A Windows SIP client is a software application that allows users to make and receive phone calls over the internet using the Session Initiation Protocol (SIP). SIP is a signaling protocol that is used to establish, maintain, and terminate multimedia sessions, including voice calls. Windows SIP clients typically support a variety of features, including call forwarding, call waiting, and caller ID. They can also be used to make and receive video calls.
Windows SIP clients offer a number of benefits over traditional phone service. They are typically more affordable, as they do not require a landline or a monthly subscription. They are also more flexible, as they can be used from any location with an internet connection. Additionally, Windows SIP clients offer a number of features that are not available with traditional phone service, such as call recording and video conferencing.