Only 96 circuits in each box
OK, I know it's not a bragging thread, but a couple of jobs ago. Sorry about the picture quality, taken with my phone which at the time only had a lousy camera.
The front, middle rack has phone connections at top and ethernet hubs at the bottom. Racks either side have connections to network outlets - heading on for 1000 including the small rack in another building. Patch leads all colour coded - yellow for ethernet, green for telephone, blue for serial (we still had heading on for 100 serial terminals and printers back then), and red for "don't even think about unplugging that" circuits
Back of the phone connections. Different wirting for different connection types (analogue, digital, ISDN). Needed a crib sheet to keep track of how to wire those.
And the back of the racks with the bundles of cables coming down the cable tray and fanning out to the patch panel connections
I liked when people would take a peek in the server room and express about how complicated all that wiring looks. Each cable has 4 pairs in it (when in form, I could manage just one or two errors in 100 outlets (two ends each)) - but all the same and all connected the same, so really not complicated. The most complicated was the phone system where the digital extension ports used one pair each, the analogue extension ports also used one pair each but to avoid needing adapters at the user end I added ring capacitors on the back of the panels, and the ISDN ports used two pairs each and I doubled up so each port has two sockets on the patch panel (an ISDN-2 connection can have more than one device on it).
The most "fun" part of that job was when a department manager would call and say "we've just moved, can you come and re-connect us". It was then a drop everything else, work out where their users had been connected to before they unplugged everything, and move the patch panels to where they are now sat.