Is there any way with a Merlin 410, Feature Package 1, to transfer an outside call to another outside line without tying up 2 lines? Example: A call comes into the office and it needs to be transferred to another office at a different local. As I see it, they can hit "Conference", then select another line and dial the number of the other office. Problem is that the original person who received and transferred the call cannot hang up, so both lines are used until the call is completed.I know that the original person can put the line on hold, but this still ties up 2 lines. Is there another way besides using "Conference?