What is Voice over Internet Protocol (VoIP)?

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.

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