it isn't different...
it is something common to many receivers. it is the "flag" of encryption. in linux receivers there is a "detour"
in non linux receivers, depends the software. for a few of them could be a newest software which could give a solution, or for other, a force unlock, a settings edit maybe... ,or not supported!
but in the past, the same happened in sd ert services, and also to ertsportHD which is now ert1 hd. so somehow it fixed, if you can find something about...
the -. channel bring the encryption and it is ert2HD too
all the above channels are encrypted in biss , and as i saw today there are a lot posts about...
->The problem is in fact those channels doesn't have an ENC flag. Boxes like SX88 etc. clears those channels by adding the known BISS key in BISS section.
ERT is NOT Biss Encrypted there is no CaID 2600 (or CaID 2610 Biss2) present, still very similair to Biss and on most devices works the same as Biss, but this is why some receiver/decoders have issues.....