thanks for your help, just a question: in the rules I found all
digital modes allowed, not just the RTTY.
"1. Objective: Amateurs worldwide contact and exchange QSO information
with other amateurs using digital modes (Baudot RTTY, ASCII,
AMTOR, PSK31 and Packet—attended operation only)"
I think the most contest logging software logs only the QSO has
maded in digital modes, not save the accurate mode. When Tlf
exports the log to Cabrillo format ("6.3. All logs that are
created electronically are required to submit their electronic
log file in Cabrillo file format."), it changes the "DIGI" mode
to "RY".