have a partner acs with 6 CO lines - 5 lines go through lightning protection and into system and work fine - 6th line wont ring if run through protection - other issue here is an OPX/leased lines to a partner phone in an outbuilding - which of course is one of the phones they want to ring on incoming calls on line 6 - line 6 wont ring any of the phones when going through protection even with opx disconnected - however line 1 will ring all phones including opx with no problems - any thoughts/suggestions??