Editing Digital Command Control (section)

=== RailCom ===
In 2006 Lenz, together with Kühn, Zimo and Tams, started development of an extension to the DCC protocol to allow a feedback channel from decoders to the command station. This feedback channel can typically be used to signal which train occupies a certain section, but as well to inform the command station of the actual speed of an engine. This feedback channel is known under the name RailCom,<ref>{{Cite web |date=2023-10-30 |title=Digital Command Control and RailCom |url=https://dccwiki.com/RailCom |access-date=2023-11-16 |website=DCCWiki |language=en}}</ref> and was standardized in 2007 as NMRA RP 9.3.1.

Quoting "NMRA Standards and Recommended Practices":<ref name="NMRA Standards and Recommended Practices">DCC Home Page [https://www.nmra.org/index-nmra-standards-and-recommended-practices "S-9.3.1 (discontinued)"], ''NMRA.org'', accessed November 23, 2018.</ref>

:S-9.3 DCC Bi-Directional Communications Standard
::S-9.3.1 (discontinued)
::S-9.3.2 DCC Basic Decoder Transmission - (updated 12/20/2012) UNDER REVISION