Where ERTMS/ETCS and Class B train protection functions are installed on-board, the transitions between them can be managed with a standardised interface as specified in Annex A 4.2.6.a.
Kui rongile on paigaldatud ERTMSi/ETCSi ja B-klassi automaatblokeerimisseadmed, saab nendevahelisi üleminekuid hallata lisa A punktiga 4.2.6a ette nähtud standarditud liidesega.