www.windowsnetworking.com

Features a wealth of tutorials on various Windows networking related topics such as setting up Windows NT/XP/2000/2003 networks, troubleshooting, connectivity and more. Also includes a comprehensive archive of reviewed networking software. Networking A ...

nerdvittles.com

A blog on PBX and VOIP. This also seems to be home of Incredible PBX for Raspbery Pi.