I recently set up my Asterix server with GrandCentral, a VOIP service from Google. Asterix is a great softPBX and I used to link some of my friends and family members so we could make free calls. Many devices today support SIP such as Cisco VOIP phones and the Apple iPhone. While talking with friends was cool, if they didn’t have a SIP supported device I couldn’t call them. The issue with VOIP is that you need PSTN termination if it is to be useful for the outside world. Like any service this costs money, but with GrandCentral I can make and receive calls for free. This has expanded the use of my Asterix server and has allowed me to greatly cut down on my cellular minutes. I mainly use GrandCentral with my Cisco 7960 VOIP phone, but it also works on my cell phone with a SIP client. This allows me to be mobile and still use GrandCentral and my Asterix server in combination with Sprint’s EVDO service for free calling. Sadly GrandCentral is no longer accepting beta testers, but hopefully it exits beta so everyone can enjoy free calling.