Question for VoIP

1. What are the names of the main protocols used for carrying Voice traffic across Internet Protocols and what Transport Layer protocol is used
2. What typical end-to-end delays (latencies) are acceptable for a Voice connection and why
3. What bit-rates are typically used for carrying Voice traffic and how do they compare (eg. as a percentage) with the standard Ethernet LAN bit-rates
4. Describe what would be needed to make a typical PC operate as a VoIP terminal
5. Name some of the key parts of a VoIP system and explain how they are used in making a phone call from one VoIP terminal to another 6. Explain what needs to happen for a Voice call initiated on a VoIP terminal to a phone on the Public Switched Telephone Network (PSTN)
7. Explain how a voice-mail system can be implemented in a VoIP system. What extra equipment may be needed
8. Explain how a low-cost International Call provider uses VoIP to make lower-cost connections than a typical telecommunications company and what methods they may employ to make their offerings cheaper than the opposition. Include an explanation of what equipment may be used to do this

Thanks