[OpenSIPStack] ATLSip:call transfer / hold and Auto answering

[Meftah T. <tay...@gm...>]

hello OpenSipStack users,
please cool you tel me if is it pocible to transfer calls using AtlSip?
also, is it pocible to hold the call?
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and is it pocible to auto answer the Call?
if yes, how i can Play audio File unstid of the Microphone device?
thanks