[Freeswitch-users] Help about Conference and it's member_id

[to vietduc]

 Hi!
 I wonder how to get out the member_id of a member in a conference room? Currently, i found that it is increasing 1 each time, so the first one enter the conference room, his/her member_id would be 1, and the second is 2. Sadly, when i close a conference room (all members leave) and re-open it later, the member_id will be increased since the last time instead of begining at 1 as the first time (said, it may be 3, 4 and go on). Why is that (as i think a usual way is that if there is 3 members in a conference room, their member_id should be 1,2,3 or 0,1,2) and is there anyway to get conference's member_id of a member programatically?
 Thanks in advance!
 Duc To