Are you sure about this map, Seph?
I suspect the 230v cabinets you call launch are actually optical nodes - as I understand it the nodes do the RF launch and the rest of the amplifiers in the cascade, which isn't many on the modern network, are line powered from a power supply at the nodal cabinet.
[SEPH]: I do have photos of one or two launch cabinets in my area. There is no optical equipment in them. See below
I'm not aware the MSANs, Metnet and P/SDH kit sit in the same cabinets as the HFC nodes. As I understand it they are separated in no small part because they are worked on by different teams and they require a higher level of protection and resiliency - you should never, ever see a telco or optical network cabinet open.
[SEPH]: In that case, the 230v cabinet I photographed wasn't an optical node! Incidentally you told me that before - the non mixing of telephone stuff and optical nodes. But I did get some first hand info as to their location from someone senior in the area.
To add to the joy also the relationship between node and served area isn't necessarily 1:1 - depending on the node in use
a single node can take
4 optical feeds, deliver 4 coaxial outputs and hence power 4 nodal areas from a single cabinet.
[SEPH]: So how many optical nodes would you think Winnersh should have? I've nerded the area so often and the only boxes with fans and vents are the ones shown as
M in the PDF.
I would hope that no nodal area is more than 500 premises passed. Newer build is 250, and newer build still even fewer.