Was the main node serving 8 other exchanges.
Do you know the way traffic was presented at "this" exchange from the 8 child exchanges?
For example, in a manner that mirrored the "local" cabinets/splitters - GPON fibres and single fibres from ? Or in some other manner?
Separately ...
I just realised that we can see a couple of features by looking at the second OLT in the rack (
picture 23, or the bottom of picture 20)
- The second OLT is dimensioned slightly differently - it has one additional GPON card, and one fewer "FTTC" card.
- The second OLT supports considerably fewer locations at the time of the photo: just 8 GPON splitters and 12 FTTC cabinets.
- The second OLT has 5 pairs running into the "uplink card", just like the first OLT.
With both OLT's have 5 uplink fibre pairs, it could suggest they are being used because the serve 5 different destinations (eg 5 different CP's) rather than being needed for carrying a high volume of traffic. Does this favour them being cablelinks, rather than uplinks to a remote handover node?