List some advantages/disadvantages of VoIP ?

The advantages of VoIP are as follows:

1. It does not cost extra as long as we have a device with an Internet connection and are using it for personal use. Of course there are paid versions available for professional requirements.

2. Many VoIP based software such as Skype, are easily downloadable.

The disadvantages of VoIP are as follows:

1. VoIP is possible if both the caller and the receiver have the right software and hardware to speak to one another.

2. There is no guarantee of call's audio and video quality when using the Internet.

3. It uses Internet Protocol's packets so if packets get dropped along the way then voice quality drops.

4. Even with its high quality, it cannot match up the voice quality of a normal telephone line.

5. It may not work for emergency service numbers like Police or Fire Services regular numbers.