Dear Sean Devoy, overall switching to VoIP is not painful until boxes is implied. Actually almost every phone operator already switched to VoIP in theirs core, leaving analog phones to clients. Using FS I don't hear any quality loss, delay, connection delay, echo when using normal clients, ie. VoIP phones or SIP clients with headsets. Especially connection delay is virtually zero. I see this with pressing calling and immediately starting call the other end which is connected thru two phone operators. Nor audio delay I hear if internet channel is not full loaded. Skype is the same VoIP just using different protocol. And you are right, hearing echo is the other end problem. Generally, VoIP can not induce echo in wires, as each direction is send using packets, compared to analog phones where echo is heard (especially on long distant) because of wire induction. My wander is how skype client (or may be server) does echo removing on same client which uses boxes and microphone which will create the echo. May be there are SIP clients which removes echo o client like skype client does. We tried here to connect two clients with FS (it may be asterisk or other server it is no matter) both using boxes and microphone. Its not only echo we get, but also a sound loop getting louder and louder. Same clients switch to skype call and no echo, clear sound. This is a step forward to using VoIP and not skype. -- Mimiko desu.