I have two Mics networked together. I can call between them using target lines and setting the rec'd digits to match the ext. and ring only on that set. This is going to use up all my target lines however and need some for did use. I was told this was the only way to do it by that I mean using target lines. Is there a way to actually make system A call system B DN to DN without having to use a target line on each set. If so how and do I have to have the advanced networking keycodes to do it. All I need to accomplish is station to station calling between the systems, no voicemail. Any help with this would be appreciated.