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Tell me about Optera and the MCS600 battery/rectifier shelf

Tell me about Optera and the MCS600 battery/rectifier shelf

(OP)
We use some old Nortel Optera equipment to connect 35 buildings to our fiber network (about 45 miles, some buried, some ariel).
The Optera is working fine, though parts are getting a little harder to come by. My question is about the rectifier shelves and equipment that are powering the Optera.
The rectifier equipment is labelled as Delta MCS 600. At each location, we have a shelf with 4 rectifiers and 1 CSU on it, and another shelf for batteries. We had the batteries replaced 2 yrs ago and since then, we notice that we get a lot of what seems like false alarms for hi battery temp. The batteries are never hot or even warm to touch, so I am assuming that my monitoring system (CSU's) are a little wacko. The sensor is a thermcouple on the end of a cable that ties back alarm points on the chasis. That thermocouple just sits on top of the batteries and is not fastened to anything. Should it be?

Does anyone else use the MCS 600 rectifier equipment? I've Googled around and can't find much about it

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