you should have used real ring groups instead of phantom and create a real ext 100 and unused xdp jack works nicely along with mailbox 100 and make 100 the lowest number in the ring group set dil to fdn 191 and then set intercept routing to 165 for
that trunk group guess were unanswered calls are going to wind up? if this is a newer kx-td you can also get rid of the blinkie fwd light