> Bestie has a Tin Can? Free calling to other Tin Cans is included for every device, no subscription required.
> Subject to a valid account & our terms of service.
Yeah, subscription aside (though that alone is a deal-breaker for me) I don't like it requiring an account.
Might there be a way that an open-software/hardware device could simply have a person enter, what, a friend's IP address to make a call? Or is there more middleware required to connect the two VoIP?
> Or is there more middleware required to connect the two VoIP?
You need an address of record to translate 111222333 to an actual deliverable location, like a PBX. You can do without it in a software solution, but in the age of NAT having a TURN server is highly advised.
> I don't like it requiring an account.
Remember the value proposition here is for kids calling trusted contacts. You could absolutely and easily build your own VoIP network with Asterisk etc.
I didn't realise this. However, it would seem that it isn't as clear cut as you suggest:
(From Wikipedia):
The generally accepted highest summit is Mount Elbrus (5,642 m or 18,510 ft) in the Caucasus, appearing on both the Bass and Messner lists. However, because the location of the boundary between Asia and Europe is not universally agreed upon, its inclusion in Europe is disputed: if the Kuma–Manych Depression is used as geological border between Asia and Europe, Caucasus and Elbrus lie wholly in Asia. If the Greater Caucasus watershed is used instead, Elbrus' peaks are wholly in Europe, albeit close to the border with Asia. Mont Blanc (4,810 m or 15,781 ft), lying on the border between France and Italy in the Graian Alps, is seen by some to be the highest mountain in Europe.
