Hello i am new to the nortel switch and havent had my training yet so bear with me. I have a meridian1 61c switch with serveral analog and digital phones running. However one digital phone I have gets new calls and messages and the indicater light does not light, it does light when rnging. The phones have been flashed with upgrade, and replaced and same problem what can i do? and what ld or lds do i need to look at? thank you for your time keith