bell system/we apparatus help needed

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looking for some help in identifying some equipment. I have a
couple of Western Electric/Bell System/ATT apparatus units. 30AM.  One
has an RN1J82 number.  I think they are part of paging adapters; one
is labeled EMERGENCY AUDIO.  I'd be happy to email a picture if
someone can help me identify what they are, and perhaps send me a BSP.
I have a bunch of BSP manuals, but don't have a number and haven't
been able to find it.

Can anyone assist?

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