Welcome to the csn1.info website. This site contains a description of the CSN.1 (Concrete Syntax Notation 1) language widely used by ETSI and 3GPP for the encoding of 2G/3G messages.
The information here reported are taken from official documents and integrated by the long experience made by
in the encoding/decoding field.
, which is sponsoring this site, is the maker of
, a market leader encoding/decoding generation tool, which has a complete support of the CSN.1 language.