HPR4441: Voice Over IP

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Voice over Internet Protocol (VoIP), also known as IP telephony, is a set of technologies used primarily for voice communication sessions over Internet Protocol (IP) networks, such as the Internet. VoIP enables voice calls to be transmitted as data packets, facilitating various methods of voice communication.

• Voice over IP - https://en.wikipedia.org/wiki/Voice_over_IP
• Plain Old Telephone System (POTS) - https://en.wikipedia.org/wiki/Plain_old_telephone_service
• Retirement of circuit-switched public switched telephone network (in the UK) - https://en.wikipedia.org/wiki/Telephony_copper_plant_retirement_in_the_United_Kingdom
• Session Initiation Protocol (SIP) - https://www.ietf.org/rfc/rfc3261.txt
• Network Address Translator (NAT) - https://datatracker.ietf.org/doc/html/rfc2663
• Session Traversal Utilities for NAT (STUN) - https://datatracker.ietf.org/doc/html/rfc5389
• Voice over IP Companies - https://en.wikipedia.org/wiki/List_of_VoIP_companies
• Voice over IP Hacking - https://en.wikipedia.org/wiki/VoIP_vulnerabilities

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