BarTender:
As soon as Telecom indicated the cabinetisation project then the whole business model of UCLL was toast, none of the other providers had the pockets to install DSLAMs like for like in every cabinet and they would cherry pick the cabinets that make financial sense. I don't think any RSPs ever took up the option to install gear into cabinets and only focused on Exchange UCLL customers to the significant detriment of cabinetised customers.
The numbers I saw for cabintised unbundling were such that once you were paying for the space plus backhaul to the cabinet you could barely break even if you 100% filled your DSLAM with customers. The numbers just did not work, that's why no one unbundled the cabinets.