Thanks for the help in advance

I have an acs release 5 with three lines and 5 phones stand alone no back plane line 2 is connected to an alarm before getting to the system.line 2 was shorting (due to the alarm)when I got on site and repaired that they had said that line 1 and 3 would disconnect while on a call from time to time. when I asked if they noticed if the system was going down there responce was no all lights were still on. I could not simulate the problem and was wondering if you guys new of any thing like this and what it might be ??

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Altcomm @ A.S.E Inc