Re: Hardware question

Craig, I discovered and used Niagara Networks (nee Interface Masters) for a half-decade or so exactly for this purpose — transparent insertion / optical cut-through on power fail, without having to do a passive optical bleed and finger-pointing about light levels. Also gave me extra diagnostic knobs and visibility for the carrier circuit that was passing through it. https://www.niagaranetworks.com/products/network-bypass-switch -dp