Here is one way to approach the transition, starting today. If you can leave Asterisk running somewhere and you already have say a domain name that you use for

Here is one way to approach the transition, starting today. If you can leave Asterisk running somewhere and you already have say a domain name that you use for a blog or personal website, then you can point iax.domain.com to your Asterisk and start telling people to contact you at for example: user:pass@iax.domain.com/2000 To make it more readable just use your first name as the user, and your region or some other keyword as the password; its meant to be given out to the public anyway. Client software to make and receive calls using this approach is called iaxComm. If you wanted your Asterisk installation to forward your calls to your cell phone at certain times of the day, or when your iaxComm wasn't signed in, then you'll have to subscribe for an outgoing voip service. Eventually most people would be accessible through iax and you wouldn't have to subscribe to any service to reach the prior infrastructure.