Simple VoIP requires very little equipment. More advanced communication Voice over IP requires more sophisticated equipment. What is the equipment for VoIP?
Common VoIP Hardware Devices
IP Phones - Special Phones for VoIP
What is an ATA?
What The Lights On Your Phone Adapter (ATA) Mean
What is a Router? - The Functions of a PBX
Security in VoIP has not been a very popular subject so far, but with the increasing demand for VoIP, it is becoming an important concern. VoIP security threats are increasing in number.
VoIP Security Threats -
Making Your VoIP Secure
VoIP Phishing - What It Is And How It Works
Do Softphones Make My Network or Machine More Vulnerable?