Quote:
Originally Posted by Sephiroth
I promised some photos. There is a typical street cabinet photo, a 230V cabinet photo and a PDF of my nerdish research in Winnersh.
The PDF differentiates typical cabinets from 230V cabinets (Optical Nodes) and also shows the BT Infinity cabinets. The number of houses per street is also shown so that I could get the homes passed number. It's 39 homes passed on average per street cabinet and 480 per optical node.
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From what I can make out neither of them cabs have a 240v feed. Only the optical nodes as you call them (or launch cabinets, or mux a's) have a 240v feed you can tell this has it will have a RCB device. This is then wired into a PSU either an all in one unit that splits the power into 60v and 48v or two separate units.
A typical area in the Northwest (ex Nynex build) would be something along the lines of the following.
Fibre to optical node 4 of those this is then converted into RF into the launch amp for the area, these then feed either trunk or line amplifiers, never any more than 4 in the cascade, on average 14 per area, each amp feeding a 48 way tap block.
So each cabinet can serve 48 homes
Each area on avarage 672 homes
each optical area 2600
These are only averages .