Someone asked for an explanation of VoIP
Basically there are two options... Several players
First a short explanation of "how it works" NOTE: this is also how traditional land line phones work now days in most cases for long distance (Local may still be analog)
Your voice is picked up by the mic in the phone, and then run through a digitizer (Analog to Digital converter) this is then sent via Internet Protocol to the telephone device on the other end where it is converted back to analog (Digital to analog) and sent to the speaker... The sound card in your computer is most likely both an DA and AD converter and may be used by the VoIP service
The internet is the same internet that you use to read this post
Now, the plans and players
most VoIP players, including IntellaPhone (See my sig for a link) offer free customer to customer. and a per minute or per month or in the case of Magic Jack per year fee for calling non-customers
Customer means if you have Intella-phone, and I have intella-phone we are "local" to each other (no charge)
Non-customer means if I have Intella-phone (Which by the way I do not, yet) and you have AT&T land line, or Magic Jack, or Skype or Vonage (yuck) or _______. I pay the fee. It is that simple
I have used Skype, it worked well over the Hughes 2-way sat internet. I have no problem suggesting it to RVers. Once I'm able I will test Intella-phone, I did ask them but they were not sure. Till then I list a link in my sig but that is all.
Magic Jack is a very interesting service. again I've not tested it though.
Other comments:
Some services will sell you a "hard phone" or phone adapter. This plugs into your router, and either IS a phone, or you plug phones into it, and it works. From the end user's point it's no different than a land line.
Other services only have software phones or USB phones, these require you have a computer to use the phone. SKYPE, IIRC has a wi-fi phone, (works with a wi-fi router) Intella-phone has a hard phone (Cat-5 or cat-6 cable) Magic Jack is a USB device Both Skype and Intella-phone have USB solutions as well.