I was trying to find a solution for these 2 issues in several threads and internet sources (including the great "phone control" wiki page) but was unsuccessful.

my two issues:

1. is it possible to answer a call from Skype using a DBUS command (not a regular phone call which can be answerd with this:

dbus-send --system --print-reply --dest=com.nokia.csd.Call /com/nokia/csd/call/1 com.nokia.csd.Call.Instance.Answer)

2. how can the volume of the call itself be changed using dbus? setting the volume with:

dbus-send --type=method_call --dest=com.nokia.mafw.renderer.Mafw-Gst-Renderer-Plugin.gstrenderer /com/nokia/mafw/renderer/gstrenderer com.nokia.mafw.extension.set_extension_property string:volume variant:uint32:50

won't affect the conversation voice level which i want to set to maximum.