Thanks for alternatives. About a year ago I was looking for open
alternative for Skype (voice connections). Unfortunately, I found that
no such thing exists for connections which are not a server-grade
(with public IP). I'm behind a router, then another one (ISP NAT), with
some port blocking, then probably another one (I'm not sure), and I
cannot use anything except server-based solutions. I haven't found any
open-source solutions working. Half of these just couldn't connect
(throwing illogical errors), the other half tried to manipulate router
which is not mine.
Well, after researching about Skype and how its internals are
protected far more beyond normal copyright (do they try to mask
backdoors this way?), I decided not to go with it and not use voice
communication at all.
MCbx