Some examples of VoIP services include: Skype, TeamSpeak, Ventrilo etc.
Advantages:
- Low cost
- Free worldwide calls if you have a fast internet connection.
- Portability
- You can make and receive phone calls by signing into your VoIP account as long as there is a broadband.
- Video-conferencing
- VoIP allows improved video-conferencing and advanced bandwidth capabilities at a reasonable price.
- More features unlike regular phone service
- For example, call forwarding, call waiting, voicemail, caller ID and three-way calling are some of the many services included with VOIP telephone service at no extra charge. You can also send data such as pictures and documents at the same time you are talking on the phone.
- Needs electric power
- If a power outage was to occur, the VoIP phone service would cut off. This is because a regular phone is kept in service by the current supplied through the phone line. This is not possible with IP phones.
- Reliability
- VoIP relies on an internet connection, therefore your VoIP service is affected by the quality and reliability of your broadband Internet service and sometimes by the limitations of your PC.
- Voice quality
- VoIP itself could improve a bit on the voice quality but most of the time, the quality of the service depends on factors such as: your broadband connection, your hardware, the service provided by your provider, the destination of your call etc.
- Security
- Security is a big concern with VoIP. The most common issues with that are identity and service theft, viruses and malware, denial of service, spamming, call tempering and phishing attacks.
Summary
VoIP still has a lot to improve on, although you get quite a bit of features, considering the low cost of the service. Some of them are even free such as the mentioned Skype. TeamSpeak on the other hand, it is free, although if you want to set up larger conference calls, you need to pay a subscription fee.
When it comes to reliability, VoIP is not that great, then again
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