- Grandstream SIP Enterprise Phone User's Manual GXP 2000
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 t
he reliability and ordering guarantees that TCP does; datagrams may arrive out of 
rder or go missing without notice. However, as a result, UDP is faster and more efficient for many 
s. 
e audio samples. 
. 
o
lightweight or time-sensitive purpose
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 th
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.  GXP-2000 Users Manual  Page 33 of 33 
  Firmware 1.1.1.14  Last Updated: 12/2006










