[Freeswitch-dev] Call Hold ans swapping on FXS

Hi, I'am trying to use Freeswitch(with FXS) as a UA. Everything is fine for a outgoing and incoming call. 1)On doing a hold (flash) on the FXS the call is put on hold but there no SIP signaling (i.e re-invite is not sent to the peer). How can I force freeswitch to send a re-invite? 2) I'am not able to establish a consultation call as it is conferenced with the first one as soon as the second call is connected. This also prevents from swaping between calls. The call swapping feature seems to have been removed by introducing the transfer/conference feature. Is there away to achieve call swapping ? Appreciate your help. Thanks in advance -Sanjeev