Glossary

DDI
Direct Dialing Inward
DID
Direct Inward Dialing
DTMF
Dual Tone Multi-Frequency
PSTN
Public Switched Telephone Network
RTP
Real-time Transport Protocol
SIP
Session Initiation Protocol
TCP
Transmission Control Protocol
UDP
User Datagram Protocol
Next topic: Provide feedback

Was this information helpful? Send us your comments.