Question: 1. Define PBX.
2. Define PSTN.
3. What is the purpose of a gateway?
4. List four enhanced features of SS7.
5. What are the signaling techniques used in IP telephony?
6. What are RTP and RTCP used for in VoIP?
7. What does a processor in a VoIP receiver do if a voice data packet is lost?
8. How is the timestamp on VoIP data packets used?