Modulation) can hold the exact digital format of sounds.

2. Digital signals can checked for errors. Generally, all digital transmission methods use 'head labels' to provide better checking facilities. Head label may contain how many packets may need to complete the transmission, what is the sequence number of each packet of data, acknowledgment labels etc.

3. A variety of services can afford over one line. For example, IpTV connection can used to watch cable TV channels while browsing the internet through a PC using same line. This line can also used to make a phone call at the same time.

4. Digital data can be compressed and therefore possible to pass over higher bandwidths. Any digital data; data, image, video, voice can be compressed.

5. More secure. Digital data can be encrypt using an encryption method. Only the dedicated receiver can decode the message.

6. Supports data integrity. Simple to integrate voice, video and data. Digital transmission provides easier way to integrate different digital formats.

7. Digital transmission provides higher maximum transmission rates via medium such as optical fibers. Typically, digital transmissions use less bandwidth.

Disadvantages::::::::

1) digital equipment costs more and is much more complex.

by Abdullah

cu-516-A

cecos university