I found out it's called ringback: http://wiki.freeswitch.org/wiki/Mod_commands#originate On Mon, Jan 5, 2009 at 5:27 PM, kriko <kristjan.ugrin@gmail.com> wrote:

When placing a call between gtalk and sip, one end first picks up and then ringing starts on the other side.

In that time user which answers doesn't hear any tone that could indicate a call in progress and it seems a bit odd. Is it possible to play a track in the meantime, so the caller gets a feeling that something is going on?

-- kriko