OER is an NTCIP standard. Is there an ITU-T ISO version?

Yes, the Octet Encoding Rules are specified by the Rec. ITU-T X.696 | ISO/IEC 8825-7 Specification of Octet Encoding Rules (OER).

Note: OSS ASN.1 Tools for C version 10.0.0 implement the older version of OER, specified by NTCIP 1102:2004. If you are using OER we strongly recommend that you upgrade to 10.1.0 or later.


The samples included with some of the Knowledge Center answers are meant for your general understanding of the OSS products. Different versions of the products might produce slightly different outputs. Consult the products documentation and samples for the most up-to-date products information and code examples.



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