I think it is possible to have 10 TRXs per cell.
3 TRXs just carry BCCH in the separated Channel Group number 0 without hopping and 7 TRXs can be shared between 3 sectors with SFH e.g. configuration can be 3+4+3.
Please note to this formula:
“number of frequencies in the HFS” >= 2*(number of TRXs in the CHGR)
alex, yes, i was talking about SFH TRX, hence not taking into account the “bcch” trx.
the actual rule, in SFH 1×1, is to have nb of “tch” TRX < 12% * nb of MA frequencies.
otherwise the soft blocking is going to be over the top !
in "MAIO"'s situation, i strongly recommend a BBH solution, not SFH.