[Freeswitch-users] Equivalent of "s" extension in Asterisk

Hi List, I'm quite new to FreeSwitch and I'm trying to replace an old asterisk installation with a new FreeSwitch. There is however one feature that is available with Asterisk and I haven't managed to figure it out how to do it with FreeSwitch. That is about the "s" extension in Asterisk dial plan. In the old Asterisk installation, when I pick up an analogic phone (plugged into an FXS slot of a Digium card) the "s" extension gets run and I can play early media to the phone. Does anyone know if it is possible to achieve the same thing with FreeSwitch/FreeTDM? Best regards, Brian