A2X(W)/A20LTE IP Phone User Manual
ATCOM TECHNOLOGY CO., LIMITEwww.atcom.cn98
9. Abbreviation
DND：Do Not Disturb
CFWD：Call Forward
Bxfer：Blind Transfer
Conf：Conference
Num：Number
SIP：Session Initiate Protocol
RTP：Real-time Transport Protocol
SDP：Session Description Protocol
VPN：Virtual Private Network
VLAN：Virtual Local Area Network
QoS：Quality of Service
Syslog：System log
UDP：User Data Protocol
TCP：Transmission Control Protocol
TLS：Transport Layer Security Protocol
BLF：Busy Lamp Field
DNS：Domain Name System
SRTP：Secure Real-time Transport Protocol
NTP：Network Time Protocol
VAD：Voice Activity Detection
CNG：Comfort Noise Generator
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