[Freeswitch-users] autoanswer by re-INVITE

Hi! I can send a new call with autoanswer by <action application="export" data="sip_auto_answer=true"/> It works well. But I need some different feature I want to "re-INVITE" existing call with autoanswer option, how can I do this? Or may be somebody knows, how can I make Cisco SPA508G to answer the call with any command from FreeSWITCH. It will be very usefull with headset to answer calls by pressing some buttons with keybord or mouse on PC. From Russia with Love :) EvgineyС уважением Евгений.