Our very small nonprofit Chrisitan school was recently doanated a Prostar 56ex/120mx system (with package B software module) which I have just installed. I have encountered 2 problems, for which someone hopefully can provide guidance. (1) The NiCad battery on the main board appears to have met its useful life - I need the battery number and a source for same. (2) For some reason- only extension 201 on the system will ring incoming calls (I have verified that all programing options are set for all phones to receive calls). I am at a loss to remedy this problem (could it be the result of the discharged NiCad battery on the main board?). Any help on these items is appreciatyed! Thanks in advance. PCCS