Grandstream Networks HandyTone-502 User Manual page 31

UDP User Datagram Protocol (UDP) is one of the core protocols of the Internet protocol suite. Using
UDP, programs on networked computers can send short messages known as datagrams to one another.
UDP does not provide the reliability and ordering guarantees that TCP does; datagrams may arrive out of
order or go missing without notice. However, as a result, UDP is faster and more efficient for many
lightweight or time-sensitive purposes.
VAD 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 the Internet. VoIP encompasses many protocols. All the protocols do some form of
signaling of call capabilities and transport of voice data from one point to another. e.g.: SIP, H.323, etc.
Grandstream Networks, Inc. HT-502 User Manual Page 31 of 31
Firmware 1.0.0.29 Last Updated: 01/2007