[asterisk-users] Particular DialPlan

[nik600]

Hi, can i set up a similar dialplan?

Suppose that extension 4444 make the caller to join a conference room.

extension => 3,1,Dial(SIP/200,SIP/4444 at localhost)
extension => 3,2,Dial(SIP/201,SIP/4444 at localhost)
extension => 3,3,Dial(SIP/4444 at localhost)

After that, the caller, the user 200 and the user 201 should be in the
conference.
Is it correct?

Thanks