Working on an older system. Shutdown for move. Probably 1.0 SW. It's the older software with 1. General, 2. etc. Components are MICS, Flashtalk, 2 7310, 1 7324. Line 3 doesn't show up on the main unit (7324) which has ring and appear for all 3 lines. I can get lines 001 and 002 on this set...