This post will tell you about SIP, how to go about hosting a SIP Server, creating your own SIP internet network, and more on a Windows PC. SIP stands for Session Initiation Protocol. It is a protocol ...

Of Pingtel’s three open source IP PBXs, we tested SIPxchange Enterprise Communication Server, Version 3.7. Pingtel also has the SIPxNano for fewer than 30 users, as well as a free, downloadable ...

Session Initiation Protocol (SIP) is a control (signaling) protocol developed by the Internet Engineering Task Force (IETF) to manage interactive multimedia IP sessions including IP telephony, ...

You'd have to host a full SIP server at your house, and then you could deploy something like the DP752 and DP720 to their house, aimed at the private IP you're routing over Wireguard. SIP encryption, ...