A SIP phone is an internet-connected device that allows you to make and receive telephone calls. SIP phones transmit voice data via the internet rather than traditional phone lines. This has numerous advantages over traditional phones, including lower prices, enhanced functionality, and wideband audio (HD voice). In this article, we will define a SIP phone, explain SIP technology, compare the best SIP phones, and go over key features.
https://www.contus.com/blog/what-is-a-sip-phone/
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