When answering this question, start by outlining the key components of a VoIP system, such as IP phones, VoIP servers, gateways, and the underlying network infrastructure. Explain how these components interact to facilitate voice communication over the internet. Mention protocols like SIP (Session Initiation Protocol) and RTP (Real-time Transport Protocol) that are essential for call setup and media transfer. Provide a high-level overview of the call flow, from dialing a number to establishing a connection and transmitting voice data. Use diagrams if possible to illustrate the architecture. Conclude by highlighting any relevant experience you have with designing or managing VoIP systems, emphasizing your familiarity with industry standards and best practices.
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