A
ADSL – Asymmetric Digital Subscriber Line AOR – Address of Record ATA – Advanced Technology Attachment
B
B2BUA – Back-to-Back User Agent BLF – Business Lamp Field
C
CDR – Call Details Record CLI – Calling phone number CLD – Called phone number COMEDIA – Connection-Oriented Media CPE – Customer Premises Equipment CPS – Calls per Second CSCF – Call Service Control Function
D
DID – Direct Inward Dialing DNS – Domain Name System DoS – Denial of Service DSBC – Dispatching SBC DSL – Digital Subscriber Line DTMF – Dual-Tone Multi-Frequency DTLS – Datagram Transport Layer Security
E
E911 – Enhanced 911
H
HLR – Home Location Register HTTP – HyperText Transfer Protocol
I
ICE – Interactive Connectivity Establishment IM – Instant Messaging IMS – IP Multimedia Subsystem ISDN – Integrated Services Digital Network IVR – Interactive Voice Response
L
LAN – Local Area Network LCR – Least-Cost Routing
M
MAC – Media Access Control
N
NAT – Network Address Translation
P
PAI – P-Asserted-Identity PCI – P-Charge-Info PDA – Personal Digital Assistant PBX – Private Branch Exchange PPI – P-Preferred-Identity PSAP – Public-Safety Answering Point PSTN – Public Switched Telephone Network
Q
QR – Quick Response
R
RPID – Remote-Party-ID RTP – Real-Time Transfer Protocol RTCP – Real-Time Transport Control Protocol
S
SBC – Session Border Controller SDP – Session Definition / Description Protocol SDES – Session Description Protocol Security Descriptions SIP – Session Initiation Protocol SMPP – Short Message Peer-to-Peer SMS – Short Message Service SRTP – Secure Real-time Transport Protocol SRV – Service Record STUN – Session Traversal Utilities for NAT
T
TAS – telephony Application Server TCP – transmission Control Protocol TFTP – trivial File Transfer Protocol TLS – transport Layer Security TURN – traversal Using Relay NAT
U
UA – User Agent UAC – User Agent-Client UAS – User Agent-Server UDP – User Datagram Protocol UPnP – Universal Plug and Play
V
VoIP – Voice over IP
W
WAN – Wide Area Network WebRTC – Web Real-Time Communication
