CallTransferOption doesn't seem to effect on self-transfer

I'm having some problem with getting CallTransferOptions.MaximumTransferTime to take action on my self-trasnfer.

E.g.:

void MyCallTest(AudioVideoCall avCall)
{
	try
	{
		avCall.ReplaceTo = "sip:myuser@domain.com";
		avCall.ApplicationContext = avCall;
		avCall.BeginTransfer(avCall, 
					new CallTransferOptions() { MaximumTransferTime = new TimeSpan(0,0,300) }, 
					ar => 
					{
					     avCall.EndTransfer(ar);
					},
					null);
	}
	catch (Exception)
	{
		throw;
	}
}

The transfer is fine, and my target client (in test a Lync user on lync client) is receiving the call. But if I leave the call without answering, I'll get a

Microsoft.Rtc.Signaling.FailureRequestException

after 60 seconds, and not 300 sec which I expected since it has been set in the CallTransferOptions.

What did I miss??