Intelligent transport systems -- Communications access for land mobiles (CALM) -- M5
This standard has been revised by ISO 21215:2018
ISO 21215:2010 provides specifications of the access layer (OSI layers 1 and 2 and the related management functionality) of a communication interface (CI) named "CALM M5", operating in the 5 GHz microwave frequency range.
A standard is reviewed every 5 years
Revisions / Corrigenda