Q: What is Voice over Internet Protocol (VoIP)?
A: VoIP is a term used for a number of protocols that are used to carry voice data over packet switched networks, such as the internet.
Q: How does VoIP help reduce costs?
A: VoIP reduces costs as it eliminates the need for a dedicated line for telephony and fax.
Q: What technical problems arise when carrying voice data over packet switched networks?
A: The main problem is ensuring service guarantees, such as throughput and response time, as not having this can result in a loss of signal or "hiccups" during calls.
Q: Can emergency calls still be made using VoIP if power is lost in the area?
A: No, VoIP usually does not provide this possibility.
Q: What is the issue with using the LAN for both voice and data?
A: The LAN becomes a single point of failure, meaning that if there are problems with the LAN, it can also affect VoIP calls.
Q: What are the two main protocols used for VoIP systems?
A: The two main protocols used are SIP (Session Initiation Protocol) and H.323.
Q: What is the difference between SIP and H.323?
A: SIP has become the standard for multimedia sessions on the internet and is modular to allow for customization. Meanwhile, H.323 has become the international standard for all communication over packet-switched networks and focuses on voice, video, and data communications over IP networks.