I am setting up a simple 4 phone system with two lines. extensions 100-103. both lines on extension 100 I have to appear and ring, on all other extension I have both lines set to as appear only. During night I have all extensions unnassined exept 102. I want only extension 100 to ring during day mode. I want only extension 102 to ring at night. Day works how I want, but at night both 100 and 102 ring.