I've been through the documentation section of the site, but have not been able to find user's manuals/practices specifically for the 750/850 BCU or RCU's. Are PDF's of such available?
The only documentation we have on the BCU and RCU is contained in the "System Manual" which can be found here: https://www.adtran.com/pub/Library/Manuals/Default/Total_Access_850_System_Manual.pdf
Hope this helps,
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