The only Minitor pagers to ever feature a PL option were the original Minitor I series, and it was a very rare option at that. Nothing from the II to the current V had or has a PL/DPL option. CSQ only. In addition, a Minitor I equipped with a PL board could not decode tones, so there was never a Motorola voice pager that had both PL decode AND tone decode in the same unit.
As far as the tones being transmitted CSQ, the only benefit to doing that is so a receiver with PL/DPL enabled wouldn't have to "hear" the tones. That's fine for voice pagers, which are all CSQ and unaffected by the presence or absence of PL/DPL. The problem comes in with units like portables that have PL/DPL enabled and are functioning as alert receivers. They may not open up even for a correct tone sequence unless the PL/DPL is present. I have personally never come across a system that did not transmit the PL/DPL at the same time as the tones, so I doubt it's very common practice, particularly in FD/EMS ops where portables are often used in lieu of pagers.
Hope this helps.
