My understanding of NI demographics is that there are a lot of people in rural areas, and not that many existing PCP cabinets to site FTTC cabinets next to. The result is that a fair number of rural lines are too long to benefit from FTTC.
The original DETI project helped support a lot of rural cabinets, so what you are now seeing is likely to be one of two things...
- More cabinets like the previous ones, sited next to existing PCP cabinets. This puts coverage into new areas that haven't been touched before.
- Entirely new cabinets (perhaps all-in-one, as Ribble says), aimed at putting both a PCP and an FTTC cabinet closer to the end-users than the previous type. This style of deployment might match the ones being trialled as "FTTRN" (fibre to the remote node), where the new node is a deliberate way to extend the coverage range of an existing FTTC cabinet.
The hardware within the cabinet is a DSLAM or MSAN (which are the technical abbreviations for "small broadband exchange"), and might differ in these new cabinets. You can see the existing types of DSLAM in this old post