Grandstream Networks 200 User Manual

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Voice Activity Detection or Voice Activity Detector is an algorithm used in 
speech processing
 wherein, the presence or absence of human speech is 
detected from the audio samples. 
 
 
VLAN 
A virtual LAN, known as a VLAN, is a logically-independent network. Several 
VLANs can co-exist on a single physical switch. It is usually refer to the IEEE 
802.1Q tagging protocol. 
 
VoIP
  
Voice over IP 
VoIP encompasses many protocols. All the protocols do some form of signalling 
of call capabilities and transport of voice data from one point to another. e.g: SIP, 
H.323, etc.