De sidste tilføjelser til DCC systemets [[dataprotokol|protokoller]], giver også mulighed for, at de enkelte DCC dekodere (f.eks. lokomotiverne) kan sende beskeder tilbage til Command stationen. Lenz kalder dette RailComm. Det er dokumenteret i S-9.3.2.
<ref>[https://www.nmra.org/sites/default/files/s-9.3.2_2012_12_10.pdf S-9.3.2 DCC Basic Decoder Transmission] {{Webarchive|url=https://web.archive.org/web/20180630162041/https://www.nmra.org/sites/default/files/s-9.3.2_2012_12_10.pdf |date=30. juni 2018 }}, (hovedadresse: [https://www.nmra.org/index-nmra-standards-and-recommended-practices NMRA Standards and Recommended Practices] {{Webarchive|url=https://web.archive.org/web/20180701083331/https://www.nmra.org/index-nmra-standards-and-recommended-practices |date= 1. juli 2018 }})</ref>
Kommunikation Teknologi